 Life in New York, it's Ask an Engineer. Hey everybody and welcome to another Wednesday night Ask an Engineer, it's me, Lady Aida, with me, Mr. Lady Aida, and we're broadcasting live from the Adafruit factory in downtown Manhattan. Behind us is all of the manufacturing line where we make and code and test and ship and video and photo and blog and more. Everything that happens on Adafruit.com and the learning system and Adafruit Daily. It happens here, right now everyone is asleep or at home because it's the end of the day. It's just Mr. Lady Aida and me because we have an hour long show we're gonna do right now called Ask an Engineer and we've got all sorts of good stuff on it. So why don't you kick it off and tell people. On tonight's show the code is wireless LEDs. We have lots of wireless LEDs this week. We had them before in the past and we ran out really fast so I thought I would have a code and more. We'll get to these during new products but if you've been seeing these, we got them. So use the code wireless LEDs. Adafruit Live series of shows we do these every single week. We'll be talking about the live shows we did and show and tell, we just got finished doing that right now. We have a chip shortage this week with everyone's favorite state, Texas. They make instruments, I don't know if you knew. Texting instruments is our chip shortage this week. We'll go over what we need, what we're missing and more maybe we'll ask for their help as well. Got some main New York City factory footage. Got some 3D printing. We're gonna do IDMPI this week is from ST. It's brought to you by Digikey and Adafruit. Got some new products. We'll answer your questions. We do that over on discordadafruit.it slash discord. This is where we answer these questions. Join all 35,000 of us. This is where we're at. All that and more on, you guessed it, Ask an Engineer. Wow! Okay, so just remember code, wireless LEDs. You'll be able to see these this week on our shows and more. But that's the code. And they get free stuff. So if you want, start putting stuff in your cart. Free, free, free, free, free. When are they getting laid out? Okay, I'm glad you asked. When you order from Adafruit.com which helps support us and pay all of our engineers and designers, photographers and videographers and cutters and more, you get some free stuff. $99 or more, you get a free perma-proto half-sized breadboard. Somebody on the show and tell showed off their Eurorack Synth which had a perma-proto in it. So it's how you know they're good. A great way to take your solderless breadboard projects and make them permanent. 149 or more, you get a pink. Excuse me, that's the other perma-proto. You get pink KB2040. It's a lovely little dev board that's great for making keyboards or any other kind of mic controller project featuring the Raspberry Pi, RP2040, it's got USB-C, Stemic UT, buttons, cast-related pads, lots of GPIO, and long inputs and more. It's actually a really great starter board. You can use it with circuit python, micro python or Arduino. And we also have free shipping but apparently there's gonna be a giant, another crisis about like trains on strike. I think trains are going on strike. So we can get- We'll do it, we can't. Free UPS ground shipping. And then we also have a circuit playground. That's right. Express Blue Fruit. 299 or more, you get a circuit playground, Blue Fruit, Bluetooth, low energy capabilities, lots of sensors, LEDs, capacitive touch pads and more, free with your order. And don't forget, please, please, please register on Adafruit.com, verify your account and do two-factor authentication. And if you don't do that for other websites that you use and they offer it, you should because these computers, they're a chatty and this is just one of the things that you could do to have good security, good online hygiene, good ways to keep your data safe. And for some products, like things that are in short supply like the Raspberry Pi, we're only allowing orders from accounts that have two-factor authentication because there's bots. There's people that buy them and then sell them in a huge markup. It really, the worst part about all this is what it does to people. So there's folks who really need to get Raspberry Pi as they can't get them and they're angry. And sometimes, even though we're the only steady supplier that's able to release them each week, people have total meltdowns, yell at our team, they're really mean. I get it, so we don't take it personal because they're just really angry and frustrated that folks are doing this out there. So that's what you can do and if you encourage others to just wait to turn, register on the site, two-factor authentication, we have a Raspberry Pi for you. And you limit one customer so that everyone gets a shot. Yeah, so that's what we're doing. Okay, thanks for the live. So we do a bunch of live shows. We were having the team co-host show and tell. So thank you so much. Liz, Melissa, Pedro, JP, I don't know if Kenny did one. Anyways, we had lots of the team co-hosting the show and tell. So thanks for that. We just got off the show and tell right now. It was so great. A few moments ago, whatever version of time you wanna use. All of them were really good. I would say, I like to pick a highlight. Scrub forward and check out the Burning Man project that Gustav showed because it was made with circuit Python and Burning Man and electronics and even Adafruit, it's all kind of connected. Really neat sensor work and how heartbeats can work. So check out that one. They're all good, but that's definitely one. And there's some good synth projects. Yeah, and there's some good synth projects. And there's really neat projects that everyone did, but that's one to check out. On Sunday, we do Desk of Lady Aida. We have two parts. The first part, usually Lady Aida's showing something she didn't during the week. I've been actually doing a lot of redesign. So I didn't have a lot of new products, but instead I showed off. Well, I did do one quick redesign of the 1.8-inch TFT breakout at iSpy Connector. And I'm going to have iSpy product in the new product section later. And I also showed off some cool, weird, rotary encoders samples that I got and joystick samples I got. And I think that was pretty much. And then I showed off this tester that I'm working on for the Itsy Bitsy ESP32. Yeah. Then we do the great search. And the great search is when Lady Aida uses her powers of engineering to help people find things on digikey.com. This week, what did you help people try to find? OK. So this was actually interesting. Some of the great searches are like finding the parts easy, but what do you learn while trying to find the parts? So there is a FRAM component that we use on a breakout and it got discontinued. And there's a suggested alternative. And this is an alternative in stock and it's a good one. But there's actually, it was a packaging change, not like a chip change or a discontinuation. And so it turns out you can still get the chip, but just in a slightly different molding package. So it's always a good reminder for me and part of the great search is always read the engineering change notes or the product change notes and read them in depth. Because not all of them are the same. Don't assume just because it's something that's being discontinued that it isn't available some other way. Sometimes they really do just kill off a product. But sometimes it's available with a slight tweak in the same pricing that's a little bit more lead time. And JP's product pick of the week happened on Tuesday. Here is this week's highlight. That right there is my product pick of the week. It is the Quad Alpha Numeric 14 Segment LED Backpack. It runs over I squared C. So you know what we did. We did what we always do. We added a STEMAQT slash quick port. There's actually two of them back there. Light up individual segments if you want. Yee-haw, my friend. So I have five of these displays each color. I have them all plugged into each other on the back using the STEMAQT. And then I have that plugged into a little cutie pie here. Each of these I have set the jumpers on to give them unique addresses. Alpha stuff says Alpha Numeric Display. Once you have this set up you can just throw long lines of text added or strings of numbers. It knows what to do. So there's nothing you have to do to manage it. It just access a single display which is terrific. The library is excellent. It is the Quad Alpha Numeric 14 Segment LED Backpack Display with STEMAQT. And don't forget on Thursday, J.P.'s workshop. And then Friday, Deep Dive with Tim. Tim showed a really neat thing on the show until it was this cool flippy clock. And you'll be able to probably learn how to make that and more on this week's Deep Dive with Tim. Friday's at 5 p.m. Eastern time. Okay, I'm doing the quick little Aida box update. The update is there is no updates. We're still trying to get 5,000 plus of many parts. Every single week it's a fun gymnastics performance with just getting all the things for regular customers, regular store orders, all the resellers. And so Aida box is one of those things where we keep squirreling away, putting parts in our cheeks and digging them up. Maybe this winter to ship them out. So no updates. It's a dirt box. Yeah, no updates yet. But if it doesn't look like we're gonna do Aida box this year, we'll let all the subscribers know. There is a lot of people signed up. So if folks go, if you're like, I'm tired of waiting, that's fine. There's people who wanna have that slot. And the other thing is we don't charge your credit card until we ship Aida box. So don't worry about it. But I think because everyone in all parts of their life has just been endlessly disappointed with the things they've wanted, I feel like there's a more understanding than any other time, because we're gonna have an Aida box. It's just, we gotta get the parts. So we'll keep doing the updates. Thanks for your patience. Very much appreciated. And if you wanna tap out, that's okay. Just know it might be harder to get back in later because there's a few thousand people signed up for when people, if and when they leave. Time for a chip shortage. All right, this week's chip shortage. Texas Instruments, they have a chip that we need. Lady Aida, what is it? Glad you asked. It's the TPS 61090. It's a boost converter chip. It's a very nice one. If we'd be using it for almost a decade. It features in the PowerBoost 500. You know, it's basically, it's got nice, it's reliable. It's got indicator LEDs. Like I said, we've been using it in the PowerBoost design. We have the PowerBoost Shield, the PowerBoost Basic, you know, the PowerBoost Plus, whatever. But we can't make any right now and we have a lot of people waiting for them. All right, so if you go to their website. 61? No go, huh? No, you can't get it. Two amp switches. I like it's a built-in switch. It's got, it's the indicators I really like about it. It's got like the low battery output and the power-good output. Yeah, you can't get it. And it's like 55-week lead time from Digi-Key. They're not in stock there either. So yeah, so we went over there, we looked, so what is it, 55 weeks out? Yeah, 55 weeks out. But you know, we actually ordered more than 55 weeks ago and it's still being pushed out. We, I think we've got these on order, what? In October 2021, we're not gonna get these until July, June, July 2023. So it'd be really cool if we got some. So Mrs. Texas. Yeah, so please, please, please. Hair instruments. Texas Instruments. Look at this baby. This is, this is my child. This is a child. Please. Your, your small shipment of chips help all of the power boost children. Please. Please. Please, so anyways, that's our chip shortage for this week. We ordered 6,000 back in October of 2021 and now it's pushed to July of 2023. So luckily someone on Twitter reached out and said, oh, hey, I'm from Texas Instruments. Wanted to. Connect. Wanted to connect, you know. Wanted to instrument. Wanted to collaborate or something. So I'm gonna send this video. Maybe it'll work. But we'd very much like. You can come over if you bring over some chips. Yeah. You don't need to bring over flowers. And we won't have to show this graphic anymore. It's terrorizing. That's a week's chip shortage. It's Python on hardware time. Hey, Blicca. All right. Lot is going on. Newsletter, Adafruit Daily. We shipped these out. If you haven't subscribed, please do. We're trying to get to 10,000 subscribers. I think it'll be the first and only Python on hardware newsletter with 10,000 subscribers. So this week. It's free. Yeah, it's free. No ads, no anything. Don't share your mail address. All those things, I'll get to that in a minute. Latest update to Raspberry Pi OS. If you've been waiting, it's here. Download it. There's a bunch of things that make your Raspberry Pi experience better. The 2023 official Raspberry Pi Handbook is out. You can download it as a PDF. You can also purchase it if you want to support the Raspberry Pi folks. The Weekly Circuit Python Community Help Desk, Help Desk, Help Desk, or Help Desk. Video is out every single Saturday. You can ask your questions. Check it out. If you're looking for kind of like open office hours, I guess that's the thing. Anything that you're looking to do with Circuit Python and you want to have someone help you out with the code. A lot of folks, they do projects and then they deploy them later. The person who did the Burning Man project with Circuit Python, they were able to get all the help they needed and then went off and you know, you don't have connectivity and everything. So a lot of people have experiences not only just sharing code tips, but things like, oh, here's good, best practices for putting a heat shrink on wires. Or just a lot of things. This is more than just code. How to keep desktop of your project. So it's monthly and you can check out more information on the blog. PyCon UK, it's coming up. It's Friday the 16th. It's Sunday the 18th. If there's anything there that we see, we'll do a post. There's usually some interesting stuff at these events. Microdot, a lightweight web server API for Python and MicroPython. And then we go into the projects and more. We had a little bit of news with like how companies are dealing with the chip shortage. We just did our chip shortage radio. And then some of the streams. Deep Dive this week with Tim, Circuit Python Parsec with JP. The Circuit Python show last week was Radimir. This week coming up is Thea Flowers. So if you're interested in really cool synthesizers and your rack stuff, Winter Bloom, that's gonna be a cool interview. And then Project of the Week, this week is Mind Sweeper. It's a game on the PyPortal, Titanic with Circuit Python. Fun. So yeah, if you wanna check that out this there. And then just tons and tons of project news around the web. You can see all the things that people are doing with Circuit Python, with MicroPython, with keyboards. Some of the things, Ann is the editor of the newsletter, definitely dialed into what's going on at NASA because Ann's down in Florida. Kind of interesting, you probably saw this. NASA selects the RISC-5 chip. Yeah, it's just kind of cool. For their ecosystem for future space missions. Which makes sense. It makes sense that they probably want an open core in some way so they can do different things. And then they can like, oh, this is the core we use. And they can grab hard and do what they want to. Yeah, this is the core we use. Like who wants to like make it space, space harden. Post up some of our videos, some of our projects and more. It is a super chunky newsletter. You can sign up on 804Daily. We deliver a Ethereum box every single week. It's spam free, ad free. We don't share your email address. However, this is the tip I'm gonna tell everybody. Because I'm corresponding with someone right now. They think that their email address is used on another newsletter and I'm like, well, it wasn't from us. But I could see why you'd think that. Because everyone in the world shares their email address, everyone lies, everyone's been let down. All there is is suffering online. A lot of it's Twitter, but there's other parts online where people suffer. But everyone's been lied to and let down. So I completely get it. We never take it personal. But one of the things I suggest is if you're using, I think pretty much, unfortunately, it's kind of monopoly with how mail works. But if you're using something like Gmail or something that's based on Gmail, you can always construct an email address. So a lot of people do that. They'll put their name plus Adafruit and then at gmail.com. And that's a good way for you to track because we don't share your email address. And I would also say put a little code and date and everything like that. Because if there was ever a data lake, we'd want to know that too. If anyone yoinked email addresses, we would want to hear about that. But that's a little tip that you could do because I want to make sure everyone knows we don't do that. You have to try really, really hard to get us to send an email. We only do it for orders and stuff like that. So we have a separate site, adafruitdaily.com. And that is this week's Python on hardware. We're an open source hardware company to prove it. We have 2,730 guides. Wow. Lady Aida, what's on the big board? We had actually a lot of guides go live this week. Okay, from now on, Pedro, they did a great guide on how to use and how to access their references of 3D model parts from Adafruit. And they have a GitHub repo and they show the file formats, how to download them, how to use them, and also how to do a pull request. So if you do make models of some Adafruit parts, please submit them. We would love to have them in the repo, but it's a resource, something that we use internally for knowing Pedro make 3D models, projects they want to fit everything in nicely so they have it all modeled out. And they have the silk screen. It looks really cool. And you can use it as well. From Liz Clark, she did an awesome, fun project where she made synthesizer patch cables using the LED nudes, these flexible filament, LED strip thingies. And just using the CV signal or the gate signal actually powers the LED because it's like you put voltage across it. And so by doing some like cool hacking, she makes the, you know, it looks like the cables are lighting up and pulsing with the music. And using stackable cables means you can get signal through via another cable and then the lighting happens via the CV and ground connection. So check out that guide. It's a really easy project. A great beginner project. If you're not a super electrical engineer, you don't want to do any coding. There's no coding required for that project. Okay, got some other guides. Okay, we also got from Katni, the Wi-Fi mailbox notifier. It's a common project. How to make a ESP32 board running circuit Python if you didn't know circuit Python now runs on the classic ESP32 and have it go into a deep sleep mode in between and then wake up when something opens, like a magnetic switch is opened like this mailbox and it will send a message to Adafruit IO and then it can send you an SMS or an email or some other notification. Also track the battery levels to really great IoT project, a very common project people want. They want to be notified when something has been opened. J.P. Dan Pedro also did a massive project called the walk person. It's an MP3 player that's in a tape player shape and it uses our, you know, these cool Cherry MX keys. It uses a display, uses a feather RP2040, plays MP3s with this. It has the amplifier. It can use speakers or headphones. This is an adorable little project I'll put together in circuit Python and also a really great demo of how to use again all those 3D model parts in the Adafruit GitHub repo to make a 3D printed project where everything fits together nicely and comes together so beautifully. Jepler has a bunch of keyboards and he's making them work with circuit Python and they're all a little different. So this week it's a Commodore 16 keyboard which is actually just a raw matrix keyboard and he basically showed how to use a KB2040 and have to turn it into a key map keyboard. And then also don't forget QMK is releasing RP2040 support so you could also update this to use QMK if you'd like. And then finally Liz did a one page update to the Adafruit Macro Pad. A lot of people asked, how do I connect external hardware to the Macro Pad? Can I add Wi-Fi can and Bluetooth? Not really, but you can add sensors and rotary encoders and LEDs and stuff. Check out the extra page on adding external hardware to the Macro Pad guide. Okay, I'm gonna play two videos. One is the walk person, just a little bit of like how it works and then Liz's video about the cool project she just did. In this project, you'll use NUDES flexible LED filaments to make light of visualizers for your CV synths. Synthesizers are like musical circuits. Their sonic qualities are affected by voltages and different waveform shapes that are patched to different modules in the system. The NUDES are soldered to audio jacks with an inline resistor. Then they can light up by plugging into the CV outputs. Different wave forms and voltages can create different light up effects. Gate signals or square waves will make the NUDES blink. LFOs, sine waves and triangle waves will make the NUDES fade on and off like pulse with modulation. The NUDES can't transmit a CV signal, they only visualize them. You can use them with signal multipliers or piggyback cables to integrate with your patches. See how you can build your own glowy noodles by checking out the learn guide at learn.adafruit.com. And it's time for some advanced manufacturing here from the Adafruit factory. And then I'll play a special video that we shot here in New York too, not too long ago. It's 3D printing time. Zip, zip, zip. Yeah. All right, we got two videos. One is gonna be about the part stuff that we're doing. So you can get all your 3D parts so you can make enclosures and more. And then we're gonna do a speedup and then we'll see you on the other side. Oh, there's a skull. You can design custom enclosures for your DIY projects using 3D models from Adafruit. These allow you to create designs that feature accurate measurements so you can get exact dimensions without having to guess or rely on measuring parts with calipers. The 3D models are available to download for free on GitHub, links are in the description. Each part features the product ID so it's easy to search and find exactly what you're looking for. Included are files in open formats such as STAP and STLs but also the original Fusion 360 file. You can also view a GIF or JPEG image of the part to see the model before you download it. If you can't find what you're looking for you can submit a parts request using the issues tab. You can also contribute by submitting your own parts to the repo. Just follow the same naming convention and submit a pull request. For more documentation be sure to check out the guide on learn.adafruit.com. As the YouTube auto captioner said it's really important time. It's every Wednesday 3D Hangouts which is not only 3D Hangouts but really important time with the known pagers so do check that out. All right, let's do some IonMPI. Yes. This week's IonMPI is from ST. Nadia what is this week's new product introduction? That's right, ST micro. This is an interesting new sensor. This is an accelerometer. It's the AIS-25BA. I wanna also mention that this is the automotive version of the LIS-25BA. So there's two versions. They work pretty much the same. And these accelerometers that you configure them with I squared C but the data comes out via TDM. And they're designed to be low noise, high bandwidth. They're triple access. And yeah, it's interesting. Like they basically go up to like basically 4G max. And instead of getting data the way you normally would with an accelerometer where you basically query it over I squared C or SPI and you get the data that way or like maybe it's analog, the data is streamed out for you automatically over a high speed TDM interface where you can clock it at multiple kilohertz and it's designed to go into an audio subsystem which is like, I was like, what's up with that? Like why would such a thing be useful? And this is the data sheet. So this one again, this is the AIS version. It's designed for use in automotive. It's got ultra low noise density. It's a 1.8 volts interface by the way which isn't a big deal, but just FYI. And it's designed to have ultra low frequency response from DC to 2.4 kilohertz. 2.4 kilohertz is kind of like the cutoff where they're expecting you to stream data out of. You control it over I squared C and then of course you get, like I said, TDM output, eight to 24 kilohertz. It's time division. That's TDM sense for time vision multiplex. You're gonna get the X, Y, Z and other data out. So again, what is this useful for? So this is kind of interesting. So the idea behind this is that you would use this for noise reduction, noise cancellation for recording because usually you record with a microphone. And a microphone takes audio waves going through the air and then flexes a thin piezo element or a MAMS element converts it into a capacitive or current or voltage measurement and that's how you get audio out. The problem is that, and just we're doing the show and so this is something we deal with. It's really hard to get only the audio you want without the background noise you don't want. It's like there's a lot of work involved in it. And especially if you're doing automotive, right? We mentioned this is the automotive version. If you're in a car, cars are extremely loud and you're trying to maybe use a voice assistant or you're talking on the phone, you're fighting all this background noise. And what's interesting about this idea that ST, I don't know if they invented it or they just have products for it, but you use the accelerometer to do the vibration detection for the low, the DC zero to again about two kilohertz vibrations. And you use that instead of the microphone. And so you don't end up getting the acoustic noise and you cancel it out. And if there is noise that comes in from the low frequencies of your vibration, you can either add it or remove it or perform some sort of filtering so that you don't get that, especially in those low frequencies is where you're getting a lot of acoustic noises and microphones usually are not as responsive. So yeah, so the idea here is that you still need a microphone. This is not a microphone, but because it's TDM out, you can basically shove it directly into your Kodak, your DSP, your chip, your microcontroller, your microcomputer, perform some basic filtering on it, either like low pass or high pass, add or addition. And use that to get better audio output. And we have a video that we'll show at the end that actually it shows how nice the waveform looks when you remove the audible noise that you would not get through the vibration detection of the LIS or the AIS-25. So the chip is kind of the standard 16 LIS style GPIO, but again, they don't have SPI, instead they have TDM output or input. You put in the bit clock and the M clock for the, sorry, yeah, the word clock and the M clock and the master clock and the B for the bit clock. You control over I-squared, see what data you want out and the formatting, it comes out as 16 bit. TDM, I think up to eight champs I think maybe, yeah, here it shows you, you can decide which frequency range you want, you can set cut-offs, you can do over sampling, whatever. You can get the ODR data XYZ, it comes out as TDM and then your codec is gonna have to take that and then do something with it. But usually once you get it, like if you have a powerful enough back control or my computer, once you get the data in in this like I2S like format, it's very easy for you to perform audio calculations on it. Just mentioning that the X-Lometer is just X-Lometer, it doesn't do the math for you, but it just gets you the data in the format that you can then perform math on. So yeah, you can, sorry, there's six, sorry, there's eight slots I think, there's six slots, you can decide which ones you want on what axis and then again, they have some example code for I think STM microcontroller, if you download it for their dev board, but honestly, I would probably plug this into something like a Raspberry Pi computer, something that can really do the analysis for you and do the filter cut-offs. For the I2C control side, you know, they do have a driver, this is kind of a generic C driver, it's not in Arduino E's, but you can port it to, you know, whatever Linux, STM32, Cube, or whatever microcontroller you're using, and then pipe that TDM data into your microcontroller, sorry, into your microcomputer or your DSP and the best part is, it's in stock. Available with Digi-Key. Yay. That's right. It's in stock. There's 490 at the time of this printing. Yes, there's no eval boards right now, I would have picked up an eval board and I'd try it out, but do check out also, again, the LIS-25, which is the non-automotive version. I think the thing that we, first off, this is interesting because I'd never seen Excel or Omnibut TDM output and I was like, why would you do that? But then once I saw the demo and I read about it, I was like, oh, this makes a lot of sense. It's definitely, you know, as we're seeing, we've talked a lot about AI and audio interfaces. You know, one thing that I've noticed is a lot of companies are trying to get away from having mechanical button and knob interfaces and go with audio interfaces because they're upgradable, they're programmable, they don't get dirty, they don't get loose. You don't have to worry about people looking, you know, you can just speak to your car and say, you know, do X, Y, Z. The problem is that you are, if an audio assistant isn't 99% accurate, it's incredibly annoying. Like they have to be so good or it's very frustrating for people. And it's even not possible because there's humans involved. So I saw that the studies that have come out that it's a better UI for many things to have physical knobs. So I think it's like the middle path is the way, once again, like some stuff makes sense for probably voice control, but some stuff should probably also have a tactical knob. Probably can do a little bit of both. Yeah, that said, you know, and this was definitely, I can sort of tell, like there's a design for some car company that they were like, we want audio interface, but we want to do the noise cancellation from the vibration because it's like, you're driving on a highway and it's just like, but I think it's going to be very useful for other, you know, anyone using recording or voice, especially with, or doing, actually another interesting use case for this would be if you wanted to do like predictive maintenance type projects where it's like you have a device that's vibrating like a compressor, like it's a common thing, the compressor, it starts making a weird noise, right? But then how do you determine what that weird noise is and how do you get the audio in? Using the vibration could be nice because then you won't be affected it won't be affected by outside acoustic noise. So there's a couple of cases, I like the idea of like it streams in as audio, comes in as three, you know, three to nine channels and you tweak it that way. How many elevators they take? Anytime it's about to break down, it always sounds different. That would probably be a good use for that. It's interesting that, you know, we forget that accelerometers and audio are actually measuring the same thing. The surface when one does it in the air. Anyways, sorry, we got a video. Check out this very cool demo which I like that they had audacity so you can really see the effects of the LIS-25. It's recorded by the accelerometer and the audio is recorded by the onboard microphone. In this PC GUI you see the individual path of each of the sensors which is the microphone on the top you see in time and frequency and then the accelerometer in time and frequency. What we are going to do in order to deploy this system is we are going to take the lower portion of the spectrum up to two kilohertz from the accelerometer and the higher portion of the spectrum from the microphone, as you can see in these two diagrams. We are going to combine them into a single audio signal where acoustic gains of the two sensors have been equalized and recombined them into the output that gets generated as output of the system. So now let's try to record the audio coming from the demo. So we turn on this recording system where we see two channels actually. One represents the audio as recorded by the single microphone another one represents the audio recorded by a combination of microphone and accelerometer. So let's try to listen to each one of these recordings to understand the improvement in quality. I'm going to split the two signals into individual tracks so that we can listen back to them. Now if I turn on this bottom track and I play it back from the loudspeaker you can hear a very disturbed audio that represents what you would get using just a microphone with no further processing. If we listen to the other track we can hear the output of the actual system which is clear voice with no of the noise you were hearing previously. Okay, we're good. Set up for new products here. Is that a red line on the screen? I do not know, it just appeared. Alright, I think it was... So let's do the code. Codes wireless LEDs. And it's new product time. New, new, new, new, new, new, new, new, new, new, new. Thank you for fixing my overhead camera. Yeah, I think what happened was it has a drawing feature. Oh no. And I think you were drawing on it. Well, I think the cable was draped over it. I think you were drawing on it. Okay. Okay, sorry. Whatever. But it's a business. Okay, so we've got these magnetic, actually last week we put in these really cool magnetic tip cables, they're data and power. And on one hand they've got, on one end they've got the USB-A, USB-C on the other end you can have adjustable different tips. And so last week we got the USB-C tip in. This week we got the micro USB and the iOS Lightning, which I will show as well as this wonderful demo. Again, it goes either way, it's USB-C and you pick different tips. And what I thought was nice about this is you could have one cable, different connectors and like these, I'll tell you, like I've tried other ones and there was a reason we haven't carried these until now is they were always like never that great. But they're much, much better now and I actually really like this cable and I like these tips. So let's go to the overhead real fast. Okay. And I will show it off. The newly refreshed overhead. The newly refreshed overhead. So this is the cable. So we showed this off last week and it will lock. So it's type C if you want, if you have a USB-C connector, you have a MacBook type A if you are on a Windows computer like me. And then I'm going to plug this into my little extension cord here. One thing I like it has a little power LED tells you that it's lit up. It does data and power. This is the micro USB. It works great. Or if you want the USB-C tip, it comes with a tip USB-C but it also, there they go. This is going to the demo. I'm going to show later USB-C demo and then you've also of course got a lightning connector which I forgot my iPad is dead. But if it was not dead, it would be charged. I left it unfortunately for a couple days. But the tip does work. Yeah, I'll turn on in a second if you like that. Oh yeah see it's like hi, why did you do that? Now we really could tell it works. Now it's really upset. It's like you please plug that back in. Someone will let this charge. That's one of the things. A lot of times there's interesting stuff out there but we have to test it all and a lot of it doesn't work. And so we're only willing to stock and support the things that we've tested and then we've also been using these for a while and kind of went through all its paces. Yeah and I like this. This got like a nice woven cable and it's got the USB-C or A at the end. And it's nice that you can get extra tips and plug it in. I find this useful because I don't want to have to plug in all the things at once but I do need to switch between all these different kinds of cables all the time. Yep. Okay next up. Yep. Okay next up. I got this for knowing Pedro's project but the project got finished before the cables came in. This is a USB3 to SATA adapter. Basically you know every time there's a new Raspberry Pi people are like hey why haven't you added SATA connectors? It's like well because they didn't. It's very small, it's a $35 computer. But if you want to add SATA it's really easy. This cable gives you the SATA power and data on the ends and it has a USB-A 3.0 on the other so it goes like I think it's like 6 gigabit per second speed. You know I do have it plugged in here into a large laptop. I will say USB-A is only really good for like about an amp so it's best used with SSDs not necessarily a or a laptop drive. I happen to have only this really big old Western digital. I'm actually... Jonk. Where do we shoot this photo? Because it's honestly should be an SSD. I don't want to promise that it works for these gigantic old disk drives. By the way this is not included if you buy it. And the disk drives are not included. Yeah. Okay. So yeah this is very handy and then of course check out knowing Pedro's awesome guide on how to turn a Raspberry Pi or other single board computer into a multimedia server for your home. Okay. Next up. We've got from MonkMakes our favorite... one of our favorite British makers. We have no favorites. They're all our favorites. That's favorites for the you. MonkMakes makes adorable electronics for micro bit but also for micro Python and Arduino in general. This is designed for the micro bit and it's got a humidity and temperature sensor and a moisture sensor and RGB LED and it's designed to make gardening projects and sensing projects really easy. It's low cost. It's very affordable. Pair it with a micro bit or just use alligator clips to clip it on to your favorite micro controller circuit Python, a clue, what have you, a Pico. There's header solder on the back and there's no solder required and he's got a whole bunch of code as well. So check out that and all the other great MonkMakes products. And these are all of the wireless LEDs. Oh, that's the code. This is the Badanza. Yes. Tonight at cornucopia. I'm sorry, I have to set this up because... Yeah, I'm going to show all these videos that we did. They did a good job. So we already had the... People were like, wait, you already have the wireless LEDs in the store? Yes. But we didn't have the big ones and people wanted the big Berthas. So there's two sizes of wireless LEDs and I will actually admit at first I did not realize that there was multiple sizes but if you look at this photo... Yeah. And just by the way, if you go to our site, there's a selection page where you can do this. So you want to show the... Yeah. So on the right there's the small inductor and on the left is the large one. So we've had the small ones in stock but the way the inductive chargers work of course is we've got the big ring that forms the primary and these coils form the secondary. The magnetic field passes through the coil and charges up the LEDs. And if you're using the small ring you pretty much have to be right there but what's nice is if you have the big ring and the large wireless LEDs they can work as far as like 30-ish centimeters away. The red LEDs are particularly dim but some of the white LEDs and I think the green ones in particular are very responsive. Yeah, let's show them the overhead. They come in packs of 10. I love doing the demo for these because... What's great is you don't have to take them out of the bag. I don't have to take them out of the bag and like lose them. They're right here. So of course the best transmission you're going to get is when they're coaxial which means that the ring is in the center but close to the middle not on the outside of the ring. Put this on my hand here. Isn't this neat? It's magical by the way. But it will always work best if it's coaxial so like yes sticking up and then lift your hand up so you can get about 10 maybe up to 6 10 inches away. It's still lit. It does get dimmer and then it stops. So we did a couple of measurements so each one has the using the big ring at 24 volts how far away it will work with white and blue and the colors do act a little differently. Another thing we learned is not all the colors work at the same distances so red in particular I think gets dimmer a little earlier than the green so there you go. So you got the large ones, you got the small ones of course the larger ones work at farther distances but they are larger so you'll need to be, you know you can't fit them into his tiny spots but that said we have all the different colors so choose your favorite color and your favorite size. Yeah, and you can go to the one page destination on our site if you want to and then don't forget you need the coil as well but one coil can power all the different sizes of LEDs as you see here. Okay, by popular question finally getting to some more iSpy boards there's just been so many revisions and hold on, I actually had the demo and then of course I went away so the, you know I'm going to use this magnetic cable Did I hit the, no this, sorry No. Okay, thank you so this is the iSpy breakout board so all of our displays that we've been making lately you know people have said like wow you know the quick STEMIQT stuff for iSquared C has been awesome because it makes it so easy to plug in iSquared C sensors, no soldering you get power ground data clock wouldn't be cool if you did the same thing for displays and so the idea here is you can't use just wires because you need a lot of pins for displays because there's you know the SPI and the SD card and the touch screen and the memory and reset and backlight so basically it's 18 pins and if you look on like this image you'll see our 1.9 display which I'm also going to demo has a latchy connector on it if you use this flex cable and you can use a very long flex cable because flex cables are pretty good at high frequency data passing you can then easily wire up displays that are not right next to your screen so you know normally I'd have solder and wire and plug it all in but this is actually just plugged in via this flex connector and I'll just show I'll just connect with my magnetic USB cable and then I'll show it's really easy to insert this cable in we have these in various lengths from short, medium, long and you can of course get flex cables very easily in other lengths and then this is just a break it because you're like okay well I've got the cable I still have to wire it up on the other side but this way it's like you don't have to pass long cables for the data there's also another issue people are having where they're like why am I not able to pass the 80 megahertz clock data so quickly through my jangly wires it's like well you got jangly wires this way you've got nice short breadboard wires and they go into the cable and the cable can snake out and then you can mount this wherever you like it's about cables hanging out it's a much neater collection of course we'll have a little add-ons that are designed for feather wings and raspberry pi but we don't want to start with the breakout board version okie dokie and then the stars issue tonight besides you lady our community, our customers, our staff everyone here in data for to make things go community this wonderful world is we just did that one now it's this one yay the LTR 329 and LTR 330 this is a 2 in 1 these are very similar sensors just one second I'm going to grab the magnetic cable for the microbe well it's ok they all look the same we just got out of order this week we should do a magnetic stem as one now well we have those magnetic connectors ok these are kind of blending in the one right now 610 and then 5.5 so the LTR 303 and LTR 329 are both light on iSquared C digital sensors they're good up to 64 kilo lux they both have adjustable gains and they have different integration rates and they're just really nice little light sensors and they're very inexpensive and here's just the demo showing there's a lot going on here the sensors have visible plus IR and then infrared diodes inside there's two channels and then when you cover them up it goes down you can change the gain it's up to 16 bits depending on how bright you want it you can adjust the gain to give you a good range they both have stem and QT connectors the drivers actually live in the same libraries we have Arduino and circuit python so you can use it with any Arduino board you can use it with a Raspberry Pi single board computer desktop with a FT232H etc the 329 is the simplest version and then the 303 let's explain why I have both so originally I wanted to do the 329 because I was going to use it for a project and I thought let's make a breakout the 303 is basically the same sensor but it has an interrupt pin and like you it really is just not connected on the 329 it only exists on the 303 do you need the interrupt pin if you don't go with the 329 if you do go with the 303 it's basically the same on the back you can cut the trace to get rid of the green LED they only have one I2C address that said there is no simpler, easier, smaller light sensor that we found especially if you're going to we got this to replace an analog light sensor and we want it to be extremely compact this one is definitely smaller than the BH1750 it's smaller than the Vemmel770 for sure which is huge and chunky and the code is very easy to use and it's a very simple interface but it kind of does everything you want so you have two nice simple light sensors great for everyday visible infrared and then you subtract them to get just visible light sensing and then if you want threshold interrupt support check out the 303 all right and that is new privacy new new new new okay don't forget to code wireless LEDs because we had this wireless LED yeah we got a lot of that going on this week okay we had a lot going on, I couldn't do top secret this week we're gonna go straight to the questions I have some lined up go over to discordadoferit.it or discord we're gonna answer some questions First up, one more, just to confirm, are these data and power? They are data and power. Data and power. Data and power. Cool. I know, it's confusing, but they are data and power. Yeah. Now they don't have all the extra super mega special USB-C kids, but they absolutely will do 2.0. Yep. Okay. I'm working with something that will need to measure the temperature of wax. It will be embedded in the wax while solid and melted is there a temperature sensor that would be able to put up with that environment? Well, here's the good news. That's actually not that hot. I mean, it's hot, but it's not like crazy hot. Now there are the, we have the high temperature DS18B20s in the store. I think those go up to 125C. So basically if it's below boiling, which I think wax is, try that. That's definitely the easiest because there's DS18B20 code everywhere. If that won't work for you, we definitely have the K-type thermocouples with the stainless steel tip. That will also do the job. They don't go up to like, you know, 600 degrees C. But honestly, you know, the cheapest, easiest thing is just to use the high temp DS18B20s if you don't need more than 125C. For the selective solder, is it, would it be better to leave the dross floating on the surface as an insulator and oxygen bear or do you have to strip it off? No, it'll clog the pump. So you have to clean it off. I mean, there's always a little bit, but you don't want it to be like super crusty. Okay. So what's your first op amp? Oh boy. The LMC6542 is the, that was kind of my first op amp. I got totally spoiled, you know, because I was in the lab and I think it was the LMC6542 or something like that. Of course, everybody loves the, what is it, the TL, 084, 082, you know, that's ... It's like TL074 is in there. Yeah, the 84, the 82, I think are good. Yeah. I think the thing about the LMC65 that was really sweet was it was real to real input and output and it completely spoiled me because it's like, I had this in my lab kid and I'm like, well, these are ideal op amps, everything's ideal op amp and then you go into the real world and you're like, wait a minute, what do you mean it's not high bandwidth and high gain bandwidth and real to real input, totally internally compensated, ultra stable. Yeah. They're like three or four bucks a piece. Very nice op amps. Okay. That pretty font thing that we were showing off on show and tell. Philby's, yeah. Yeah. So what is that and where will that eventually be for people to try out? Well, it's like, it just got ready for me to look at so it's not quite public. I want to try it out and then we will, of course, publish it, open source but the idea is I just felt so bad asking Philby to just do silkscreens for a little break out and I was, I've been doing a lot of little breakouts over and I'm kind of been tweaking and revising them a little bit to tweak the manufacturability and I was like, I'd love to update the silkscreen but I don't want to have Philby have to draw for each one so I said, hey, can we somehow have it auto generate and he just totally went above and beyond and it automatically updates and it's the same layout and the same location and it's crazy. Can you use a light center with an Arduino UNO? You can. Absolutely. It's a great, it's a great choice because it's a very lightweight sensor. Okay. And a little bit of a follow up from that wax question could use PWM with Arduino somehow control a NICROM wire temp, sorry, I'm new to all this and there's a steep larynx curve. Is that a way to do it? Yeah, you can. NICROM wire is, I don't think it's inductive because it's not going to be a coil but it's a heater. It's a very low, it's basically an extremely low resistance, right? It's like 0.2 ohms. So you need a very powerful transistor like a tip 120 or similar. It's going to basically be like a PWM like a motor and that's how you would do the temperature adjustment. So just be careful, don't burn yourself. And then whatever transistor you used, you know, maybe an N-channel MOSFET would have the lowest heat dissipation. It's PWM at one kilohertz, probably work great. Okay. How do you construct a wireless LED with curled wire to be powered from inductive high voltage power lines? I mean, don't. I mean, basically, you know, yeah, I mean, don't do that, but I think, how do they run it? Like, I don't know what frequency they run at, five kilohertz. I mean, I guess, I guess you could. You'd have to get really close, probably closer than you'd want to be. Just use this coil. It's a 24 volts. It's nice and safe. Yeah. Save that project from Burning Man. Yes, please. Stay safe. Okay. Do not. I mean, if you want to grab a 10s unit and see if it works with this, like go to town. I mean, like somebody will do some really cool, not safe work art with it, and that's awesome. Yeah. I'm happy for you. We're fans. We just can't endorse. Yes. Dangerous stuff. Okay. And with that, are there questions this week? Okay. Thanks, everybody. Oh, Kidoki. So don't forget the code is wireless LEDs. Thank you so much. Everybody don't forget you get free stuff on the way out when you check out and, you know, pick up some of these and more. And, you know, what does the money go to when you buy stuff from us? It pays people. Great living wage is 401Ks, health benefits, open source code, automatic eagle font converters. Yeah. Somebody had to spend a week writing that. 2,730 guides. So that's what we do. LTR 329 libraries. No loans or venture capital. We're still, I think, one of the only independent electronic companies doing this thing out there. We don't do ads or harvest your info or do any of the things like that. I mean, I have to spend a lot of money on hair dye. It's all that hair dye. We're saying like my $60,000 pick hair dye. Somebody please help me budget. Yeah. Your family is starving. And we're going to keep at this because we got cool customers and we very much appreciate all of you. Also, thanks to Jesse May behind the scenes tonight helping out. We'll see everybody next week. We're going to do a moment of zener. This has been an Adafruit production and I'm going to play some music on the way out. Thanks everybody. All right, buddy.