 What is this Pedro? Hey everybody, this is the Adafruit Show and Tell. This is the best place to show off your awesome DIY projects, whether it be like PCBs or projects, like with 3D printing or wearables, or if you're taking us on a tour of your awesome workspace, everything is game. I will be posting the link on adafruit.com slash, I'm sorry, discord.gg slash adafruit to get the link and you can join in and show off your awesome project. We're gonna take about 30 minutes to check out everybody's project. Think about a minute or two to show off your stuff and just give us the elevator pitch of what you're working on. We're gonna go ahead and start off with Stefan. Let's go ahead and see. Oh, actually no, sorry. Everything got all mixed up in the order. Let's go ahead and start off with John. Okay. Hey, Jayden. Hey guys, how's it going? Hey, that's good. What's going on? Are you here to show off today? So I'm gonna be showing tomorrow a project of my show on the workshop show where I'm gonna look at these really cool little inductive powered LEDs. So here I've got a little setup with a welding mini fig, little Lego guy. You can see I've got some nice lighting here and the cool thing is that no batteries required and no wiring. So this is just kind of free floating LEDs and I've just set them on my little welder guy's work bench there and you can see if I cover up my light source there but you can see a little better. And so I'm gonna show the little sort of display stand that I've built here. We'll be working on that to hide the inductive coils that are used to give us lighting in any orientation. So pretty much anywhere you go, you're gonna get these to light up. And I also have a tabletop miniature that my friend Brian lent me that's a familiar one to friends of Mandalorian. And I have a little red ones in the thrusters there so we'll be playing around with some lighting for models which these things are incredible for that. Really cool innovation to be able to light up small stuff without wiring anything and without worrying about batteries. How freaking cool, yeah. Tomorrow. We gotta figure out ways to like incorporate this into some sort of interior design in the house somewhere. This is freaking cool. So you have like two of them, right? One that's like vertical and one that's underneath? Yeah, and it's actually not necessarily required depending on the orientation of things but since I wanted to have some stuff planar to the ground and some other stuff planar to the wall, it's helpful in that case to use a couple of coils but you could also find creative ways to be sort of diagonal and especially with these larger coils you can see here they're happy to light at a lot of angles and at pretty great distances as you remember. So there's a smaller one. I haven't played around with it yet. That's this little coil here. The coil I'm using in here is about eight inch diameter. These little ones are lower voltage and smaller range but also a lot tinier. So can be for different types of little models that you'll build. How cool. So this will be on the tomorrow show. Yeah, you should have one. Workshop show on tomorrow. It's Thursday at four o'clock Eastern. So come on by and we'll stay around with models. Yay, thanks so much, Jimmy. Thanks, Jimmy. See you guys. All right, next up we're gonna talk with Brian from Digi-Key. All right, Brian. Here we go. Hey, Brian. Hello. Howdy. Hey, guys. Hey. Let me add your screen here, Brian. There we go. They got some cool sensor stuff to show off. Right. Let's see if I can learn how to navigate. I can't see that at the same time because this is a... I don't know, yes. Is it zooming in for you? It is. It's coming in clearly. Excellent. All right. So this is a water sensor. This has saved me, I'm not sure how much money. I think I could tell you how much it would have saved us about $80,000 in kitchen repairs. We had a main drain in our basement back up. Oh no. Because of tree roots. Oh geez. And when you find two inches of questionable water in your basement. Yeah. I was suddenly motivated to create a water sensor that I wanted to make it as simple as possible and draw as little power as possible so that you could battery power it and pretty much forget about it. So the basic elements here are just a dirt, cheap, simple MOSFET. This is a two-end 7000, a 10 meg pull down to keep the gate low. And for those unfamiliar with MOSFETs, just it's just gonna act like an on-off switch. And because it doesn't really draw anything when it's sitting in one state or the other as far as like here when it's turned, when it's pulled low, it draws next to nothing. I can't even measure it with a six-digit bench DMM. The noise in the room is the same whether you hook it up or not. So we've got a battery here, got a nine-volt battery. And then this is your terminal here that you just hook up your two wires and run that wherever you anticipate water misbehaving. Okay. I found out that you can kill a MOSFET pretty easy by exposing the gate to a little bit of static. Once it's in place, you're pretty solid, but something as simple as adding a one nanofarad capacitor to the gate, slowed that rise time enough that I have yet to kill one just by adding that. It's not your normal transient voltage compressor, but it works. Nice. By using a pulsing buzzer, that's just human interaction stuff that a constant tone doesn't grab your attention nearly like something that turns off and on, especially if you've been to McDonald's or anywhere that, you know, hey, the machine's yelling at you. Yeah. Then I took it one more notch and this is an elective thing. Normally you just pull the battery. If you've got a nine-volt, it's just hanging there. But my wife didn't like that idea. She was always afraid she was gonna wreck something. So I put it in the case and then put a simple alternating, I think you can see the part down here, just a simple push button switch that click it once, it's off, click it again, it's on, and it's just switching back and forth. So, well, I shouldn't say off and on, but it takes the power away from the buzzer, runs it through a self-flashing LED, which these things come in early handy. And then it's reminding you, hey, you turned it off, dude. Yeah. So you click it again, you're back in action. That's awesome, I love it. By using a lithium battery, you're good for, I mean, their shelf life is like 10 years. Wow. They're expensive, but compared to water in the wrong spot. Dude, yeah, it's a fraction. Yeah, I love that you have everything laid out here so people can just re-watch the video and I think those are all the product ID numbers on DigiKey, right? Correct, yep. Awesome, yes. I could always share the URL. We're using Schemit, the built-in diagramming tool that we have on our site. Oh, awesome, yeah, beautiful plug for that, yeah, awesome. If you want, I can show you a quick picture of it in action. Oh, yeah, I'll bring it in. Let's see, share screen, sorry, my first time. I'm sorry, you're good. Here we go. It pops up somewhere, there it is. So here, this is one that I didn't, let me see if I can zoom in here. So I just did bug that thing. Nice, nice. It works. That one I ran a Xenar across instead for a transient voltage suppressor and that one sits underneath our sink, as you can see. And the second pair of wires coming off, that actually goes underneath our dishwasher and that saved us twice. Wow. We've got two bare wires snaked around underneath it and so we had a leak a couple of times, otherwise you would only find out after having the obvious amounts of water leak through the floor and into the basement. Yes, dude, I want to build like, I don't know, like what six of these for like each bathroom and like have them like just everywhere like in the back because we're like, no, you want to hear just in case, like the earlier the better. Yeah, it's like insurance here. Yeah, I wonder if our weight would go down if we told them we had these. Excellent, excellent project, Brian. This is fantastic. Ah, cannot recommend people go check this out enough. Holy crap, this is great. Thank you so much. Thanks, Brian. Take care, Chris. Thanks. All right, next up we're going to check in with Melissa. All right, Melissa. Hey, Melissa. Hello, hi. Hey, so I have this little gadget that I'm working on here. It's just a little terminal thing with a little seven inch LCD attached to a Raspberry Pi. And I have it running a little animated GIF player here and I have it. So now if I go ahead and I turn this little knob on the back here that I have, I can get it to kind of play or I can go backwards if I want to. Nice. And then I can click it and I can go to like the next one. And I click it again and it'll go to the next one here. I only have like three on here so that it'll play to the original one. Choices. All cats. Yeah. Anyways, so I'm writing a guide on this right now and that should be out either later this week or next week. And there's actually going to be another way I'm going to be doing it, but it'll be the same sort of thing. Awesome. And this is the code you already committed to GitHub, I believe. No, I haven't yet. Oh, okay. Soon. Coming soon. Yeah. Awesome. Thanks so much. Thanks, Melissa. Yeah. Thank you. All right. Next up, we're going to check in with Scott. All right, Scott. Hey. Hey. And Scott's screen. Can you hear me? Yes. We can hear you. We can see your pretty PCB. Yeah. I like how you were speaking from experience with water damage. Oh my gosh. We saw a neighbor go through that and it's just like really rough. So he said, yeah, just walking around. Like all of these are like vacation rentals and they don't notice. And we have to like call their management company and be like, dude, your roof's leaking. I see your water heater thingy is like the roof's now. But yeah. That is, again, awesome plug for Digikeez. All the products you can do to build your own, yeah. 100%. Yeah. So what I've been working on is I'm trying to, I'm diving into the Raspberry Pi. Not the Pico, not the RP2040, but like what people think of when they think of Raspberry Pi. I've been doing some, so what I'm trying to do is bring, ultimately I want to bring CircuitPython bare metal to the Raspberry Pi 4 so that it will act like CircuitPython, but particularly have the ability to do display IO on HDMI. And it'll simplify it a bunch too because it will just act like CircuitPython still. So I've been trying to like learn my way around the Cortex-A series CPUs on these chips. They're meant for OS Linux class stuff, so they're a lot more complicated. And one thing that I wanted was I wanted to be able to attach a debugger to it. And there's no Raspberry Pi boards that I know of where they just have a plug for it. But luckily on the 40 pin header, they've broken out the pins that you need. So I whipped up this board and I sent it out to Osh Park yesterday. And basically what it is is it's got auto, it wires up the debug headers. That's the big thing in the middle and the smaller thing on the left hand side. Those are just like two form factors for the same plug. It's got four LEDs at the bottom so that if you're doing debugging by LED, you can have LEDs that you can blink. On the top left side is just a header that you can use like a USB to serial converter on. So that'll get you your serial output. That's the default. And then because I had the room and the I squared C pins were right there, I threw a STEMI QT on there as well. Sweet. I'm a software person so I don't really like having like jumper wires everywhere. So I kind of like running PCBs like this, doing PCBs like this just to make it like, so you can unplug it and plug it back in or like switch stuff around. It's yeah, it's super handy. Yeah, so I'm excited to get that right now. I have all the wires going everywhere. But yeah, if folks have experience in Raspberry Pi bare metal, feel free to ping me. It doesn't work yet. So I can only use an extra set of eyes. Awesome. All right, cool. Sleep peak coming soon. I think you'll touch up a little bit on this on your stream on Friday. Yep, that's the plan. Yeah, we'll continue working on it. Definitely made some good progress since the stream last week too. Awesome. And, oh wait, no, I can't talk about it. I can't wait to try that thing that, wait, I don't know if that's, I don't know if we can talk about it. Soon. I'm like so hyped about all the stuff you guys are all working on. Yeah, the BLE workflow stuff. Yeah. Yes. Ah. All right. Let's cut to someone else first, please. Which is, well, which is why I was like, maybe knowing Pedro would be willing to help test it. Yeah, that's my gosh. That'll be good. Awesome. Thanks so much, Scott. Cool. Yeah, thank you. All right, have a good one. Bye. OK, next up, we're going to jump in with some folks from the community. First up, we have Stefan. Stefan. Hey. Hey, hello. Hey. So you got some cool cases to show off? No, no cases yet. They are still in the making. So we're at at Home Assistant. We are working on a board, a custom board for Home Assistant. It's a Raspberry Pi carrier. Raspberry Pi compute module carrier board. That's basically what you can see here. There we go. I see it's up. Yep, it's up here. Hey. It looks cool. Yeah, so I mean, it's quite straightforward. We made it with KeyCat, obviously. And it has an M.2 connector. So we can actually hook up NVMe. So we have really a lot of storage. Then we also put on this SIGP module, which allows us to talk to devices. And furthermore, we also have PoE. So this device is actually running. It's hooked up to Isabel. It's running, and it's actually controlling that bulk. Hey, awesome. So yeah, it's working. But with hardware, if you want to get it out to people's hands, you need to test it. And you need to get it in volume. And production is expensive and so on. So that's why we actually started a crowdfunding campaign on CrowdSupply. And so if you want to get your hands on one of these at one point, go check it out. It's on homedashassistant.io slash amber. And you get redirected to crowdfunding or just crowd supply, or just go to crowd supply. You should see it there. Sweet. Yeah. I think what is kind of cool also to show, I mean, Home Assistant is open source software, right? And we're a lot about kind of privacy first, and also open source hardware. So this will be open source as well. And so we're really trying to kind of making the full stack, basically, from software down to hardware. And I think it's quite exciting. Cool. Yeah, definitely post a link in the chat. Definitely check it out. Yeah, I will do. One thing which I think is cool for especially for hardware hackers, maybe, if you want to dive into SIGPi. So the SIGPi module we have on here is from Silicon Labs. And it's a Cortex M33. The firmware, of course, is kind of, it's from Silicon Labs, so we cannot do much with it. It's not open source. It's what we get from them. But it's a Cortex M33. So you can actually debug it. We left on the debug pin headers there. And we even hooked it up through SIGPi to the Compute Module 4. So yeah, I mean, it's kind of open to get hacked. Yeah. Awesome. Thanks so much, Stefan. Thank you. Welcome. All right, cheers. OK, next up, we're going to talk with Liz. Hey, Liz. Hey. Hey. How's it going? It's good. So this is a project we're working on with you guys. This is Liz. I brought on last week I had literally gotten the code working like 10 minutes before show until it started. So basically what this is, this is the RGB matrix stemmer board hooked up to a feather sense. And so the feather sense microphone is taking in audio data and then it's visualizing it into the LEDs using the micro lab library. And so I was playing around with different color gradients this week. It's kind of hard to get show on webcam, but I think until like when I'm talking, like you're getting more green happening. And so the gradient would kind of settle on it's like more of like a kind of a brighter kind of rave rainbow because it shows a little bit more contrast. And I think if I hold it up, you can kind of switch my camera. You can see it a little bit better, too. So yeah, it's like reacting and stuff. So I think there's been some updates to the library recently as well. Yeah, yeah, it literally is like your name. Yeah, it's wild. So cool. Yeah, so something we're working on. Cool. Let's remind me of that. What was that mask? I forget what artist it was. It was Lady Gaga. I like that mask. Did the visualizer right on the small cute pocketable version? Yeah, that's so cool. There you go. Cool. All right. Great progress, Liz. Yeah, thank you so much. All right. We'll talk to you later. Thank you. All right. Next up, we're going to jump in and chat with Mark Kembler. Hey, Mark. Hey, Mark. And Mark Screen. Yeah. Oh, us. So I know people like seeing works in progress, and it's really good because in Discord right now, we're just talking about who started as software hardware. I definitely started as a software developer. I was interested in hardware, but Circuit Python really got me into the whole world a lot more. So this is now my design for an idea that came out to show and tell, actually, of a smaller version, in some ways, of the Fun House. And this is the first board I've ever designed with an actual microcontroller on it. So there was some discussion. I have to give credit to Dr. in Discord. He gave me a lot of good ideas on what features he'd like to see in this type of board. But to be able to have a Wi-Fi-enabled board just anywhere in your house and quickly plug-in sensors through StemicQT and report it to Adafruit.io, so there's lots of boards that you can use for that. But I thought, well, can I add in some features? What would you want in an all-in-one board so you're not having to combine a few things? So I don't actually have a lot of 3D parts, but there's a buzzer, LEDs, well, a couple of the switches like Reset and Boot, but just a general-purpose switch as well. Just so then you could take one of these things, plug-in whatever sensor you want, or you chain several of them together, and plug it in wherever in your house you need. Right now it is only USB-powered, though. That's the only downside. I think that's good. Yeah. Which micros is based off of the USB? This will be the ESP32S2, the same one that's in the FunHouse and the MagTag. It was actually one of the first ports that I did port-specific code on Circuit Python 4, so I was a little bit more familiar with that, and had read the 600-page manual for. Oh, jeez. Yeah, that's another fun lesson I learned in all this is the length of some of these microcontroller manuals. Yeah, it's crazy. Oh, this is excellent progress so far. I think attaching a water sensor, I think, through the stem on it, it's definitely going to be a goal. I, when I bought my house, the basement had just been redone because of the hot water tank going. So it hasn't been my problem, but I've owned my house for a while now, so I should probably put one down now. You don't want it to be your problem. This is a good insurance policy. That's what you're really building. Thanks so much. Yeah, thanks a lot. Please come by next time with some more partners. Hopefully I'll have a manufactured board soon. Yeah. Oh, all right. Can't wait. Thanks, Mark. Thanks. Check you next time. All right, next up. Gustav. Gustav. Sorry, Mark. We'll come with you in a little bit later. Gustav, right here. When people jump out, I think it moves around. I didn't recognize myself there for a second. Oh, that's his. My mistake. Hi, so I was on the show until like a month ago, and I showed off I'd taken a circuit playground and turned into remote control for my board game web app and then communicating web Bluetooth. OK. So the idea was you're going to pass that around. But then I figured I wanted to run wires so that every player could have a button where they're sitting. So I showed that. I'm going to have to move my thing around a little bit. Let's see if this is visible. Yep. Right. So the first thing you probably notice is that I have baby bells here. Now I'm hungry. Yeah, I know. Baby bells are amazing capacitive touch buttons because I can pick them up by the red piece and it's not going to detect the touch. But if I touch the cheese, then it's activated. So I'm just going to activate the game time here. So the idea is simple. When the blue player is done, he just touches the cheese and it goes over to the green player, Ledi, who can then touch his cheese and that's simple enough. But my game time I have kind of a need for two buttons. One button for ending your turn and another button for passing the round. So how would I do that with a capacitive touch? Well, I just programmed it so that if I. Yeah, next up, Ledi. So if I just press and hold for like two seconds, I have a little timer thing so that it figures out that that was a long touch. And I guess you could do similar things with like double tap and whatever you want. But I just need two buttons from one capacitive touch sensor. So that's that. Awesome. And then when the game is done, I guess the winner gets to eat all the cheese. I love that. That would definitely be the point. I think that's the prize. Yeah. The thing that I'm a little bit confused about is if I run it off battery power, so it's not connected to like a sink or ground or anything, that capacitive touch seems to not work so well unless I run a wire from ground to one of the ground ports on the thing. So if someone can explain why that is, maybe something in Discord. Something in Discord because I'm working on it. Cool. Thanks a lot, Gustav. Bye. Bye. And now I need some cheese. Not before Mark. Hey, Mark. Hello, Mark. Hey, guys. How you doing today? Hey, how are you doing? Good. The amount of attention-seeking behavior I've been exhibiting on the other side of the string yard has just been insane. So thank you for taking me. Hey, I run a site for some sponsors called Teach Me a PCB. So all you people out there who are looking at these PCBs and you want to learn how to make one yourself, we're going to teach you. And this year's project is a keyboard based off of some of JP's work. So this is the one you can get off of a Pimeroni. We're making our own. This will be the demo. It just came in about 30 minutes ago. I obviously don't have time to solder it and populate it, but this is just the demo. You get to design your own. And we're giving away a lot of the parts you need. 25 lucky participants. You're going to get everything they need. This is nothing. This is a real leader I was using for attention. So visit Teach Me a PCB. Sign up. We're going to start October 11th. You only need to devote about two to three hours per week. I've got hooks into manufacturers, the same people that make the Osh Park boards are making ours. Did you key sponsored? Last year we were able to give away a nice key site oscilloscope, all TM licenses, all sorts of fun stuff. 100% free. We're not selling your information or anything. The only gig is that you have to look at the sponsor logos whenever you log on to the site. That sticks to the advertising. How cool. I like how you had everything on like a bandolier. It's like, yeah, dude, that is like the modern day, like Rambo, dude, that's so awesome. That's what I was going for Rambo. Yeah, it's a good costume, I think. But only like certain people would know what that is. How cool. Thanks so much for the plug. I'm trying to put it all over LinkedIn. If you know any aspiring engineers, engineers in the pipeline, that's really who we're targeting. But anybody who is motivated, if you can breadboard, I'm trying to provide you enough information to complete the course. Last year we had like 600 engineers sign up. We even had like a 10th grader. We did a competition. He came in second, a 10th grader. He's going to have my job if he ever figures out what my job is. Oh, no, that's not bad. So thank you so much for your time, gentlemen. And thank you for my attention seeking behavior. All right, Mark, have a good one. Thank you so much. Bye, guys. All right, everybody, thank you so much for coming in. We ended just in time. Don't leave yet because in just about two minutes we'll have Lamar and Phil, Mr. Lediada. We'll come on and do a full hour of open source hardware. All that and all the cool new things coming out. So stay tuned. All right, folks, that's it. We'll see you guys next week. Bye, bye.