 Hello, and welcome to the Adafruit Show and Tell. I'm Liz. I'm going to be your host this evening. If you would like to join the stream to show off your projects, what you're working on, you can go to our Discord server at adafruit.it slash discord. And there is a link to join. But first, we're going to hear from some Adafruit folks. And then we'll hear from you wonderful folks in the community. And we're going to kick things off with Scott. Hey, Liz. Thanks for having me. Of course, yeah. Doing pretty good. I declared today while I wanted to have a Neopixel day this week. That's kind of day. Is that every day for you? Probably. Kind of. Today was Neopixel day. I was checking Neopixels with the ESP chips, specifically. We had talked about some of them not working as well. So I just redid how it works. And so I wanted to just do some testing. And at home, I had been using an S2. And I've been having issues with flickering. So let me switch to my bench cam. So what I've got here is I've got a Neopixel strip here. It's one of the 160. It's 165 Neopixels. And this is a tiny space. And what you can see is that this only happens when Wi-Fi is on. So Wi-Fi is on. And you can see that it's flickering green, even though it's a red comet. So that's all sorts of artifacts that are happening. And that's because the transmission is not able to keep up as the Wi-Fi is interrupting it. So I've got a fixed version. So let me just go into the bootload mode real quick. And let's just see if I have fixed it. Well, I'd fixed it earlier. So I'll show you the fixed version. I'm just loading it using the UF2 bootloader on this board. It's bleep, bleep, bleep, bleep, bleeping. All right. So it's copied over. And it should get going. It's got to connect to the Wi-Fi again. OK. And now it's going. Oh, and it's broken still. Oh, no. Oh, you know what? Actually, that's a good example. So it just showed me the circuit pie drive. So if you look when it first started, I did get some green artifacts at this time. That was when the file system was being accessed, which is like a harder problem to solve than when the Wi-Fi is going. So I haven't fixed it when the disk drive is being accessed, but I've fixed it kind of in the steady state of just running your user. It looks way better, yeah. Yeah, I saw it pop up. I was like, oh, yeah, like there's a whole other level of difficulty when it comes to when the flash is being accessed, because that's where your code lives as well. In this case, yeah, it looks a lot better when it's just like kind of steady state. It was flickering even when the Wi-Fi wasn't actively doing anything. So yeah, I'm excited to get this checked in, and there's a PR out now to improve it. Excellent. That's a huge improvement. Thank you for working on that. Yeah. Yeah, I was very happy that I was like I tried a number of things and they didn't really help, and then this thing helps. I was very excited. Excellent. All right. Well, thank you so much, Scott. Thanks, Liz. Have a good one. You too. Next, we're going to hear from Melissa. Hello. Hey, Melissa. How's it going? Good. I've been working on the Snake Eyes Bonnet. The code that is in the guide for at the moment is kind of old. It runs on 32-bit Raspberry Pi and was designed to run on some of the older Pi's like the Pi 1, 2, and 3. And I believe it ran on the 4 as well in the 32-bit, but I'll show you what I have for a little demo. I've been, it's not quite up and running on the same way, but I just have outputting to the displays here, just some red, green, and blue, but it's running on a Pi 5 and 64-bit. That's awesome. Thanks. Sweet. So I'm hoping to get it to connect with the Wayland desktop and get it to show images of that on there soon. Awesome. It's been great seeing you work through all the Raspberry Pi things, get everything working. Sure, folks really appreciate that. It's been a nice learning experience. Yeah, definitely. All right, well, thanks so much, Melissa. Thanks. Have a good one. Now we're going to hear from Trevor. Hey, Trevor. Oh, you're muted. Can you hear me now? Yes. Awesome. All right. All right, cool. So this is what I've been working on. This is my, well, this is our app that uses Adafruit IO as its back end. It's called Whippersnapper named by Chainson, who knows. But basically, this app, you can send values to your feeds in Adafruit IO. Let's see. Let's see a quick little demo, NeoPixel. So when you get into this feed view, you can basically see the past history and whatnot. You can also send values to that feed. And let's see. Let's send over a little color value and boom. Wow, look at that. Wow. Super fast. So yeah, I know. So yeah, so basically that's what we're working on. And you're planning on adding widgets to this app and possibly a home kit. So yeah, exciting things. That's awesome. And I love that you have the color wheel, too, because folks that have been using Adafruit IO, like they're used to having that. So they'll be able to do that. And I know personally, I've always like, I don't like going to the browser to do it. So to have an app, they'll be able to access everything. It's relevant by you. So. Thanks. Thanks. Thank you. All right. Thanks so much for that. All right. No problem. Wait. Now we're going to hear from Erin. Hey, Erin. Oh, you're muted, I think. Do you want me to come back to you? OK. All right. Well, Erin gets her audio sorted. We're going to hear from Nanographs. Hey. Hi. Hey, everyone. Can you hear us OK? Yeah, sound good. Yeah, so we don't have a chip in the microscope today. We have got some diatoms. These are from a commercial filter media. So diatoms are kind of nature's filters. And so if you just kind of grind them up in bulk, you can filter things through them. And so these ones are not from the ocean, like some other diatoms with it. Oh, that's not it. They're an industrial product. But what we're going to do is just cut one in half. We are currently searching for one. They are big and round. And they will really stand out when you find it. OK, very cool. Yeah, so these diatoms have been modified with, I guess, I don't know, some sort of chemical things that are not diatoms to be even better at filtering. So you see some of them just have like, kind of looks like they're just covered in little scraps. Oh, OK. The other stuff. Very cool. So yeah. And then we were going to, oh, I think I see one in the bottom corner there. OK, cool. And then what we're going to do is because this is an ion beam microscope, instead of an electron microscope, the ions. There we go. There's a diatom. Oh, wow. OK. We are going to actually slice this thing in half real quick. Yeah. Oh. So you want to draw the ROI? ROI stands for region of interest. It's kind of a common, same one scanning. OK. You want to get a before picture? Yeah. I was trying to click on the window in the side of our screen. Same picture first. Yeah, cool. OK, so now we're going to, this green rectangle is going to be where the beam is scanning now? Oh, wow. Because wherever the beam is scanning, do we want to do it down there? That's where it's milling. Well, we're going to the stage vertical because we're, I think we're currently tilted. So I'm going to increase the beam current now. So we're at 30 picoamps. I'm going to go to 1,000 picoamps. I'm just going to kind of blast this half of it away. OK. And so as we. It has all these little pores in it. Yeah. So it's just a naturally functional organism. But then it's also been made into this man-made mixture of filter materials. Do you want to try and do maybe just like the top of corner so we can do it faster? So the smaller area we scan the faster, like it blates the sample away. Oh, OK. Yeah. Yes, it looks great. We already kind of took a chunk out of that part. So if we watch that any second, we should just like blow all the way through it. This one is a particularly resilient diatom, it looks like. Not all of the other ones we tried today like melt away a lot faster. It's been treated with. It's been treated with something. Other things. There's no more organic diatom. Like it's also supposed to remove acids. Yeah. Well, if you want to pop somebody else and maybe pop back and we can show the show the carnage at the end. OK, sounds good. Yeah, let's go back to Erin. Hey, Erin. How's it going? Yes, I can. Excellent. Hi. So I've got a furry friend with me today. So this is my new project. I just launched a tutorial about this over on the learning system. And it's fun fur that's just stretched across a matrix that I made out of dot star strips. It's running WLED. And WLED is a really cool app. I've got it here up on my iPad. It runs on any Wi-Fi enabled device. So you've been on your phone, computer, anything you want. Even works with Alexa, Philips Hue. It's a really cool free open source app. And it's got all these really cool patterns on it. And a whole bunch that are made from matrixes. So as I can just click through and select different ones, then it just happens in real time on the board. It's working over Wi-Fi. Each of these has little sliders. So you can change the scroll speed. And you can change the shapes of them and the colors, choosing different color palettes. It's a really cool little app. And it's a lot of fun to use, super easy to set up. And it doesn't require any coding at all. So you just basically plug it in, install it, and then you just have it work in. So if you ever want to just play with LEDs and you're not a cookbook, there's a lot of cool stuff you can make with this. So yeah, check it out. Very cool. And I don't know if you've ever seen the movie Get Him to the Greek. But ever since you started working on this project, there's a scene where it's like stroke the fuzzy wall. And that's all I've been able to think of. So my wife, check out. You can make a little face on it, like I was making a curly mustache and my little eyes. So it's pretty fun to play with whether you're playing with the software or just petting the thing. So it's really cool. We're putting it, I think, in our 10-year-old's bedroom. And she's just in over the moon about it. Love it. Love always seeing your light-up projects, Aaron. So thank you. Thanks. Have a good one. Now we're going to go back to some lasers, I believe. Yeah, Ion beams. Ion beams, yes, of course. Yes, part of it. It's actually gallium ions. Gallium is kind of a liquid metal. So if you wanted to remove the ROI, I will switch back to a lower beam current here. Yep. So we're just going to see the results of our actions here. What did we do to this core silicon creature? You're going to do a 10-24? And yeah, we're going to chunk out of it. So then I'm going to tilt the stage back to level. So you can see it's inner structure there. It's pretty dense. We've got a lot going on. So the advantage of using ions over lasers is that the smallest laser wavelength is about one micron. Because light waves oscillate back and forth. But here, we can get down to like five nanometers. So like much, much smaller beam diameter than we can. So the ion-based microscopes can modify the sample at the resolution that electron makes with an image sample. They also happen to be able to take pictures. But the entire time we're taking pictures, it's also ablating away the sample. I see. OK. So we just kind of work quickly. So we can kind of see there is like that. The inside of a diatom is kind of a honeycomb structure. Nice. Nature's filters. So this thing was like not, this actually wasn't extracted from the ocean. It was like dug up somewhere in the middle of the United States, probably, because there used to be an ocean there. And then all the diatoms that died sunk to the bottom of the ancient seas. And then we go mine them up later. So yeah, it's a diatomaceous earth. You'll kind of see it as a lot of times. And it's just little tiny things that were once alive and are made out of silica. And I think they're filters. Yeah, they're pretty unique and great under these kinds of microscopes, because they make their cell walls out of silicon. So we can image them just like we would image chips. Yeah, it's a biological silicon instead of a man-made silicon. Nice. Well, thanks so much for this live demo. Yeah. Thank you for giving us an opportunity to share it. Of course, yeah. Great to see you folks coming on more often. Yeah, we're happy to have the shop to share it out of now. And internet, that's important. Yes. All right, thanks so much. All right, that's going to do it for our show and tell. Thank you, everyone, for coming on. But don't go away in about 15 minutes. You're going to have Ask an Engineer live at 8 PM right here. But until next time, have a good week, everybody. Bye.