 life in New York it's ask an engineer everybody and welcome to ask engineer it's me lady at the engineer with even pinker hair we'd be mr. lady at a on camera control we've got a jam packed show for you tonight lots of new products some psychedelic art codes for discounts and more let's kick it with the code and what's on tonight's show because set screen 10% off and native restart all the way up to 15 am user to lose it you also get free stuff along the way maybe it'll talk about that in just a few moments so i've got some of our live shows including show and tell some desk of lady at a great search kp's product pick of the week help wanted we're hiring here in new york talk about that briefly we've got some advanced manufacturing main york city factory footage 3d printing cool video and a speed up we've got iron and pi this week it's an xp next period brought to you by digi key um do you have any top secret this week now all right now i think we're just gonna show a lot of screens new products questions we do those questions over on discord at fruit.it slash discord check it out sorry answer you can also go to discord.gg forward slash aid for it all that and more on you guessed it ask an engineer okay okay so the discount code being touchscreen you'll get free stuff lady what do they get for free okay yes we still have all of our freebies it's wonderful to have so many freebies that during the shortage was a little bit struggle but uh 99 dollars or more when you buy in the ate a fruit shop you'll get this beautiful pcb coaster with a gold inlay eat a fruit logo that comes with bumpers as well it's perfect for on your desk hot drinks cold drinks it can do them all uh and it's uh collect them all if you get multiple um you would have a set 149 or more you get a free kb 20 40 this is a pro micro pinout compatible kb 20 40 board with an rp 20 40 chip four megabytes of sorry eight megabytes of flash usbc stem iqt buttons neopixel and more it's great for keyboard projects or a great starter microcontroller board that can run circuit python or do we know a micro python 199 or more you get free ups ground shipping in the continental united states it's insured it comes in a brand truck we love it ups we negotiated better rates too so we're happy to keep offering free shipping and 299 or more we are still doing our promotion with digikey and nxp which happens to also be the in and pi but this is coincidence um featuring their star crossover microcontroller uh in cortex m7 imx rt 10 11 um it's got lots of pins it's super duper fast we put it on a metro shape board you can use it with arduino shields we've got great circuit python support um lots of goodies like a micro sd card dc power usb power over usb type c debug port stem iqt um comes with a bootloader uh and tv of two already going for it um it's i think i really like our best and fastest metro ever you get a free okay good stuff and it supports us an open source hardware company um publishing open source designs uh we'll talk about uh what we hit over 700 it's up in the hardware month so may has well celebrate that yeah and join on in i can't believe we haven't used the code touchscreen before have not wow double check too okay um we have live shows and live shows that we did this week um in addition to 3d hangouts which we'll talk about in a little while was show and tell lizard show and tell we're going to um watch it afterwards so thanks list for doing the show we do show and tell every single week wednesday 7 30 p.m eastern time uh rain or shine or flood or whatever's going on come by show and share things it's a good way to bring people together and retro stuff old books things yeah things that you want others to see to maybe inspire uh them or just cosplay to to to share something that you're making and we're going to make something turns out okay um some days we usually do just elated it's in two parts what was part one this week okay so this week i talked a little bit about how uh we wrote up a guide for the qualia board and i wrote um a demo which i'm going to show one night when we demo the the new screens uh that makes it really easy for me to double check that the hardware works and also customers as they get these displays because they're all different um i also had a usb host feather i tried to do a live demo with and i accidentally took down my computer's usb port to reboot uh so maybe next week i'll do the live demo but i showed off the usb host feather so you know what it looks like at least all right and then we do the great searches where lady interuser power engineering to help you find things on digit heat dot com what did you look for this week this week i looked for clamp on ferrite beads uh i saw a post by someone who said you know i have this off the shelf uh wireless charger and it was affecting my radio rig and it was actually released a fix by just uh pulling the cable around a ferrite bead and you know it opens you can wrap the cable around and clamp it on um i showed a cable that has ferrite beads built into it um which is of course you know preferable but a lot of uh companies don't include those because they're kind of clunky and not super aesthetically elegant especially if you're apple and you design stuff in cappuccino but thankfully digit key has thousands and thousands of different ferrite beads that can clamp on so you can pick the size and shape and thickness that you need uh and they're only like a dollar or two so it will save your radio electromagnetic interference uh so check it out i show you how to select a whole bunch of different options and uh taking a look at the data sheet for the different materials you might want to pick okay you can watch all those later and then um on Tuesday we did a product pick of the week we broadcast live from product page discount on a maglade slide here is the highlight from this week it is the halloween m4 with this beautiful screen as a display for your halloween projects for your spooky projects for your skull based projects i have a config file it's called config.i i'm gonna go ahead and turn the eyelids back on so upper eyelid and lower eyelid i'm gonna uncomment those lines i'm gonna save this file right onto the drive and then i'm gonna press the little reset button that's back here and you'll see it boots up really quickly and now we have uh the lids just the pupil color i'm gonna make a red terrifying red pupil and i'm gonna change the slit pupil radius we get done done done really cool let's do the sclera with the reflection maps our dome environmental photo that looks like uh a a chrome ball type of thing it is the halloween m4 and jp's workshop is tomorrow on fridays we have deep dive with either tim or scott this week it's tim tune in 2 p.m pacific time 5 p.m eastern and dive right into the innards of circuit python we've got a we've been posting our jobs you can go to a different.com slash jobs slash careers if you're in the new york area this is an in-person job you can join our shipping team we have the job description there you can check out what we offer you can ask questions but you have to be in new york area it's an in-person rule of course because we're shipping as the part shortage has started to go away we're starting to ship more orders because we have more parts and more things we'll have a slow ate a box launch as we restart the ate a box machine so it's a good time to join cool company check out our benefits and more let's do some python on hardware okay that is not python on hardware newsletter people see behind the curtain that is not the python on hardware newsletter um it's an infinite this is what we see yeah it's an infinity mirror so as i um convince our video processing application to go to the right browser it did cool hey did you know that this is live yeah this is live that was a time tunnel um any um so this week um you can check out the newsletter there's a lot of stuff going on there's a python 312 release some people really pay close attention to these open hardware summit it's open hardware month you can check out the summit they announced probably gonna be in april so or so um lots of raspberry pi five news and then um the highlights from october fest where you can join in and do like a pr for circuit python we're participating but um check out all the projects there is always too many to go over um a lot of neat ink and displays lots of display stuff this week and more but the news i think the big news is because we have a sibling which is micro python so the circuit python is the um big broad board support education easy to use um we're you know we wanted to go on everything um and micro python is the core it's built on if you're in the linux world you know there's different flavors of linux there's like the kernel which has like kernel and then everyone builds their thing distributions so we're one of the supporters both um philosophically and financially for micro python so when we see a new release we're excited because that means we can start doing integration so lady data what were the big highlights for micro python um that we're interested in that we're going to be uh adding upstreaming more yes so one thing to note is um we do uh merge with upstream pretty common pretty often and actually right now we are in the middle of doing an upstream merge uh that is what dan and scott have been working on for the last couple weeks they're working very hard uh people who've done uh merges and have a lot of merge conflicts it's it's you know there's a lot of code that's shared but there's also stuff that's gone different and so it takes a lot of time but we will be integrating 121 into circuit python and i think i think the goal is to do it before we release nine beta um circuit python nine beta okay so now you know like why is this important because this stuff will be some of it will affect us uh circuit python users but what's interesting i thought about this and we discussed this a couple weeks ago is there's a lot of stylistic changes happening to micro python that i think were inspired by circuit python well hopefully i think that we yeah i think you're bi-directionally like there's there's stuff there like oh this is a good idea and i'm sure there's things that are like oh we like the way you did this or yeah like the way you can access things when you just be drive or the naming convention yeah so the the big change is you know that is it's it's making a difference in people's code is they're getting rid of the u prefix built-in modules so used to have to import us instead of import os and c python would be called os and then micro python u os u was like micro and it'd be like u storage or u whatever like u time not a big deal but it's it's not the same if you're learning python and then you have to kind of say like oh for this you have to remember to do this yeah and there's a couple weeks where they're doing it but i think a lot of it is like you know trying to create more um back and forth integration between c python code and micro python code because you know and this is something that we do a lot of the ate a fruit example code in libraries will run on a raspberry pi running c python well run on a desktop which i think is really cool we only have to write one driver one example code and you can use a temperature sensor an ink display on your you know desktop mac on your raspberry pi on your orange omega single board computer um or on a samv 51 or rp 2040 and so i think that yeah this was one of the decisions we made really early that was a reason why we had to fork and have a different implementation this distribution because micro python was really like nope we want to keep the u prefix stuff and we're like we really don't want to keep the u prefix stuff and so you know we we split there um but it's really great to see micro python um go with that same decision i personally i think it's a great decision i think i think it's good to have micro python move in with circuit python and it means that micro python circuit python is becoming a little bit more cross compatible i mean again we're always merging upstream and we contribute as well um but i think it's good our stuff will be on different chips then if you go to circuit python dot org you can see all the different boards like micro python has a specific set of boards they support we have yeah a whole other set um and then people make their own boards and they run their own businesses around it um for educators it's hard to um you already have to make a bunch of choices and it seems like if you're in the education space people are learning python so this just makes it easier so if you're learning python or you're in a workshop setting you're learning python and then this makes it you don't even have to remember oh let me put a micro a little u yeah of course something um so it should help even like documentation and if you can have code portability run it on that new raspberry pi run it on mic i dig it yeah a couple of those things they you know esp 32 they moved to id f5 that's actually something that we're also doing which is kind of good um id f5 uh is going to support the newest esp 32 chips um it's a big change um but micro python and circuit python both updated it they added vle support for pico w which is great we haven't done that in circuit python yet but we're thinking about it how we can do it um import stuff has been treated to optimize i think that's probably going to be you know that stuff the core implementation not port specific stuff does get merged into circuit python so we'll probably be able to benefit from um their speed ups on importing uh the edit esp now i think we do too you know in circuit python we added a pr and they have a laura module as well so um some good stuff you know i always tell people there are some things that micro python supports that circuit python doesn't and vice versa there's space for both of us yeah i mean the good news is you can choose um there's a lot of electronics out there where you have to use their id their cloud dang their thing and you're kind of stuck with it and once you're stuck with it that's the end of it um it's nice to be able to run whatever you want to run right right tool right job um also experiment MIT license try them all out great um so that is but on hardware news you can get the newsletter every single week has all this and more deliberate your inbox totally separate site aforddaily.com the way you know for sure we are not going to spam you because we don't like spam even more than you don't like spam okay it's open hardware month um and uh celebrating open hardware month it's kind of good timing um we're past uh 420 redesigns we had our team make disc graphic one of the reasons we're doing these graphics is we're putting svg animations on our site because they're really lightweight and everything so we're like oh here's a cool one this is like trippy ha ha 420 you know get it out just get out of your system ha ha ha jeez well it's just you know no it's just funny um so you're actually past this so we we we sailed past 420 redesigns but you don't want 460 redesigns and that way we're not stuck with any form of chip shortage i kind of have a feeling there's going to be natural disasters or political meltdown the conflicts around planet earth that are going to affect electronics and everything else in our lives so we wanted to make sure that we're not going to be stuck with that again because we just lived through that for the last three years in some way so the redesigns of all these uh products yeah um allow us to have different chips have different suppliers um when things aren't available can move to a different one yeah and i'm also like not yeah used to be like oh this chip went discontinued but you know maybe i have a couple years now i'm like i'm designing that i'm not even waiting you know i don't even know about it again so um moving much faster on um the redesigns but yeah you'll see a lot of boards on new silkscreen and we're talking we know the new product this week is a redesign as well that's exciting okay so if you go to ashua.org and you check out certification and you type 804 we just passed 700 so we were the first to get to 500 the first to get to 600 we're the first to get to 700 we're at 708 and you can see so certified open hardware certified open yeah certified it well it's just ran off the screen it's first but it's like yeah certified and um you know uh there's lots of entities out there that use the term open and it's a fun marketing term but there is a clear signal you can send to the world if you want there is a way to say our stuff is out there here's the license here's the files um the certification process is easy um we're up to 700 we'll see you know how long it takes to get to a thousand but um this is one of the things that we do this is always out there for as long as there are humans and computers this hardware is available the software is available and you can use it modify it do all the things you want to do to it it is yours and you can also buy some stuff from asset beyond um learn from the designs a lot of people do um we do have a bunch of uh learn guides um yes one thing i wanted to mention if you haven't already go to our playground section because we have a lot of uh these anyone can do these all you need to do is make an account on any of it but um learn guides this week what are the ones on the big board lady okay um all right this week uh a couple updates okay so the iobasics guides actually got a pretty big update i know like sometimes an update is like oh we updated like one schematic drawing but the iobasics guides uh the dashboards and feeds which is like behind me right here yeah feeds uh Brent just did like a huge scrub down he's just like scraped away all that old paint and he's like this beautiful one underneath and then he varnished it um it basically the equivalent of um to check it out they're now updated they now talk about whip or snapper they talk about the new uh interface uh they describe feeds and dashboards in more detail and all the dashboard blocks and updates we've had a lot added recently so it says by Todd but because he was original author but Brent just did a huge update and I want to give him that love um super nintendo usb controller this is a remix of uh a remix a remake of a really old guy that we had that used a teensy two and you can't get those anymore and some people are like hey we still want to build this how to make a controller to usb so Robert Dale Smith um we we just call Robert Smith because we wish we were friends with the lead singer vikir uh updated it to use a kb2040 um a great demo and also he's an expert at converting controllers to usb uh trevor did a um rgb matrix near times scroller maybe also last week but anyways it takes yeah i was a little sweet but it's here it's still cool um and he's going to do another really cool guy he's working on but he's uh doing projects for pi leap and circuit python in the matrix portal okay and then uh go up uh another remake so the how 9 000 prop was one of like our first prop projects uh phil b and you and i did it together and the original used an arduino and it used a wave shield and there's a lot of soldering and there's a lot of hacking around to get it to work this version is 3d printed um it looks great you still use our button it's very similar to the style but now it uses the prop maker feather which means there's no soldering like audio buttons leds um all are built in and you just use a screwdriver to connect the wires together and you've got like a fully ready to go prop and you can put any audio files you want on there um wave or mp3 is supported uh to make your very own um computer that doesn't let you into the um yeah i think what we'll see is some folks use like chat gbt or something like it and some of the audio um with the new versions that are coming out you can talk to it yeah and it does voice recognition with like whisper and then it'll talk back they'll probably have voices that you can use so it'll probably get pretty close to to having something that you can have at home that that is an interface to howl you know that that's that seems close an approximation i wonder if you ask chat gbt for to act like howl like what would happen um you probably can um one of the other things that would be interesting um i don't think we're gonna have time to do this but i'll just throw out there there's probably gonna be a um like chat gbt llm interface for hardware at some point where you talk and there'll be a bridge between it and it'll allow you know control of hardware i mean they have this with like siri and alex and all that something but but yeah it's very hard for it to work so this might be something interesting someone probably will come up with this and maybe maybe they'll be inspired by this yeah they'll definitely be adding i'm assuming they'll be adding yeah and then um one other thing you know the creepy part of um 2001 space odyssey because this was a long time ago when this movie came out and the kubrick did a really neat thing where they're like oh let's go into the room yeah and and like so how can hear us and do you remember um how looked at the the lips oh yeah they had the quiet they had the yeah and you see and you see how you know you see the camera going back and forth and what an interesting thing because the chat gbt now has um photo recognition be interesting to see if one day um ai can start to do lip reading that's so hard yeah um well you know it isn't or it isn't yeah so we'll see what happens with all this stuff but um you know i know some of this is like a little polarizing i say like why don't we learn about this why don't we make it open source and why don't we share because that seems to be the way to to to use these tools just like all of past technology um you know everything runs on open source so some of these projects are kind of neat because it's better than well i'll say this i'd rather i'd rather build my own llm chat gbt open ai thing with hardware that i know about and the software that i know about then like siri or lexow nice work i mean at least i can do stuff i mean there's the people who i think run large language models on like a raspy yeah like you can yeah it's not yeah it's good as the big ones but yeah but i feel like that's that's that's how we're gonna learn anyways um especially the next generation coming up do you want people just to have like all you do is talk to it and talk back or do you want to build on top of it and understand how it works um and then share that and then you know raise all of our knowledge okay um any other uh yeah sorry i think there's okay we have the qualia guide um we'll be showing the qualia board as well and i think uh that's it for this yeah we have a video or two right yeah okay let's do some factory footage and you can tell who grew up trying to imagine the music videos i would make for mtp okay uh let's do some 3d printing okay now kydro have their video of the week we're gonna play back to back this is the hell video and then a speed up to get away i am howl 9 000 i am powered by the eta fruit rp 2040 prop maker feather build a prop replica of the iconic howl 9 000 from the movie 2001 a space odyssey press any key to enter the powered by the eta fruit rp 2040 prop maker feather and circuit python this project uses the biggest arcade button to trigger audio samples this is a remake of an earlier eta fruit project that used arduino and a wave shield now we can simplify the project to have better quality audio and no soldering required thanks to the feathers integrated audio amplifier and built-in storage the arcade button features an led that when pressed randomly plays an audio file as the led blinks this conversation can serve no purpose anymore goodbye a three watt enclosed speaker is used to output high quality digital audio from the rp 2040 prop maker feathers i2s audio amplifier quick connect wires make this a no solder project just plug into the terminals and secure the wires to the screw block terminals on the prop maker feather circuit python makes it easy to add audio and leds to your projects the code pulls a list of audio files stored on the prop maker feather and randomly plays them when the arcade button is pressed to learn how to build your own check out the guide at learn dot eta fruit dot com we think this is a great starting point for all sorts of props that need audio playback and leds the enclosure is 3d printed and joined together with screws making this easy to assemble we hope this inspires you to check out the rp 2040 prop maker feather and circuit python for your next project circuit python is the best interpreted programming language i've ever experienced in all of my existence okay and before you go to iron i'm trying to get the code is touchscreen all the freebies all apply save 10% off i want to these things save a buck or two okay let's do it i on npm brought to you by tiki this week it's nxp you know what is the new part of the week okay yes from next period this is their first load switch it's okay you know i was like oh maybe they have stock other ones and this is just their latest nope this is their first time getting into this market so this is the nps 40 53 i was anxiously waiting until this was in stock uh and it's now in stock at did you keep so i feel like it's time to highlight it um so this is a 5.5 volt or five volt load switch 55 milli ohm um it you know are on resistance uh up to 80 milli ohms at v in 2.5 and basically it's what it sounds like you have an input voltage and output voltage and you want to connect the input to the output uh you know so that you can power a sub circuit turn it on turn it off um have current limiting um have under voltage lockout protection have short circuit protection um can be used for a couple different reasons uh one can be um used to turn on and off a circuit to reduce power or to protect against again like short circuits like you have in this case uh the example for the application is usb your usb device malfunctions you don't want to take down the hub and the computer um so you would be able to disconnect it cleanly and um this is just a very nice all-in-one integrated switch that does a lot of things so a lot of times when we say you know you want to turn something on or off um you might use a mechanical switch and you know we've done that before we have circuits um and i'll show it in a little bit on like a metro we'll use a mechanical switch to uh sorry on the um bff lipo for qt pi we actually just use a mechanical switch to turn things on and off the switch is rated for the amount of current we need to pass so you just uh you know toggle it left or right turns on and off or here's an on off mechanical switch that's designed to carry you know up five ten amps of current uh but you know that's mechanical so for electrical you know you can use a relay or recovered um ssr is a bunch of times on ion and pi you can check out those videos on when you can use an ssr these are also great very high currents uh very fast um you know have uh not mechanical disconnection but good electrical disconnection between input and output but these are really big they're meant for like extremely high currents and extremely high voltages you know 200 300 up um so this is you know an example of of a mechanical switch that we've used it's really simple you want to either um connect the vbat voltage the battery input to the five volt power line or not um you have a mechanical switch you flick it to connect you flick it to disconnect in this case it's a dpdt and i kept it in parallel to get twice as much current rating um i want to make sure that the five volt doesn't feed back into the battery and so you'll see that diode and like i said this is a mechanical solution uh works fine but it tends to be for either um you know either you have a small switch and in its low voltages and current is or it's a very big very expensive relay or ssr or switch if you want to do it electrically um so you have a voltage controlling whether something is kept or disconnected another common setup is the p-fet so t2 the transistor in the middle there is a high current p type MOSFET and i think it can pass four amps or so and i think it's good up to 12 volts uh vds and vgs i do have a switch there but you can wear that that switch is just you know if you want to also connect it electrically and pfets do quite well except there's a couple of downsides this is a high side pfet so one is if you want to control this from a lower voltage you'll have to have another n-channel or npn type transistor because you see the gate is pulled up high to the input voltage and so you don't want that to go into your microcontroller so you'd have to have a separate transistor just to um switch on and off the gate uh the second thing is that you see in the symbol for the p-fet transistor t2 there's that little diode that's pointing back that's the body diode um and in this case um what would happen is that if you you know had a separate power supply or maybe some leakage into the v-in voltage it could go back into the power supply which is not good you don't want to have bidirectional switch um current you want to have no direction at all like neither from input to output or from output to input sometimes you can um for in this case i put in another diode you see d1 and that makes sure that there's absolutely no way for any backfeeding or sometimes people use back-to-back transistors but now and i have two transistors and you have to switch both of them and it gets a little more complicated um and you know you need a couple of passive resistors as well to do the pull ups and downs so this is a common you know way to do load switching but there's a lot of downsides there is not true disconnection um another thing is you know i've used this in uh i use this in a feather design once to switch on and off an i squared c power supply to you know internal i squared c sensors and it worked fine when the i squared c sensors were 5 10 milliamps but when it hit 50 milliamps because turning on the MOSFET is like instantaneous there was a huge current spike as it powered um you know some capacitors or some uh high powered electronics on the output side and it would brown out the input because of this like kind of instant fast rush of current and so there's no current limiting here you could add a crowbar circuit but now now it's getting really complicated it's getting to like 10 components just to turn on and off some circuitry you know another solution um that you could do is have a separate regulator in this case you know this is another design uh type i used so instead of a pfet i use a separate regulator and then the enable pin is tied to an i o and then you can turn on and off this works great as long as you have a higher voltage with enough dropout that uh you know when you have that current rush it doesn't affect the other power supplies um but you know you don't always want to have a regulator for each one you know you have to add more capacitance um you have to pick one that doesn't have uh you know feedback voltage from output to input um sometimes you don't have headroom anyways for an ldo you know you maybe have a dc dc power supply that is providing a lot of current to multiple uh subsystems and also the regulator could be kind of big um because it's also doing regulation when you really just want to enable or disable it so thus the uh nxp um nps 40 52 that's a factor bar um so here it is it's a two millimeter by two millimeter package so it's nice and small it's very simple you have the input and the output you have the logic switch on you have a flag output so that is something that tells you when then there's an error if there's a short circuit or under voltage or over voltage or whatever uh i limit which is kind of the resistor can be used to limit the current to convert from constant voltage to constant current and there's a duplicate output because you know you want to have a sorry there's a the output voltage and then there's a ground and thermal pad so very simple only six pins required all of them do something so this is like bare bones um i will say that you know the one thing to watch for this is designed for three to five volt logic um input you know it's you saw the example was to use it for usb but it does do up to two amps output current just quite a bit um this is good for high power switching on and off um you can set the limit to anywhere between zero to two volts sorry zero to two amps but yeah you can't really go above five point five and honestly i would stick to between three and five volts for this um one of the nice things is you can see you know you turn it on it has this kind of the slow start is what they call it where um you have a slow ramp up which is often better for electronics they kind of want the power to slowly ramp they don't want it to like go up ring you know go up and down and then also in turning off um it's it's instantaneous so you want like a slow start on and quick start off or quick off uh the handle's trans gins pretty nicely you'll want of course capacitance on there uh reacts to short circuits very quickly you can see the bottom right when there's a hard short it like pretty you know there's a quick current spike and then immediately you know the protection kicks in and it turns off the output within you know a few microseconds um here's just a short circuit protection that they talk about um what is nice is that when the short circuit goes away uh it does recover so like you know the current limits but it will um you know when the short circuit is released it's like okay you know i'm good to go and it comes back on um some voltage regulators and switches latch on or off and then finally there is the fault output flag kind of handy so it tells you over temperature i think under voltage over current etc and then of course the enable pin can be controlled if you have a 5 volt power supply you can control it with a lower voltage i think the neat thing here is the the constant current capability is really nice just pick a resistor and then you can limit the current and it will automatically convert from constant voltage to constant current mode um just quite nice because it means you know if you have something that's taking a little bit too much current and like a fuse which will just instantly cut it off you'll just you know slowly reduce the power and maybe um you have a chance to recover available on digi and they're in stock and you can see 3000 like a full reel they just came into stock today so you can pick these up it's a very nice uh first load switch available from nxp i mean a video we're gonna play it now let's take a look at some of the key product features that the nps 4053 has to offer the input operating voltage range for the nps 4053 is 2.5 to 5.5 volts at 5.5 volts input the rds on is 55 mili ohms this allows for lower power dissipation lower voltage drop across the passfet in greater thermal performance the maximum continuous current that the device can withstand is two amps this is the amount of current the device can sustain indefinitely whereas peak and rush current is only sustained for a short amount of time the nps 4053 also features a precision adjustable current limit that can be programmed with an external resistor from 110 milliamps to 2.5 amps this device also features an active low fault pin which asserts low under an over temperature over current or reverse voltage condition one of the unique features about this device is its eye limit pin protection this means the device will continue to operate normally if the eye limit pin is shorted to ground or open and will continue to regulate current normally this device also features active reverse voltage protection which means the passfet will turn off if the output voltage exceeds the input voltage by about 75 millivolts typical lastly this device features built-in soft start which allows the output voltage to be applied smoothly and gradually to the downstream load to prevent the instantaneous delivery of power which can damage the load next up let's take a look at the nps 4053 versus the competition the nps 4053 offers best in class on resistance maximum continuous current eye limit pin open and short protection reverse voltage triggering threshold current limit accuracy and all of these devices offer over current protection over temperature protect outside on api oh gido gido before we go we're doing new products and yet we're just touch screen let's do some products new new new new new new new new new new new new new new new new new new new new new new new new screens lots of screens okay screen new screen we all screen for screen for screen screens okay this is the 3.4 inch uh squared 480 by 480 display without touch screen um let's go to the overhead and i can i can show my demo i finally got all these demos going so this is what these look fantastic in person and we're going to still share them on all the overheads though yeah so but we know we do our best okay screen through screen through screen screen so this is the version without a touch screen so you see it's much thinner and it doesn't have a bezel and this is a version with touch screen so it's kind of tough to see it's on but it's got uh the glass bezel um so it's got more protection it's a little bit more expensive um and here i'm driving it with the qualia esp32 s3 you do need a microcontroller that can or a micro computer that can drive these rgb dot clock ttl displays and most can't the esp32 s3 is kind of unique in that ability um i have here just doing a color demo and then uh this is also a touch screen so you see as i touch it with um capacitive touch so i touch it with my finger i'm drawing um little dots so this is a 480 by 480 square 3.4 inch diagonal display so it's the first of our set in capacitive and non-capacitive okay so next up bar display um two tfts walk into a bar so this is a 3.2 inch 320 by 820 i think bar display um also available both with and without capacitive touches without and then if you keep going this you know without the capacitive touch you see it's much thinner and then yeah that one with the bezel with capacitive touch so this is the other one that has that's that's the last one yeah but back to the yeah so there's differences when they're that's a four inch they look slightly different okay so this is the 3.2 so this is the bar display um so it's much more tenure than most um but it can be really cool so i think there's a lot of times where you like you want a very slim display um with a lot of pixels so 320 by 820 pixels um let's go to the overhead and i'll show this one next uh so this is the two versions this is without the touchscreen overlay you see there's no circuit here this is with uh so it's got that nice glass bezel you're gonna pay more for capacitive touch uh but the without capacitive touch is um also perfectly fine um and this this demo is also showing off this one you need to be a little closer yeah so showing off it looks you know amazing person but it's a tft of a tft of a tft uh so this is also capacitive touch so you see i can uh touch it with my hands um and the white dots show up over the rainbow so using a qualia esp32 s3 board um for this again you do need to have a microcontroller that is designed to work with um rgb dot clock tatl displays um you can do like 16 bit color and and large displays um but we've got example codes and a tutorial for this in arduino and circuit python and then finally on the display train is the four inch 720 by 720 so this is definitely like as big as it's going to get um for a number of pixels on these displays we also have these in um with and without capacitive overlay uh so this version you know happens to be the photo we added is the one without capacitive overlay but the demo i have on the overhead is with so we can go again to the overhead again driving it with a qualia esp32 s3 which is designed to drive these displays it's flickering because it's you know it's a camera taking a photo of a tft um but this one is also a touchscreen with capacitive overlay capacitive overlay is going to cost a little bit more but of course it has touch and you know it's got a nicer look because there's a bezel to it so you decide whether you want with or without um capacitive touch bezel uh and again supported both in arduino and circuit python all right next up okay uh this is our vision um we have our can feather back in stock it is the samdi 51 based can board now comes with the terminal block pre attached might be in green might be in blue might be in black but even less soldering than ever it's kind of plumb and play ready to go so you get you know a samdi 51 um that has a can peripheral built in we toss on a transceiver terminal block are you ready to do um can communication on a cortex m4 in arduino or circuit python okay next up we now have the usb cc version of this kind of like built-in monitor cable so this version has usb c on one side usb c on the other side um and so it's good for if you want to use this with usb pd power delivery it'll tell you the wattage that it got on the other side which is handy because otherwise you know there's no real way to know like did the power delivery work am i getting that you know 100 watts or 50 watts because by default five volts one amp is only five watts so if you see um like this image you can see you know to get 11 watts the power delivery must have worked because you're not going to get more than 10 um unless you have a functional power delivery so phones tablets um you know computers like raspberry pi whatever um other devices that have power delivery laptops um this will be a very handy cable it's a very nice quality and also like you can now tell what is the fastest charger in the house i use all the time for when i'm charging you know my laptop or my tablet because you know sometimes some of the pd um power supplies i have don't have the exact voltages that the device wants this way i don't have to like look at the little text and unplug it i just plug into one after the other until i'm like oh that's the one that gives me 30 watts great i'm done and star so tonight we said you lay data our team our customers our community is yay it's the desombification of our 2.4 inch tft feather wing um this has been like two years out of stock because tft shortages chip shortages um but it's now back it's better than ever so glad to see this we did the tft shield um sometimes it takes a long time to these big revisions but i think it's worth it so if we stop on this image um the big changes are we now use the tsc 2007 i squared c resistive touch controller instead of the stm pe spi uh touch controller so that's kind of nice um so now we have one free pin uh we don't we used to use it as a chip select but now we're using i squared c so we don't have to have another gpio pin used so we connected it to the irq line so if you want like really fast notifications of touch input you know alerts you can just watch that gpio we're using interrupt we updated the silk screens looks really nice now using futura um the reset button is right angle now and we also added a stem iqt port you can see that the kind of bottom right area and uh i can just i can show the demo i mean the demo is very similar yeah but why not hold on all right we'll get in okay so uh we'll be overhead so this can you work with basically any feather i've tested it with the 32 u4 up to uh the rp20 40 and the sam 51 so anything that uses spi and i squared c in the correct locations will work um you can read images and files off of the micro sd card uh you can use the on off to turn on off so like you know i want to quickly turn off the whole thing that's kind of nice this is the reset switch it's now right angle you can see it starts over the program except my sd card doesn't like it when you cut power in the middle um so this is a demo which uh draws some flowers off of the sd card and then uh there's a resistive touch screen so resistive makes it inexpensive but you will have to use something kind of pointy you can't use your finger pad unless you really press down fingernails work best um and then the stem iqt port is over here for boards that don't have it like rp20 40 does and then if you want to connect to the backlight to control by default that's always on or the card detect that's also available but i know people have been waiting for this redesign for a long time and i'm kind of psyched that uh man i mean sd card this sd card really likes to be power cycled uh i'm glad to have it back in stock and it's back yeah let's see some images and more and just another example of we don't give up dude dude i did did so many redesigns and this is products okay doki um don't get good touch screen and free stuff now you know why it's yeah go over to uh discord h4.it slash discord or discord.gg slash ate fruit let's do some questions how to call line up oops what's that one okay um discount code someone had asked before touch screen i just put that up there um person purchased four hollowing boards and was wondering if there was a way or their code sample to synchronize left and right eye movements yes i'm like 99 sure that we have a guide specifically on i think it's like hollowing like two eye or dual like yeah yeah i'll say you know we have thousands of guides so i just it's it's tough sometimes i maybe i don't think dual do you well let's just yeah let's uh let's go to let's go to the uh you want to do live search well yeah i mean i just type hollowing yeah okay so let's we have a lot of hollowing guides that's cool macintosh synchronize lines yeah with two hollowings like this so we do have example so check it out you can synchronize them that way yeah um and then a question you know i'll span a couple different chats um would you be able to make eyes with the new screens that we have would you be able to do how or how would you do it if that was possible so to do i which is something we've chatted out so first off i want to take a look at the eyeball code and see first off the the resolution is much bigger um but you know the esp32 s3 does have pretty fast tft updates um another option is i do have code to play avi cine pack videos so you could just have a video of whatever you want to play so these are dynamically generating um the eyeball code but you could also just have a pre-recorded video of an eyeball which could be kind of fun to um and pop it on there but it's definitely something i'm going to try to do before halloween yep okay i'll go back to another question here um i'll do a uh there was a question about advox and there was a question about raspberry pi fives so for advox our plans to list to get some advox out this year we are restarting the advox machine so what we're going to do is as we're doing that we're going to let everyone know we're going to be able to get a small number out first and then more later and then more later and then lots later and then um hopefully next year as we're kind of back in biz um with advox it is get back to you know scheduling out for a year i actually want to even do more we have some other ideas on how to do more but a lot has just been pending being able to get you know thousands of thousands thousands of parts of time okay and then for raspberry pi five um what's the best way to get a raspberry pi five here's what i'm going to say listen to the people who make them raspberry pi on their site has a blog post and they say if you're a subscriber of hack space magazine or magpie you get a code email to you you can still subscribe now and that is the first round of raspberry pies that's going to go out so they obviously want people to subscribe to the magazine they fulfill them yeah they fulfill through uh i think it's like pie hat or something and um that's how that'll be the first way everyone else is pre-order but that just means back order so it's unknown it's unknown which how many each all of the official resellers are going to get and then there's people pretending to take your order um we got a notice from um i think it was raspberry pi that said hey watch out this is happening i think other people notice too there's companies that claim they'll take your pre-order and then like one day in the future so what we're going to do is when you see the raspberry pi fives in our store it means we actually have them and when you place the order we ship it so the downside i guess for us it's not really a downside it's just a different way to do business is we're not doing pre-orders or back orders if you see them on our site we have them so i think the best way for sure is to get it from raspberry pi through their subscription you can always place pre-orders anywhere you want it's just unknown when those are going to ship for back orders and then if you see them on adafruit can sign up to get notified when we have them stock they we definitely have them we don't we won't ship something unless we have it so those are your best bets next up what determines the product pick of the week just curious always wonder if it was random or whatever this for jp yeah for jp jp and i and the new products team work out our schedule we try to do stuff of course it has to be in stock you have to have plenty in stock we don't want to work you know we once ran out too quickly so we make sure that we have plenty in stock we try to do things that are thematic or recent we also sometimes do classics or you know recently a lot of stuff has been coming back into stock if it has you know the feather and four hadn't been in stock for really for like a year um and so we did that one because i was okay let's celebrate by giving people half off um so there's you know it's it's it's half random but it's also half uh carefully selected chosen yeah okay let me see if there's any other questions uh yeah well that's sort of a question on us so would you be able to what if it was possible how could you have the eyeballs follow something that's a question maybe a people's sensor don't know yeah you do a people so the people's sensor just tells you whether they see them or not um we did do an eye following project with a raspberry pi i believe if you also if you want to learn and search i think jp did it a spooky um portrait and the eyeballs followed you and it did um open cv with a raspberry pi and a raspberry pi camera yeah oh by the way you've done every project i just have to remember what it's called yeah it's our backup arena the learn system um and then a note here um as magpi notes you can scribe to both magpi and hex base and this person did in chat and they got two codes so that's if you need to that that would probably be a better way so i do it because it's still you know there's it's not a shortage but there's a limited every pie release there's a limited yeah there's not unlimited so that's what i would say is like play you could place your bets with the best bet would be going through where raspberry pi is like you will definitely get one because we want you to subscribe to the magazine and then you could probably um place orders on other sites that say they're doing pre orders or back orders um it's just really unknown when those are going to ship and if they charge your card or if there's part of another order or if something comes up so we're just sticking to if you place an order on our website for raspberry pi it means because we have them and we're going to ship them to you i do want to check really fast i'm like 90 percent sure that we have uh we do have raspberry pi four four gigabytes in stock right now yeah if you want if you want a raspberry pi four gig which is like a very good it's like a good middle of the road it's like not one or two gig it's not a gig yeah it's a good amount of ram those are in stock right get one anyways um because you might need it for a project and uh who knows as you know get them get them why they're getting good um yeah there was a lot of talk when there was a shortage not so much now that they're all in stock because that's just the way the pendulum swings with okay you need a cluster yeah okay cluster data yes we're here we have yeah go for it okay that is all the questions right of time yeah thank you so much everybody don't forget the code is touch screen free stuff waiting ahead for you this has been an ad for production we very much appreciate that you came by tonight thank you so much here is your moment of zener good night everybody bye