 Good evening folks. Welcome to Adafruit show and tell tonight. We have two hosts My name is Liz and this is my co-host Melissa And we're gonna start out by chatting with our friends magenta from hackaday Hi, thanks so much for having me on tonight for coming So I'm excited to share with you all more about hackaday's super conference Which is back for 2022 after two years sort of off and remote We're very excited to be back with the community and bring everyone to Pasadena Which is where I'm at right now at design lab We'll be taking over design lab and the music school next door as in previous years To do an epic three-day conference of talks and badge hacking and our hacking village Which I think is really what everyone comes for Comes for the village stays for the talks or comes for the talks and stays for the hacking. I don't know But we'll also have workshops and all kinds of exhibits and awesome things different ways for people to interact and engage So right now we're actually in the call for proposal stage, which is really what I'm here to push for So I think there'll be a link in the show notes or in the chat somewhere But if you go to hackaday.com, of course, you can also find the article that announced the call for proposals that'll be closing August 18th. So please get your ideas in like I mentioned. We're accepting talks workshops We have two tracks where people can submit 20-minute talks or 45-minute talks depending on, you know, their material some past talks we've had are With some amazing I'm sure familiar names people will Recognize Sophie Wong talked about digital fabrication tools for wearables We had Jay Moss and Alex Glow in the past talking about making friends with companion bots Mitch Altman from TVV gone Has told us all about how design and tech can help serve humanity Nick Poole was talking about circuit sculptures and different ways to make 3D structures from PCBs and Quentin Moore, we're also gonna have an epic badge by our very own Boya and to Nick So keep an eye out for teasers around that. We're not really giving too much away yet But hopefully people are excited to learn more and we have a brief video to kind of show What it was like in 2018 so people get an idea so we can play that whenever you're ready But I'm also happy to answer any questions as well. Let's play that video That's definitely making me nostalgic for events So I just dropped the link in the discord and to our other live locations if folks want to check it out And you said the deadline for proposals was the 18th Yes, so the call for proposals will wrap up the 18th Tickets will be going live any day now. I'm like sometime early next week So we'll have an early bird period So people can take advantage of a discounted price that they get in there the first week or two and then Full price tickets general admission will be opening up soon after that We'll also have I guess something important to mention is that we provide Travel stipends for speakers that are needing to travel to Pasadena. So that's a great resource and I feel like they're pretty generous People can Obviously speakers will also get free Attendance to the conference and so that's those are some great Incentives and something I was reminded by with the video is that we do the hackaday prize award ceremony Saturday night as well. And so that's also a big Celebration that's always fun to be a part of it in person just the excitement around giving those big You know the $50,000 grand prize award in person and highlighting all the awesome Open-source innovations that were submitted for the prize this year and in case people don't know the prize is still open And wrapping up we're in the middle of challenge four and then challenge five will be the wild card challenge where anything goes So if you still have a project, you're wanting to get into the prize You know time is not up yet. That'll be wrapping up in Late September early October and so please check out hackaday.com and hackaday.io for all those details I think I've covered everything. Also. I don't know if we mentioned it's November 4th, 5th, and 6th most importantly Those are the dates So we hope to see see everyone there. Awesome. That's great. I went to the last two in-person Act a super crowns and had a lot of fun Yeah, I think Yeah, one of my favorite quotes was Someone I remember overhearing someone saying like oh, it's like walking around here is just seeing like oh this like person I admire on Twitter. Oh, this person. I admire on Twitter this person I admire in Twitter and I finally get to see them all in person. So I'm hoping that everyone is yeah ready for an epic reunion Finally getting kidding day and and work on projects together in person Awesome. Well, thanks for coming on and telling everyone. I hope folks sign up to do Talks and we'll all have a great time together. Yeah. Thank you so much. Thank you So next up we're gonna go to our friend Jay from digikey Oh How's it going? Good. Good. I wanted to show off this thing. I've been working on it for the last two days Um, I'm working on a new robot, of course, but I got really inspired by watching um light year on tisney I'm making a very much story piece. So I wanted to make a story piece that can fit inside my robot So this is my story piece. I made my own, uh, crystallic fusion Container that I'm hoping I can stick in the middle of the robot that I can actually open up the robot You'd be able to see it Sweet Yeah, I use a pretty much 3d printed and also like the container is actually an old school container art container from school And even the crystal inside I use a golden dark filament. So like Kind of see it with my lights kind of bright, but like glows in the dark as well Yeah But yeah, I'm hoping to get everything together for uh, of course the silicon event which of course I would be there And hopefully I see some other people that will also be there. It seems like it'd be a big event this time Yeah last week we had um, I haven't Adam Savage on talking about it. I know so if he's gonna be there He'll be there. So it's gonna be a really good time for everybody. Oh, yeah, it's gonna be great. It's gonna be great I can't wait Nice awesome. Well, I can't wait to see where that tube um evolves into Oh, trust me. It's gonna it's gonna be good Nice awesome Cool. Well, thanks for coming by Jay and uh Next up we're gonna hear from folks, uh, our friends at Adafruit. I'll start off with uh, john park Hey, how you doing? Good. How are you? Great. Thanks. I've been working on a build that I want to show. Uh, so I'm gonna add my little camera view here. Um, so this is uh, a project I've been working on with our community member Jan ghouls be also known as cedar grove maker and jan had done some work on load cells reading them with The na u7802 chip and he built a feather wing that has a dual Dac on it and then Adafruit now sells a little stem of qt breakout, which I actually have On the back Here you can see uh, and so that has the load cell plugged into it and then I've sort of strapped it all to A clue here and this is running jan's code. So jan is working on a guide and he asked if I could Help him with some coffee consulting and some some build photos. So that's the point of this That's what this is. This is actually part of my espresso machine. I have a big old Old style Italian espresso machine steam boiler kind and it has this big drip tray And this is where you put down your your cup when you're pulling a shot And so what I wanted to do is be able to attach the load cell in a way that it's tied down at one end Floating it the other and then I have this little piece of aluminum underneath it that I can set a Adafruit coaster on or something like that And then I'll put the cup on there hit the tear button Which reduces that weight subtracts the weight of that cup and then pull a shot So if I'm doing like a double basket shot with about 18 or so grams of beans in it I should get about a 27 gram pull of espresso This is when you're trying to really min max your espresso and get within certain volumes and doing it in certain times And it's how you know To to adjust your grind. So it's a it's a whole little sort of Nutty world of espresso That I'm involved with and for the first time I can instrument it So I've been doing a lot of this stuff by by feel for for a couple decades now But now I'm going to have a ridiculously Over engineered solution for weighing my espresso as I pull it. So That's the project. It's got a guide coming And you can also adapt it, of course, it doesn't just have to be for this It's going to be a kind of a nice little all-purpose Scale that you can use to weight whatever you want. These are really accurate. This one actually Due to an error in my previous build. I pulled off a bit of the The Load cell wiring and so I had to grab a different one that I had this is a 10 kilogram one And it's a little noisier. You'll see the weight fluctuating a bit But it's actually it's still quite accurate accurate enough to do this So if you use the one kilogram one we get it's it's less noisy Uh, so I'll be showing some of this stuff off and other things tomorrow on the workshop show So come on by uh, it'll be one o'clock pacific time four o'clock eastern time on thursday Awesome. Can't wait to see that and I can't confirm see a grooves library for that. Um That uh chip is really awesome. Can I use it? Yeah, use that for your pet pet? Yeah, oh, that's great. Good. Well, I've been waiting to have this now cold shot of espresso that I made Perfect Excellent, thanks Thanks for coming on john Thank you So next we're gonna go to name Pedro to what they've been prototyping Hey, I don't know what it is about when the coffee gets cold. I just can't drink it But when I order it cold, it's so delicious. I don't know Now I need some coffee Uh, yeah, so add go ahead. Yes. So this is this week's project It's sort of a fun twist on a old kind of thing So this was inspired by the ship engine telegraphs And Lamar kind of pitched this to us and said come up with something So we are using an analog feedback servo and the qt pi esp 32 s2 in the back there And the cool thing with the analog feedback servos is they can keep track of positioning Uh, so we have a little piece of copper tape that is being used as a touch input And these little no g's kind of let the other build know, uh, kind of what you want to do So speaking of coffee, let's go ahead and Move this handle over to the coffee because I didn't need any more. Oh, no, I had a misreading So this one is supposed to stay on the coffee and that was supposed to go to the coffee if I give it a second I think it'll like Fix itself. Um, if not, we could always try this one here Once we want it Yeah So this is uh, there we go It wants us to go on a walk, which is what we kind of need to do Yeah Dogs sitting here like come on. Let's go But hey, it's it's it's all done in circuit python and it uses adafruit.io as the broker So it sends and receives the over two different feats Um, and the three pitted case can be adjusted if you want to make a bigger version of it or whatnot But these are really cool these feedback servos I really haven't used them in a project and uh, it's kind of a neat way to kind of keep track of uh, positioning Let's see if I can get it to Go to yeah, it's my first time using them too and they're really it's cool how They like know where they are which sounds silly, but We're going to blockbuster Cool, uh, yeah, and there's uh if folks want to learn more about the analog feedback servers We have a dedicated guide on it so you can check that out on the learn learn site Um, yeah, it was published today. So folks can check it out and try it out for themselves Yeah, and kudos to you Liz for writing the awesome code It was a collaborative and uh, we also did the sticker paper which um, I had Yeah, it's a it's a good kind of Option instead of having to do the vinyl transfer because I've tried the vinyl stuff that works good for 3d prints But hey, just print it on an inkjet printer. You get nice graphics and colors So cool. You got the printer working. We're good to go. Oh, right What is it with printers? That's a matter of if it's 2d or 3d Thanks guys All right, thanks. Check it out So next up we're going to go to phil b Hey there Um, this is not a new project. Uh, this is something that was a collaboration with the Ruiz brothers A couple months ago, I think but I finally put together my own personal one of these Raspberry Pi led matrix cubes Um Yeah, it's uh, it's just so beautiful in person You know, I have my big ugly prototype over over here, which is like, you know, the prototype is always huge and junky Yeah, but they designed these these fittings for everything and it just goes together so cleanly But uh, also when I was putting this together um I learned some things about uh power and underclocking the Pi little tweaks you can do to get the the uh The battery performance, uh working a lot better So is we are rolling shutter thing going so you're seeing some right in person. It's of course perfectly steady Yes, um, so I'm going to update the guide pretty pretty soon I think with the some some tips I've learned so people make one of these You can keep it running for hours um And it doesn't get outrageously hot it gets warm inside definitely, but uh Yeah, you like burn something down if you're not careful And then you um designed that acrylic cube that it's in I did I I that was just a slap-dash thing Nothing too careful, but I'll put the files again when I add this page to the guide If someone wants to laser cut a case for it The reason I did that is because uh later this month I wanted to take this to silicon just to share around with people And these these matrices are pretty delicate especially along the edge You can just shear those pixels right off And so it's like hey if I if I put this in a box then if people want to pick it up and turn it over because it's totally interactive Don't worry about the pixels getting sheared off Um, so that's the plan Also, I feel like it adds this extra layer of like Extra dimensional coolness to it too. Yeah, it's shiny. Yeah Have you thought about doing uh one of those boxes out of like the led acrylic? I thought about it But what I did in here there's a couple millimeters of clearance so that I can slide the cube in And I don't know if that would work as well with the uh led acrylic Because you know just oh, okay difference. It kind of becomes blurry. I'll try it at some point, but um Head deadlines, so I just didn't clear for now Oh, yeah That's good Thanks Yeah, thanks will be can't wait to see um those updates on the guide and uh folks at silicon will have the Chance to maybe see that in person. I hope so. Yeah great Thank you very much Okay, next we're going to hear from folks from the community. Uh, we're going to start off with Micah Hey, Micah. Hello. I'm going right so What how's it going? Uh, all right. Yeah, sorry Uh, so I've been working on something That I think is pretty cool. I haven't shared in a while, but Um I've worked on something pretty cool that I think has the potential to help people that with the need to fidget Kind of kind of like me because I need fidgets So I'm calling this the e-fidget. It's basically a fidget spinner that will use a circle of vibration motors Mounted on the back to make it feel like it's spinning without actually moving So I'm about halfway done with The entire with the pcb design But I think it's ready to share so I decided I share very cool So I'm designing it in key cad because it's free and I know eagle has a free version, but it's got limitations So taking with key cad because is what I know So I'm going to share my screen Uh, let's see here. Sorry No, okay There you go So Wait, that's not what I was going to share first. Ah wait, uh one second Sorry, um, I don't know where I don't know where my schematic went. I was going to share that Uh, give me one second. I'm so sorry. That's okay. Do you want us to come back to you? Uh, no, I just pulled it up Yeah, let me just share Sorry No, it's all good All right, and now I can go here. So this is schematic Very cool So I wish I could say I designed this all from scratch and it's it's so beautiful because I designed it But I just copied most of it from the rp2040 documentation For the rp2040 is the set is the heart of this project So basically I just made this little line to show that everything on this side I designed Not not much but And then everything here I copied um So basically this is the motor drivers. This is um the control control um piece like it's it's one of the um Rotary encoders from a to fruit that has like the button in the center and then the little okay little um four buttons on the outside and Mounting holes. Yeah, you get the idea. Um Sorry, um So this is a 3d render Which I've spent a little too much time on to be honest But um, so as you can see it's nowhere and you're done. There's parts all over the place but um I Think it could be really cool. So this this is the encoder. I was talking about is that one I love that one barrel jack for power supply. Yeah, I've never used it, but I think it's pretty cool um usd port for programming rp 2040 And then here this is an approximation of where the vibration motors will go. They're just little disc vibration motors And they'll connect to here Um And there's going to be eight of them and I think I think that's it It's just a cool fidget that i'm designing because I think it could help people with who need fidgets who are tired of out of date fidget spinners that are no longer trendy so So what does having the Eight vibration motors on there uh in that pattern do? um So essentially you can just turn them on and off in sequence very quickly And um, okay, feel like it's spinning. That's that's the thought at least Oh, that's cool. Okay I am also a fidgeter So I would be very interested in this design because basically whatever's on my desk Actually, I've just pulled on myself to pen I just grab and play with uh while i'm in meetings or just staying around so Very interesting. So this is just this is something you can slip in your pocket. It'll be powered with a nine volt I think it'll be pretty quiet and That that's about it. It may be halfway done Awesome. Well, I hope you uh, it'll be it'll be a hundred percent open source. So Yes So I like see I hope you come back and show your progress as you continue to work on it All right. Thank you. Awesome. Thanks Micah So next we're gonna go to mark Hey mark. Hello. How's it going? It's going great. How about you two? Good. Good. Good. So not that exciting but um What is going on here is there's a kb2040 Hooked up to a temperature sensor over i2c Nothing that exciting at this point But on the other side now is an itsy bitsy m4 And there's still a couple wires going between it So the there's been a lot of community requests for the i2c peripheral mode On the raspberry pi 2040. So I've now got that working And if I wow managed to share my desktop If you can see that Yes, it's now transmitting the temperature on request Uh from the m4 is asking The rp2040 is responding with the current temperature Uh, you can't see but i'm holding my finger over the temperature gauge right now And it's being sent across Wow So this just I just got it working last night And then there was a pull request with a lot of changes. It's no longer an i2c peripheral. It's an i2c target So that's gonna Um require some merging work Uh, but yeah after a few days of reading data sheets I was really glad to finally see data flowing That's awesome Great work mark. Yeah, thanks. So hopefully by this weekend. I'll uh have something There's a couple others Users on github. I have to thank Ken and I'm redacted. I'm not sure what his actual name is Both started this and got a lot of the sort of framework up and running and allowed me to come in and just sort of help look at some of the Details when they got stuck later on Very cool Awesome. Well, thank you for continuing their work and uh, you always um Do such a great job of uh Bringing things by they're really cool and contributing to circuit python. So thank you Thanks a lot. No googly eyes today. Sorry Good ones. Um last but not least, uh, we have uh my lad. I hope I'm saying your name, right? Oh, no, no Let me let me show my my face. I see sorry. It's my first time here I'm showing that so if I'm trying to take an attitude so My project is the attempt to make computer ices more accessible and affordable for those of those parts with uh physical the disability so the interest you don't know that which uh may be for you So for those that people that are not able to use a target ring or computer mouse on their computer devices there are alternative methods using a devices called sweet interfaces to allow them to be able to use uh computers or a sports console or other devices but these devices are usually very expensive and then uh in those videos I've been trying to make a affordable open source very happy devices but these devices basically require tcb or somebody I'm sorry so I tutored uh tutored one step and then uh I made a basically a module I taught the module stuff other for a time a sports console I made which are a similar uh which module that you saw it to see so basically with these modules you don't need to solder oh it's great yeah because it's a brilliant place and basically you can make the same devices that cost hundreds of dollars but basically on the 40 or 50 dollars nice and then you can make whatever you want to do I have a short demo if we have time I can show basically yeah if you can give it to about one minute just because we are running up on ask an engineer um or if you would rather come back and do a longer demo next week we could also do that but I just do a very short one yeah I'd love to see it and then let me uh tell you something that's me okay I just have a video I just want a video solution do you see my screen yes we can yes so this is my example I'll just show you how fast is it to set it off yeah so this obviously is just on a faster speed but basically do you the input module there are two modules one where you put on one output instead you want to connect it to other devices very cool and then on there and then this is one you just oh great oh okay okay very cool basically just change the entire screen and then finish on the area that you want is everything that's on the screen that's awesome and then you can get screen and then you select the app you want the other switch and then you open up and then the final example so for those first that don't rotate or uh that want to just know how the user perform the term make the device really hard and not attempts so here you can get it by selecting one for them so you can play and then at the same time basically do as I have to use the performance very cool so yeah that's very cool yeah that's awesome and definitely so helpful for folks so thank you for sharing that thank you thank you as you continue to work on I hope you continue to come back um and show us what you've been working on yeah I've been talking come on thank you awesome thank you thank you goodnight well that was a great uh end our show and tell thank you everyone for coming by uh asking an engineer is going to be starting right now so thank you yeah thank you