 Good evening everyone. Hey, how you doing JP? Look here. We are What are we doing here? We are Showing off projects from people all over the world. This is show and tell. Yay. That's exciting. It's so fun We're here guest hosting tonight, and we are excited to have people come up and share some stuff If you want to share some things show some things tell some things You can find out all the info on our blog or head over to our discord It's a to free dot IT slash discord go to the live broadcast channel. You get a link And then you can come in and show us some stuff Who do we want to go to first catney? I think the first person we're gonna chat with tonight is Sean Let's bring Sean on you can go ahead and hey look hi Sean. Hello. How was everybody tonight? Excellent? How are you good doing? Well, so my project and I have lows of demo day to tell and so I made a Let's see if I can get it just to focus here a raspberry pi Compute module for board and it's what I put together. I think it was like back in December I laid out the files. I had the schematic all ready to go and I was unable to purchase a CM4 because you can find them and I Finally got one in I soldered this board up and it worked well enough for me to make my video But it decided to not work for tonight's demo and I've got it down here Hooked up and what ended up happening was I was going to plug it in and apparently I did not solder this connector well enough and USB-C power connector just Came off so I would probably have to re-solder another one of these boards I put it through my my reflow oven and I'm trying to give it power through this 3.3 volts I don't know if that's gonna work because that's probably enough to power the CPU But some other things on here might require five volts I didn't look at the schematic for the CM4 before jumping on this and I'm not getting a Console out for my USB connector here, which I was you can see it when the video goes live I think next week or maybe a week after when that goes live you can see it definitely working I write a quick Python program for it. It like blinks the lights It's like oh, yeah, I made my own board carry your board for the CM4 And I'm super excited about it because it's it's really kind of the first time I'm working from scratch with these little for rosé connectors They're a bit of a pain to both use and find some time Yeah, Sean for people who don't know. What is the compute module? Oh, excellent So if you're familiar with the Raspberry Pi, it's a single board computer The compute module and I can bring it back here again is something that Raspberry Pi released They put all the things that are on a Raspberry Pi 4 so I've got my big 4 right here And here's a huge module 4 right so they scaled it down and they got rid of all the little connectors and power stuff and and USB and an Ethernet slots around the side So the idea is you can lay up your own board So it just stacks on here with those old rosé connectors It and you can give it the exact peripherals you want if you want to control the size for your embedded system Which is great for like embedding it in things making it lower power and you don't have these big old like Ethernet and USB Ports sticking out of the side and there's no there's no GPIO It's it's really for you to customize you can't do a whole lot with this with the compute module Unless you create a board for and there are boards you can buy There's like the IO board and some others that I've seen out there There's ones you can buy but the idea is free to make your own for like industrial applications Very cool Do you have some plans or you wanted like a product you want to make with a compute module? You just want to get the feel of what that process is like really just getting talk about it. I don't know Right. No, it's not that secret. That's that's all I have for it plans wise. Maybe in the future like what next time I need a single board computer in some sort of you know more easily transportable Format mobile format. I will likely do that More than likely I would relay out that board or add some stuff to it because I mean It's it's like a USB connector and like seven GPIO. It's actually pretty useless. It was just experimenting with that process Sorry about the USB connector those are the surface man USB connectors are mostly connected through optimism and goodwill, right? Tiny bit of solder holding it up. Yeah And the ones I bought actually like I don't know if it's focused in the one The one I use actually does have the little like through-hole things But I don't think I got enough solder in there or my stencil didn't have solder So yeah, it was just basically being held on there through goodwill. So lesson lesson learned in my soldering techniques All right. Well, we're looking forward to the video of that. That'll be really cool Yeah, that'll be on the the digi-key YouTube channel. So check it out. Great. Thank you. Thanks all All right next up. We are gonna chat with Jeff Hi so I've been on here with clocks before and this is a board with a little real-time clock This is the Ciduino Zhou shield for There is our board, but it also works with the QT pine. I've got an RP 2040 here Mm-hmm, and then the real-time clock is a PCF 8563 and Adafruit had some modules for the 8523 and some other real-time clocks, but they didn't have one yet for this particular chip so when I saw the Saw the item up on the Adafruit website and it said this doesn't work with circuit pipe on yet I thought I cannot let this pass Challenge has been thrown down so Yeah, I've created a GitHub repo for the driver and I'm kind of putting it through its paces But I can set the time and I can get the time back out and that's like really The basics there is a battery on the backside to keep the time when you unplug so It is kind of the the least expensive. I think of all the PCF real-time clocks So if you're looking for something in your own designs, I don't know They probably checked that it was available or else they bought the last 5,000 of them who knows But yeah, that driver will be coming out soon So if you want to pick up that carrier board to use with a now or to use with a QT pie That's one more thing on it that works and the screen also works, which I discovered while creating this demo for y'all That's nice and that that carrier board Seedwin also gives you like SD card slot and some some nice Yeah, so there's the SD card slot and then these a couple of these are I to see and then I think one is analog One is digital. There's an on-off switch here, which didn't actually switch anything on or off But you know the QT pie in the shower a little bit different there is a user button and Then there's some kind of IO connector here that probably brings out all those those IO pins So that's what I know about it so far. Oh, and this must be a battery connector. Yeah, I think so Oh, yeah, so it's a nice capable little little board and I'll have to find something to actually do with it, but for now the driver is working. So yeah, oh great work Thank you for doing that times the important thing All right, excellent. Well, thanks Jeff have a good evening y'all you too. All right next up. We are gonna talk to you Melissa Yes, we are hey Melissa Oh, can't hear you. Oh You're muted. I can unmute you There you go. Can you get back to me? My demo just crashed. Yes, absolutely. We will go ahead and talk to Scott Hello Hello, how's it going? It's going well. How are you? Good, I had to adjust my camera because I'm standing Because I have something that's kind of large to show now folks may know what this is It's a wee balance board, I think they saw my bed somewhere in our house. I know it I've got one there too. So I'm so I'm here to recruit people. So I opened it up Mm-hmm. This is the inside of it and this is the main board here and this module You can see here is the the Bluetooth classic module now My goal is to not have to use this module but rather being able to I use what I have here Which is like a feather doubler feather wing that's attached because when I opened the battery compartment This is what I replaced And it this is the battery compartment and it has you are tx and rx pins on it which Just blew my mind I was like, I got to figure out how to use this You can see here. There's this connector that I snipped and that's what I attached to the feather And I found a an academic paper where people had managed to talk to this over the you are But I can't figure out how to do it. So if anybody's worked with these before and Wants to hack on them some more or knows the secret to get it to talk over you are Let me know Because I haven't figured it out yet. I suspect maybe it has to do with some manipulation of the main board But I'm not sure so I thought I'd come in here and say like hey So it's not like a set of four load cells Like what is it doing to know what you're doing and what does it know that you're doing, right? So it's just there. They're just load cells on each corner And basically the the math to know what you're doing is just like which of the load cells has the most weight on it From what I can tell I Don't think there's any other sort of sensors here I Think it's just like the four inputs and then this is all analog stuff And then this is the chip that's computing everything and then it's just communicating over the module I think it really is just the four load cells That this is doing Yeah, yeah, and there's some really good code to use it over with Bluetooth classic But I don't like Bluetooth classic. I'd rather be able to use whatever feather. I want over you are What sorts of things are you interested in doing with it? Like more stuff or seeing if you're like leaning on one hip too much while you're well So the reason that I was doing this is actually I have two cats as people who watch my deep dive No, and one of them has had her foot her weight's been fluctuating a little bit And so what I was like, you know, I'm trying to regularly weigh them to track the weight of the cat But I came up with this idea of I could actually put one of these under the litter box Every time they use a litter box it will weigh them, right? So that's that's what I want to do is I want to weigh the cats every time they use the litter box There's all kinds of things that need to be weighed So that makes a lot of sense and the size is pretty excellent for especially for a litter box But for all kinds of things that are fairly large and stationary, you know only yeah I found two of these like if folks want to get involved in this at least in the u.s I've gone to like good wills and stuff and managed to find them pretty easily one of these I got one of these was labeled two dollars and the other one was labeled seven dollars So they made they made a ton of them and they're so big that they don't really sell online So if you just go in the stores, you might get lucky and find Yeah, I'm sure you had mentioned something about them a couple weeks ago I saw two of them at the Goodwill just down the road the other day when I was there We already have one or possibly two of them So I didn't pay attention to the price but yeah, but the full and they're built basically to military grade Yeah, because they're for consumers to jump up and down It bothers me so much that something this large is like essentially obsolete. Yeah, right like nobody's gonna connect connect it to their We although people have been able to connect it to like raspberry pies as well. So If people need to waste stuff, they're a great option They're they're high quality and they're really cheap because they made some of you Very cool. Great. Good. Let me know. Yeah, find me on the discord Thanks for coming by Thanks for having All right, next up. We are going to go back to melissa who uh, so she's ready to go I am uh, okay. So what I have here is I have uh, let me go and tilt that down I have this little board here with a little um, smart switch I actually Put this together a couple years ago just to program these smart switches Matt has motor running on here And so I have done a made a project here with the macro pad and And if I go ahead I can actually Control a couple Of course crashed again. Just a second Yeah, I think melissa's camera we're hearing has uh, yeah Cut out of the screen people. Okay. That's backup So I have it says, uh, I can turn on and off the light here And it's on that Your camera actually crashed the image. Yeah Oh Let's try removing you and bringing you back in. Hold on one second Can you see me? No, no Black Try reloading. Um, and we will Come back to you. Okay. All right All right, um, I guess We can bring on our good friend Todd. Yeah For sure waiting patiently at the end of the screen there. Hey there Hello. Hello. How are you? Um, so I've been working as you might have seen on twitter this little, uh, which and which jp Demoed yesterday this little version of asteroids done in Circuit python, but I want to show it on a different little camera here. So let me change Yay, asteroid. Yeah, so yay asteroids. You can play it easy. You know, this is all fun There's no sound. Uh, jp's version has the sound but not only is it on the pie badge. It's also on The macro pad so you can fly around And shoot things. Oh wait, it's also on the fun house impossible Is there anywhere it's not It's also on the the open hardware summit, um badge Yeah, so so this is like sort of to me is a really great demonstration of the power of circuit python is you can put all All of the, uh, like have all of the boards be the same code. This is this is the exact same code.py Um, just with some small changes to switch off different, uh Different sprite sets because different boards have different different resolution displays and stuff But that's a that's a pretty good collection of different, uh processors on those and and screen Yeah, yeah, exactly. Yeah, it's four different cpus. Um, all which all have their own Quarks if you ever try to program in arduino for any of these chips like the esp 32s to the rp20 40 the nrf 52 84 uh 8 40 or whatever Um, not exactly easy even if when you're in arduino, which supposed to be sort of platform agnostic. So Uh yay for circuit python. Thank you scott for making display. I work so well Yeah, I was uh when I was looking at the code, which um, we'll probably pop it up in the in the chat if people are interested on Todd's uh get up the um There was a really cool tip in there, uh about and I might break this out as like a separate circuit python harcic tip sometime Which is uh detecting which board it's running on so there's chunks of codes Four versions of the code. I just one it just says hey am I on a macro pad? Okay, then I'll do this Am I on the fun house? So that's a I think a really useful tip for people who are gonna try to Bring their code to a few different platforms. Uh, besides the fact that it's just a really fun and cool Uh, I've got mine right here in fact a very fun and cool asteroids Uh Yeah, as a as a long time lover of asteroids I'm pretty sure this is exactly what's going to be on my pie badge the next conference. I'm at Forget my name. It's going to be asteroids Very cool. All right. Thanks for bringing that by Todd. Thank you Todd All right, let's go ahead and go back to melissa Hi, I think uh, I've been I had a couple of usb reports going on my macbook and I think they're having issues Looking good Uh, let's see. I have uh, okay. I don't know how much of the previous part you saw Uh, but I have this board here that I have for programming these little smart switches And I have a little macro pad here and hopefully this won't crash because I think I actually have a short on my macro pad usb port Um, so I have it so like I can press the buttons and it'll Turn on and off the lights and update the statuses Wow, nice and I'm here and I can adjust the brightness with the little knob And that's just using home assistant and the way that it's able to connect a home assistant is I have a Script running on my computer and it's using remote procedure calls in order to Go ahead and talk to the computer right on and I have a guide out for that now and that's live Excellent. Very cool Thank you for sharing that so with the home assistant some of that is uh Via wi-fi to that switch. Is that the communication to there's no wi-fi. Well, what's happening is It's connecting. This is talking to my computer and the computer is doing all the networking. So The i'm sorry. Yeah, the switch itself has wi-fi. It is okay Yeah, and your macro pad's talking to your computer computers saying, uh wi-fi things to the light bulb Exactly and it's just using home assistant to do all that wi-fi stuff That's an excellent way to add sort of networking to the macro pad without actually adding any networking to the macro pad Exactly Yeah, it does work really nicely as a usb device So as long as your computer has the uh smarts to do all the wi-fi things you're said All right nicely done and you said there's guide out now. Yes Excellent put a link in the chat. Thank you so much. Well, yeah, all right Um, so next up. Let's go to lis Hey, how's it going? It's going well. How are you? Good. Um, so I always wondered if I could get um, like do a teleprompter app for Raspberry Pi um, so this is using um tkinter to uh Load up like a little gooey. So I've got a button to open a text file and that opens it into this scrollable box and then I've got some Buttons using uh blinka where I can start the scrolling It's a short script just to test it out And then two other buttons can affect the speed and then another button Can toggle between I can get under my nest of wires. Um And not short anything It will toggle between going full screen and Going back to max because I'm hoping to do this is like a headless thing. Um, yeah, we'll like load on boot. Um, so yeah experiment So you are you said you're using gpio pins to do uh the controls and then the the Code this is I I'm guessing python script that's running this is Just doing what you need on button presses Yeah, so there's like, um, there's actually two uh two python scripts running one is the tkinter app and then the other one's um a blinka app um for the digital io stuff And for those who don't know blinka is what allows circuit python libraries to run on single board computers like raspberry pi Yes Excellent Very cool. So are you um Do you use like a beam splitter to reflect that in front of a camera or kind of set it behind a camera as a teleprompter? Have you have you used that for videos that you shoot? So I've actually never used a teleprompter. Um, so this is kind of like my way to try it out I am like that designing up a case Uh, I can put my toggle my camera Um, so this was like a little test I did last night to make sure the screen was gonna fit and um, so it'll sit like this Uh, and then the screen will be facing up Sorry like this. Um, and then it'll have some uh, it's like the reflective um acrylic Um stuff so slide in here. Uh, so this is just a little piece to test the fit And so it'll sit for the camera and I'm hoping to have like a tab that comes out the back that can um Kind of go between the tripod plate and the camera. Great very cool to see in that that'll be nice and and uh, I'm sure you'll be able to Do some uh write-ups and videos so people can see how to build their own hopefully Absolutely. Yeah, this will definitely be shared. Yeah. Yeah. Fantastic Thank you, Liz. Thank you. Have a good night. You too. All right. Next we're gonna go to Micah Hello Uh, hold on. Yep. There you go. Um, hello, so I've got a little bit of a Not complicated project the project itself isn't complicated, but the backstory kind of is Lay it on us So a neighbor of mine, um Sorry, my mom is walking around Um a neighbor of mine uh has a really pretty dog really nice dog and Because it's it's like one of the hottest summers in a while. It's um, the neighbor wants to or he wants to um have a dog kennel It but he wants to be able to leave it like to go on a road trip so The dog kennel company makes a fan But it's 300 or it's like 200 dollars for whatever reason But he wanted me to make a remote control fan that um, can it mount to the dog kennel and I did so Very cool. So tell us about it all right, so I'm holding my laptop because I don't have an actual camera. This is an ate a fruit box Uh-huh that I'm using as the enclosure and this is a fan from amazon it gets really fast and If I take this battery These are xt 90 connectors. There's really heavy duty really overkill for this project, but if I look it in The fan turns on for a second because there's actually a cutie pie in here um sam b 21 version so It's booting up and it is running circuit python, which honestly, I'm not sure Is advisable over arduino for a project that controls like a motor that can get really fast, but circuit python is awesome. So I've got this little key fob from ate a fruit and if I press So it's on button a right now. It's a toggle. Um rf switch so It's on button a so I press that nothing happens. That's the off mode by press button b then comes Oh, we hear it. Yeah. Yeah Yeah, so it gets pretty loud so just just know that it cycles through um three different speeds and one off mode but if it would like Only be quite loud I mean I can try but This is speed um two And this is speed three Oh, you just take off right off the table. I love it. Yeah Very cool. Nicely done All right, thank you. Thanks for showing it Mike. We'll see you next time. All right. See you Bye later. All right next we're gonna go to you dco Hello You're our last caller for the night. So we're excited to see what you've got. Yeah Oh, okay. Thank you John Park. So me my father made another project So we live in a condominium in an apartment. I don't know how do you differ this in in the u.s. But uh It's like a community so we can like put loud things here and we use the the drilling machine a lot and so we did this talk regulator For the drilling machine in a secure that looks like this. We built the components in this So there is a potential meter here where you regulate. This is like uh electrical outlet that we we did and it connects to the to the electricity of the house, so I will show you the noise that it will make And also this is nice because this doesn't have support for Screwdrivers so we can connect the screwdriver and make it slow so you can move the oh, yeah So So I hope you like it. That's excellent. Yeah, so you're doing all the uh speed regulation with that Uh outlet is it is it a variable ac? Is variable uh Well, my father is the one who made the circuit. He knows he knows a project. I only helped him to to To build it so Maybe I cannot answer this question now. I didn't look at the circuit. This one, right? I asked for engineering, but this one I just helped him to Build with him Well really nicely done. Yeah, you've upgraded the drill significantly. You can use it as a as a driver and a drill That's great Okay, thank you very very nice. Thanks for sharing it. We'll see you dco Bye-bye Hey, hey click clicking buttons over here. I know I think it's gonna do it right can you I think uh Just got a couple minutes before the next show. There's gonna be an ask an engineer tonight, right? Yeah, there is fill in the more we'll be here uh to Talk about all kinds of things answer your questions at the end of the show They're known to do that. They are So we'll give them some time to get set up and we'll get out of here But we want to thank everyone for coming by and showing their super cool projects tonight. Thank you And if you want to learn more about those projects people are uh over on our discord chatting about them So you can head on over there and tell people what you think and again, and that's adafru It slash discord to join us and we are around all week. So you can show and tell your projects at any time Uh, hang out there. Yes, that's absolutely true. All right. Well, thank you catney and uh, we'll get out of here Bye. Bye. Thank you jp. Later