 The Gray Searcher by DigiKey and Adafruit. Thank you, DigiKey. Every single week, LadyAda, user powered of engineering, WESU, find things on digiKey.com. LadyAda, what do you search for this week? Okay. So this week, I was actually working on this SHT45 Trinky. So this is a board that has a USB plug and at SanD21 and then a temperature humidity sensor and a little Neopixel. The idea is that it's running circuit Python or Arduino and it's programmable, but when you plug it in, it just immediately gives you temperature and humidity data. And people love the SHT45. It's a fairly good precision, a fairly good accuracy. I think it's like 2 percent humidity, accurate and like 0.5 degrees centigrade temperature sensor, which is pretty good. You just plug it in and you're ready to go. And actually, if the prototypes can go to the overhead real fast again, and I can show this. So this is the prototype. So I already built this. The idea is just a reset button. You just plug this way to your port and you have a little capacitive touch sensor here if you want. But other than that, it pretty much just gives you temperature and humidity data. And this chip runs cool enough. And as long as a Neopixel is an on full blast, this shouldn't have too much self-heating. And it comes in a two millimeter thick PCB, a little thicker than usual. Let's see, compared to this PCB, you can see it's a little bit thicker so that it goes into a USB slot and it sticks nicely. It's not as nice as 2.4 millimeter, but that wasn't available for the prototype PCBs. So, but as I was doing this, I was like, oh, you know, it's been a long time since I looked at what available temperature and humidity sensors are on Digikey. During the part shortage, of course, a lot of parts got discontinued or changed or weren't available, but I'm actually glad I did. And I'll kind of show you how I searched for this because there's some kind of new interesting sensors that have been released and are available now. So what we want is, let's go to the computer again. So in this case, I happen to already place this part, but I might do another run. I stock this component and so it's like easy to pick the SHT4 series. I want something that can run on three volts and is I squared C. So I don't want an analog output sensor. I want digital only. So let's go to Digikey and look for humidity sensor. So the reason I'm not looking for humidity and temperature is like every sensor has temperature. Like that's really not a special thing. Humidity sensing them by like measuring capacitance change of this exposed capacitor as it gets damper like the capacitance changes. So, you know, a digital sensor will handle all of the calibration for you. I know people use like the low cost like DHT11 sensors. You can even open them up and see that there's a, you know, this capacitor inside. But those are like very low accuracy, low precision, but also low cost. So we want something a little bit nicer. So let's look for an active sensor. All of these candle humidity sets on issue. Look at the voltage supply later. We'll want surface mount, but I'll pick up also the dash in case that doesn't include some surface mount parts. And then I want it to be normally stocking. And just to make it a little easier, I'm not going to show the marketplace products because I just want to see what's for stock sale at Digi-Key directly. Okay, there's actually quite a few sensors. A lot of these are familiar. But while I'm here, I want to change the output type to be I squared C. Unless I'm going to pick up digital in case like that also means I squared C and then I'll pick up SPI as well. But I definitely don't want like this pure analog or PWM or just SPI. Although to be honest, there's not that many sensors like this. And then next up, I did say I wanted one that would run at 3.3 volts, which is actually kind of like almost all of these fellows here, this is like the only one that isn't. So I'll skip that one, the West work at 3.3 volts. And then, so the thing basically, if you sort by, let's just put in 500 for the quantity, so you get like a quote at like a half real. If you look at pricing, basically what you're gonna pay for is speed and accuracy. So the SHT-40 is like a pretty good sensor, about 2% relative humidity. And I was like, oh, you know, like the SHT-45, if you look, so like there's definitely, you know, plus or minus 3% as well, the SHT-4A, which I guess is like a lower accuracy. Although, you know, the SHT-40 is very inexpensive. And I love the SHT-40, don't get me wrong, it's actually a really good sensor. But let's say we wanted no worse than 2% for, the temperature sensors go always gonna be very good, but the humidity sensors were you. And I want, you know, fast response time. I definitely want 30 seconds, I think eight seconds at the most. So yeah, the SHT-40 and the SHT-C3 are both good. These are both from Sincereon, I believe, yes, Sincereon. And you know, they're a good family. I'll say that you might wanna check the datasheet because the SHT-4 series has there is different base accuracy changes. So the SHT-41 is improved and then the SHT-45 is even better. And a lot of it has to do with the typical and max error. So the typical is what they're gonna advertise, we'll be like, oh, typical is 2%, but the max is kind of what you wanna look at because the max is where it's like, okay, you know, your typical is 2% but the max is 4%. So you're like, oh, cause these all look like the same, you know, like what's the difference between all these? And then if you look at the SHT-45, which is what I used, it's gonna be more expensive. So you're gonna have to scroll down, like sorted by price. Oh, it's like all the way at the bottom. It's not cheap, it's SHT-45. So the SHT-45, yeah, you're gonna see this one is plus or minus 1% compared to 2% and fairly fast response time. So, you know, four seconds. So you'll see each one here, like this data sheet covers all of them cause it's a more recent data sheet. That's cool. They're like, you can get snappy data parts. SHT-40, typical and max, SHT-41, you see the typical is about the same, but then the max is much lower. And then the SHT-43, also kind of like similar to the SHT-40. And then the SHT-45 is where you're gonna get the absolute best performance. It's like the typical is 1% and the max is 2%. But what was neat is I was like, oh, well, let's actually sort by accuracy. So I was like, well, what's the most accurate? Cause like, I mean, you said SHT-45. It turns out there's actually another family of sensors that just came out, I guess, from TI. I've never heard of this. The HTC-30, I mean, it's just, but it's like 2022. But like, they probably weren't available to purchase for like, you know, a year or two. And this is like a really nice sensor with accuracy of plus or minus 5%, very low drift and the temperature sensor is 0.1 degrees C. So this is actually like, I wasn't expecting to find a new interesting sensor. Although of course, the typical versus the max is also not gonna be the same. So the typical is 0.5, but the max is two. And then your best typical rate's gonna be under 50%. So it's like, it's not that much different than the SHT-45. Also at high humidity, it's, you know, it starts climbing up to plus or minus 3%. Still, you know, it's also fairly inexpensive, you know, 250 compared to the SHT-45. And then it looks like I have some discount pricing I got, I don't know. But yeah, so this is my pick. I'm actually gonna grab some of these HTC-3020s. It's good to see a new sensor. I think TI, they had a couple sensors and you couldn't get them anymore, the HTC series. And then it looks like they came back and they're like, okay, we have a new improved one. So like I said, this is, you know, 0.5% typicals. It's great. I don't see anything better. Maybe I'll get a breakout going for this and then we'll also add it to Whip or Snapper. All right, that's the great search. That's great search. Where did...