 Hello everyone, it's me John Park and we are ready to get started with another evening of show and tell We've got about a half hour to show some projects people are gonna come by and Give us a little tour of something. They've been working on which is always a lot of fun I'm excited to see what people are up to and First of all, I'll say if you're wondering how to get here if you want to show something or tell Head to our blog. You'll see a blog post about show and tell or go to our discord And there's a link in the discord you can join up and we'll bring you right on in so First off, I'm gonna bring on our good friend Kevin Walseth from digikey. Hello Kevin. How's it going? Hey, John. How you doing? It's going good. Well, I am Obviously not in my home office. I am actually at digikey headquarters today And it's not just a green screen effect. This is somewhere you really are It is not I am in the skyway between our old building Our legacy building and the new building that we should be launching We've got some testing going on and it's being used a little bit, but officially launching early quarter one of 2022 so it's really exciting I can't wait to actually walk around and one show and tell us and show you a little bit more What's that behind you there? Is that a conveyor belt or something? It is a conveyor belt So this is a conveyor belt that door behind me right there Yeah, it's going into our legacy building our old building and if I spin this way this conveyor will run parts between the old building and Way back there is the new building. Oh, that's really this is a skyway impressive top of a road and The thing I actually want to show and tell the reason I'm in the skyway. There is a reason for it I'm gonna switch my camera and flip it around really quick Okay, can you see my other camera? We see it. Yep All right, I'm gonna try getting a shadow here So up in the window 20 months ago I created this sign up in our window all of these letters are about three feet tall Oh, wow, and I just I decided to come in the office today and make it a little festive and This thing has been going it's been going for 20 months straight. It has not shut off Oh, and it's excellent each letter has its own circuit playground express and 240 neopixel strip for each letter Wow, it's been it's pretty impressive that it's not turned off That's terrific. I had so I had one power supply go out during the entire time That's impressive. So the the skyway here It looks like if you get a good head of steam You could take a scooter or a bike across that or if you're feeling lazy Can you just hop a ride on the conveyor belt or do they frown upon that? They definitely frown There are bicycles around there are I know there are some motorized scooters. I haven't actually used one. Yeah, but It's it's an impressive facility and like I said, I can't wait to do a tour of what it looks like Inside the building. Oh, it's great. It's really really dark and actually it's Minnesota and it's raining out right now So it's really hot, but if it was light on I'd love to show you the entrance, but maybe another night That's unseasonably warm if you don't have snow, isn't it? It is it's been 36 degrees today, and it's supposed to get down to I think around one or two tonight. Whoo. That's not enough degrees. You know, no, it's not Sorry about that. Well really cool. Thanks for the tour through through just the Connector and we can't wait to see the full building itself when that's ready for a tour Yeah, and I can't wait to show you and like I said, hopefully early 2022 I can get in there and Give you guys a sneak peek of where your boxes come from. Yeah about five minutes before the show there's Totes coming across this conveyor. I wish it was running while I was here. Oh, that's neat. Yeah Yeah, I'd be really cool to see when it's in action. Excellent. Well, thanks so much Kevin. We'll see you next time and Have a happy holidays and happy New Year if I don't see you before then and you do the same. Take care everybody. Thanks All right, that's pretty dang cool. Next up We've got our friends Chris Young and Bill Binko to talk about an assistive technology project Let me bring These guys on hey guys and let me know if and when you want to share screens and I'll pop up I can only do one screen at a time. Sure. That's good. That's good. How are you guys? Great to see you John and Chris could glad you could make it So we actually had an eventful week over the past week and Not something we wanted to be doing at all, but I'm really proud of how it turned out I know that there's gonna show the there's a video I made of it that Phil's gonna show on Ask the Engineer So I won't go through all of the the whole shebang here But basically if you guys remember you can share my screen here for a second If you remember when we first started working with you guys we were helping a little girl named Ella Hunt to drive a power chair using two switches and the The the problem was she only had two switches to drive and that wasn't enough so we we created a device is one of the first things we did at AT Makers and Unfortunately Ella went in about a month ago to have spinal fusion surgery and everything went wrong. So She came out with her cognitive function intact all her personality still there. She's still super cute goofy kid But she definitely had severe Hypoxia lack of oxygen and one of the problems that came out was her fingers that activated those switches Like they used to So we actually did a Big event. We had all the engineers at AT Makers Got invites Dan Halbert helped us from from Adafruit to come up with some kind of new switch for her And so we put together this ridiculous This ridiculous Sweet of thing test with her to see what would work and we found some that worked And because Chris is in Indianapolis, which is down the road. I Went down there after we had done some measurements We show you here Judy Spoonover occupational therapist and I went and tried all the sensors and figured out what would work with her and then I went down to Chris's in Indianapolis and he and I worked to make her a solution Chris you want to show what we did? Yeah, you can switch over to my screen share. This is a little forest gauge As you put your finger on and we made over 3d 3d creative out for it and dining Dmitri, what's his last name there a voting check from Google? Yeah, Dmitri wrote you put together this little first page and The problem is she can't lift her finger off of it It rests there, but then she can apply additional pressure. And so that's where the fourth page comes in and So she she was able to screen Operate that and we'll show you in the video very asked an engineer. They'll see her operating her eye pain and really Really lighting up the type that she's up to use of the finger bank That little mount that we made there that was sort of a hurry thing to I designed a new case with a battery and a feather and a relay wing and Then You know this pivots do I ever hang Do you need? Well, we'll ship that out to her. Yeah replaced the one we have then do you want to show the one on your on your cheek, Chris? Oh, we do You notice that right thing attached to my glasses on the end of that is a PCNL 4040 infrared proximity sensor and When I went by I didn't go back to the spin chair You'll see this graph. I went by I grabbed close up. I realized my eye goes back down again So it's sensing my cheek position. That's great. Yeah, and we made one goes for Ella as well And she was able to actually So now she has the touch sensor on a force gauge plus the cheek sensor And both of them are working really well Before I go this is an anniversary for me On showing town back in December of 2012 and that's me and so on the more they were hosting so Their apartment as you probably tell me that's really great Neither sir or I have that much dark Things have changed a little bit. Yeah Yeah, we're so glad that you you started coming and have continued to join the the show and tells that's really great Last from the past. Well, thank you guys and thanks for sharing some of the behind-the-scenes on the Sensors and mounts and the effort going into that for Ella sure to stay tuned for the video Yeah, definitely It's really terrific. Thanks guys Likewise, thanks guys. Hey, bye. Bye. Bye That's fantastic. Yeah, definitely stay around for ask an engineer after this show and you'll get to see the full video of That and Ella putting those two new technologies to use All right, let's see next up. We are gonna bring on knowing Pedro and See what's new over there. Hey guys. Hey, that's Jay. Oh, man. It's a heartwarming. Here we go Yeah, so this week we're showing off the awesome app that Trevor and Antonio and Scott and hope much of the other people at the course or get Python team I've been working on this is called Piley and glider. So first Piley Has the ability to send over like some of Project bundle files are on the learn system. So you can just send those over to our at the only enabled of Bluetooth That's cool enabled boards and it's cool. It's not a special uf2 It's just like default, you know, it's like a Python 7 so that's freaking awesome And then the other one is glider, which allows you to on the go. Yeah, bring that up a little bit huh So you can check out the the directories that are on your circuit pie drive and edit the code on there So if you're like an educational setting or you know cosplayer on the console or and you got a change sensor valleys around or like The color doesn't match or it's too bright or something. You can go ahead and just wirelessly over there switch everything around So super cool. Just change the color there Oh So cool No, I think the coolest example that we show in the video is Going on to our dropbox grabbing a wave file downloading up downloading that Directly to the circuit pie drive takes a little bit I didn't you know that I showed downloading it to your main iOS device because it's a little bit faster But that works proof of content Awesome like, you know, this is stuff that like makes me jump out of bed and you know keep working Like that is fantastic. I can't wait to play with this and this is it's kind of how It should work and it's kind of thing that you know I don't mean to call anyone out, but Apple has been battling people doing this sort of thing for so long like come on Why is it taking this long to make it easy to go from a mobile device to a microcontroller? Yeah, they had to Antonio and Trevor had to battle a couple of the other They did it it's over the goal like really MP3 is like you could view all that and it works with the the native file Files app whatever. Oh great copy and paste through there You know just the way you just you know can hold a tap hold copy stuff over you can paste it right Okay, that's really cool. I I Have I've been aware that this has been in the works and I haven't touched it yet in 2022 I can't wait to dive in Play with this because because this is really really helpful Yeah, the beta for both of them is up right now So folks want to play with it and test it out. Please do so we have links in the YouTube video We'll post the link in discord too. Yeah, we forgot your we didn't have the file glider guidance or download file We can check out the test plate. We'll post the link in the right Yeah And then real quick really wants to show off real quick the yeah for next week We got a little so you've seen some acrylic signs. We've done before so this kind of takes many of them and stacks them together So we have eight of them here I got a cutie pie RP 2040 running it and it's just a single neopixel strip So the idea is to take a neopixel strip and a little 3d printed diffuser bit that kind of isolates the LED So they don't leak into the other bits and then this little great piece on top Just has a little slot that fits a quarter inch acrylic Yeah, you could laser cut these or you could maybe play around with like a lithophane litho pain type style thing That would look really cool, too But the idea is just to have like a neopixel strip and then and then put some nice little signs on it So you can kind of stack them to make like a little animation So that's gonna be next week's project Thanks. Yeah, hopefully we come up with both the video guide this week Good luck. It's the race to the end here at the end Yeah, yeah, so hopefully the last one for the year so good with the world 2022 on there Yeah, nice nice one. All right. Well, thanks guys so much and Have a good holidays and New Year's and I'll see you soon. You do likewise. Bye All right, next up we've got our own Scott 10 news been busy putting links up in the chat. Thanks for that No problem. Hey John. How are you doing? Good. Thanks. What's new? Oh? Well, the pie leap stuff has been in the works for a while and I put those links in there folks want to try it There's definitely bugs still so let us know and we're gonna have to get a process for figuring out how to help folks debug But please give it a try it is I think very magical when it works. So Very exciting. So give that a shot What I wanted to show today was I was actually I use a split keyboard and I wanted to try a different one. So I got this is half of a keyboard And this is a softball so FLE. Maybe that's the right way to pronounce it. I'm not sure This is the first time I've used a kb2040, which I'm very excited about and I think the first time I've used key matrix as well So I've got the other half on my desk here that I'm working on and I'm hoping to make like a very simple example that uses the QMK Configuration editor so that when I want to like switch my keys are what my keys are I just go on to the QMK thing and switch it there and then download the jason file Right. So people don't know that's a that's a web-based configurator that lets you graphically decide what keys do what and layers of keys right and then you're Sort of leveraging that to get a jason file out of the end of it, right? Right That's terrific rather than the way that it works currently for QMK is you would actually date you would have to rebuild your whole Yeah, for QMK firmware and reload that right a new thing, but You'll have circuit python and a jason looking at that as a key map essentially or yep I do you do you read a jason or do you convert that into a pie? No, I'm just reading the jason file. Yeah straight away the night It's nice. It's only like a 5k 5k jason file. So it's very straightforward the one wrinkle I had is that like In keyboards you have like columns and rows, right? And you can number each one based on like where it is in the column and then what row it's on But there is a little wrinkle in the numbering compared to how the layout the QMK layout is so like my bottom rows all messed up Unfortunately, so I've got to figure out how to handle that like one last piece of like the QMK mapping not mapped mapping directly to the The now rows and calls them rows and columns But then I think it'll also be handy. I was thinking about making a like utility class that that handles all of the Q and K style stuff and Interference it back into like our usb stuff as well So like in the layout it will have like KC underscore a right for the a key And so I'll I think I'll make a library that converts that that string code key code a into the a Yeah, excellent. So I'm hoping to maybe over the holidays I'll I'll polish this up enough to swap out my existing keyboard fun Snazzy-looking keyboard and is that usually a like what's the connector? I Always forget this. How do you connect the two halves of the keyboard? It's usually a TRS TRRS Cable, so I'll show you both. So what's cool is that it's actually the same PCB twice Just flipped over need Which is pretty cool. And then this of course has a case as well So I can actually test each side on its own and they have two independent KB 2040, so I'm thinking a lot about also like What sort of like protocol you talk between the two and I have some weird stuff on my mouse as well So the like three microcontrollers kind of need to collaborate on deciding what the keyboard And with those you plug in one KB 2040 over USB and it handles half of the key stuff and the other one is just talking Cereal over the TRRS cable and yeah, that was my plan is is over the TRRS I think I'll just have a very simple like you know It's a it's each bite says it's a press or a release of a particular code And then everything else happens on the other side neat Although like it also makes sense to just have both do their own side over USB in case you actually like you could Theoretically have them both plugged in and acting independently. They just can't influence the other side then yes, right, right? If you wanted to do lighting things or Right or like macro layers where you're like holding it holding a button on one side Cool you're you're you're into a deeper level of keyboard stuff with that. It's an interesting. Yeah, yeah I don't want to I there's a great project called KMK that's very comprehensive with all the Q and K stuff But I'm hoping to shoot for the like minimalism side of things. I dig that yeah, which is where I tend to end up I tend to build from where from the Python layer out Good great. Well, thank you so much. I'm gonna get get get you out of here and try to whip through some We have a bunch of great-looking guests on here and just a couple minutes per guest will do it Thank you Scott so much. Happy holidays and we'll see in the new year All right next up we got Todd bot He is everyone's favorite robot and personal friend of mine. Hey Todd. What's new? Hey, so I've been playing around with the oops the mazzi sorry the oscatone scout and I've been Installing mazzi which is a really old but comprehensive synthesis library for Arduino and the the inside this little little oscatone This is this is what it sounds like normally Okay, it's cute and so it's cute. It's cute. It's it uses the Arduino tone function and Because this is internally just the same as an Arduino Uno. It's like super simple, but um with my my with my experiments with mazzi scout. I have decided to Change it a bit so it sounds a little better. I think and and so Oh Yeah, and and this actually has there there's no their UI besides the keys So I have it on power-up. You can select different sort of settings. So in this in this setting It'll do this sort of like filter modulation Wobbly yeah, it's very nice and you know in this setting it'll do triangle waves instead of Instead of smooth and then this one has like no filter modulation Oh, except sorry a very slow But this is um in the software it's pretty amazing like like go back to my screen share for a sec um So in the software mazzi has these objects like oscillator ADSR low-pass filter and then you can just do things like set the frequency of the filter modulation set the frequency Sorry, set the various levels of your envelope ADSR um In the key thing when a key is pressed it just does Oscillator set frequency and then it's MIDI to this is a little MIDI to note function They give you to create a go from like a MIDI note to a frequency of low frequency And this has two oscillators with one being slightly detuned. So it has a nice little Yeah, yeah, yeah. Oh, it's excellent. Yeah. Yeah, and so so this is all on an arduino class device It's just sort of nuts. Um, but if you want to play it's a 328, right? Yeah, yeah, 8080 mega 328 from 2006 basically But but uh, but the the uh oscatone scout plans are all open source But I bought this kit because I wanted to support him because he's awesome Um, I built the kit and I'm like, you know what I've always wanted to play with mazzi And this seems like a great platform for that so Very cool. And you did a little bit of a hack to uh to to talk to some pins differently, right? Yeah, one of the one of the how I'll lay down on the board Yeah, one of the problems is he used pin nine, which is uh, sorry pin 11 Which is in a lot of the arduino tone examples But mazzi because of the way the timers work on the 18 mega 328 Uses needs to use pin nine for timer two and so If you if you open up the the the board and kind of bend out the pins and solder them around You can sort of swizzle like do a hardware swizzle of pins nine and 11 And um, and then you can use all the mazzi code that's out there that works for arduino Great hack. Uh, I want to try that. Uh, I I wish we could we could hear some more from you But we got a run. I'm gonna bring on some other guests. Uh, thank you so much for showing that All right, next up. We'll bring in uh, chelsea and carl. So get ready Hello Hi We've been playing with your stuff for a while making a board with led light This is our newest board. It's a christmas tree and We're running it. That's a nice looking tree We're running off On your your td plie and your feather board. Oh, that's 20 40 Those are gorgeous. And so Yeah, we'd like to send you one as gratitude just for a holiday chair. Can we send you guys something? Uh, yeah ping us on uh on discord and uh, and we'll chat. That's really cool. Yeah So are you using uh, like cutouts and backlighting? How are you getting it? It almost looks like different sizes of ornaments on those Uh, they're well, this is the same. Um, it is it's a lighting that we just did a pc board very low cost and Our chip is on great. Are you the chips on the back? Let's see Chips on the back. It's a led driver for And we got a stemma connector. Yeah a couple leds on here for power and Put one on the data line so you can see the data activity Is one of the features with our chip is very low data to do all the stuff that is great You have really advanced the art of the uh, the led christmas tree here. These are great And we're also doing a little tiny indicator part. This is a two by two chip to do RGBs Oh, yeah Like if you needed a product that had some like battery indicators or something's like that on it very nice That's running also on your t5 Really great. Well, thank you so much for showing that those are adorable. I love them. Uh, I'm gonna have to uh Move on to the next, uh, but thank you so much for showing those. Merry christmas. Happy new year. Thank you All right, this is going to be the blitz round starting with lis blitz city diy Hello, hey lis. How's it going? Good. Thanks. I published a new uh, learn guide today with these midi stomping pads Uh, and there are these 3d printed um squares with some springs and then there's um copperfoil sheets So when they make contact basically like nice Yeah And they're all And the leds change colors Because Love them those are great and did you say your guide came out today? Yeah today. Yeah fantastic. Oh, I'll have to go and look at that Those are really cool And what's holding them together because those are spring loaded, but why are they not flying apart from each other? What's the mechanism here? Ah, all right So they're glued to the springs. Oh, yeah smart. Yeah There's a little indent in the corners Uh-huh it hooks it in hooks the spring really nice. Thank you for sharing that and and for doing a guide on it Of course. Yeah, take care All right, uh, next up we've got uh, about three minutes left and we've got uh, paul tea Hi paul. Hey, how's it going? John, huh? What's new and exciting? Great Well, all the stuff you people are showing so what what do you have to add because this stuff's been great Well, uh, so there's this computer that I've been working on for a while now Called the rivet 65 which there it consists of A cpu Memory et cetera board and then an i o board And I had a an issue With both of those boards where I had to re spin them and uh, I got the re spin back on the cpu board And it was great the re spin It memory I didn't fix the i o board. So I was very disappointed When they came back But anyway, the big thing that I've been working on now is, um, I wrote a disassembler for the computer. So this is just like bare bone 6502 And if I do that Me too That as well. Oh, excuse me Um, so normally if you wanted to look at your code In a machine language monitor you do like a pe o o o and that gives you a page dump and boy, that's difficult to read but, uh I've written this um disassembler. So if I do uh r 87 o o and I've pre loaded the start and stop addresses for the for the, um Um, oh it's going to the printer Oh, that's great. So, uh, I That was unexpected. That was unexpected. I had forgotten that I had switched it. So, uh, basically the Let me stop that the, um The one of the things that I'm working on is a common i o handler for the system So that basically you just pick a peripheral and there's a there's an abstraction layer over it And you either send or receive as opposed to you've got to know how 6551 works You have to know how uh, how uh, you know, the spi or the i squared c or all these different peripherals work It's just this with this i o layer you just pick the peripheral and send the data And so I had forgotten that I had repointed it to the printer instead of the second serial Are you uh documenting this uh process and the build somewhere that people can go check it out Yeah, actually, um, uh, I have a blog ribbit nerding. Um, okay, and it's it's It's ribbit ribbit with yeah, I'll put it in the chat. It's ribbit with three b's Yeah, and and nerding with a three for the e Uh dot blogs dot blog spot dot com. Um, I'm also on facebook, uh, and I've got a youtube channel. So Oh excellent paul. Yeah, it's it's a lot of fun. It's it's been a real learning experience. Thanks. Yeah, that was delightful All right, take care you too. Bye All right, uh, we've done it. We've hit the uh, the mark. So it is time for ask an engineer coming up next So I'm gonna go. I want to thank everyone for all the fantastic show and tell projects you brought on today and uh, I uh wish you a happy holidays and Happy new year if I don't see you. I'll be on uh tomorrow with my workshop show and then uh, and then off for a little vacation So thanks everyone. Uh, freight food industries. I'm john park has been show and tell Stick around for ask an engineer