 Okay, it's time for Digi-Key and Adafruit. Bring you. Hi, I'm NPI. This week's I'm NPI is Panasonic. That's right. They're friends of ours. They're nearby. They're in New Jersey. And today's I'm NPI is a sensor from Panasonic. We've carried their grid-eye sensor for a while and they actually contacted us after we put the grid-eye in the shop and said, hey, we have this really cool particle sensor coming out. And we said, great, let us know when it's available. And they did. And then we were like, hey, this is a very good I on NPI candidate. So we slotted it up and we got one. And it's time to talk about this new particle sensor. So the... Oh, sorry, can you go here? Oh, sorry. Oh, sorry. Sorry. It's the SNGC-J85L. I couldn't memorize that. But this is a particulate sensor from Panasonic. And what it does is it can detect dust particles in the air. So previous Ion NPIs, we showed off sensors that did barometric pressure or did volatile organic gases. But the other kind of air quality that you might be interested in measuring is particles. And this is something that comes up if you live in a city that has smog or if you have wildfires near by you and a lot of people had to deal with that over the summer, you know that you'll get an air quality index alert that tells you, hey, wear a filtering mask because there's particles in the air from the soot from the fire that could harm your lungs. So there's different classes of particles, the size of them. And this graph I grabbed from Wikipedia shows some of the different particles that you might have to deal with. But basically, you know, you're looking at micrometer sized particles, like 1, 2.5, and 10 are the most common sizes of particles that people are looking to measure. And how this works. So inside this box, there's a fan, and that's actually pretty important. You want to have something to bring air in. And it brings a little bit of air in, and then it has this laser diode. There's the lasers inside of it with the lens. And it bounces the laser off of the air. And you know how, like, when you have a sunbeam in your living room? Yeah, and I'm like, wow, it's dusty in here. And you're like, wow, it's really dusty in here. It's the same thing, right? You're flashing light directly, a very columnated beam of light. On particles, you're going to get little reflections. And the reflections can then be detected by a light sensor and then processed by the microcontroller. And then, you know, it doesn't actually count every particle. It just does a very good approximation. And it's calibrated, and then it pipes out the output. So here is, you know, you can get, of course, extremely expensive dust sensors and compare it. But this one is like, you know, like 20 bucks or so. But for the price and size, you're going to get very accurate results. You can see here the density values, which is micrograms per cubic meter. And the measurement accuracy, it's going to be within like 10%. So again, it doesn't count every particle. It gives you an approximation. But the approximation can be quite good. What I really like about this sensor is that it's got two ways to wire it. A lot of particle sensors, especially the lower cost ones, only have your output. What I really like about this sensor is it also has I squared C. You get yours if you'd like. But I squared C is really nice because for a lot of single board computers or microcontrollers, they don't necessarily have a spare UART. Or you want to use the UART for something else. In that case, I squared C could be a really good option because, you know, you can share the I squared C bus with anything else. I squared C is kind of just a universal sensor interface. And so when they said this sensor has I squared C, I said that's very, very, very handy because it means you can actually use it with stuff like, you know, Raspberry Pi or an Arduino or a particle board, not a particular sensor, but like the cellular board is called particle. So you have a particle-particle sensor. If you would like to just quickly test it, what I thought was neat is they provide a Windows program. And then you can just use an everyday USB to serial console cable because, again, the UART data coming out is just 9600-bod serial data. So I just grabbed, you know, like an FTDI cable and I connected the TX pin from the sensor to the RX pin on the adapter, ran this program, looked for the COM port, and it just started spitting out data. You know, each report has a, you can see it's here 57. This is the 57th report, and it tells you the PM 1.0, 2.5, and PM 10, you know, microgram per meter measurements. And then I took my soldering iron and I kind of like blew some smoke near the sensor and you can see the values went up very, very quickly. But once I took away the smoke, they came down, again, just as quickly. So it's a very reactive sensor. You'll get data about once a second. All right, this is available on Digikey and the part is P12025021ND and the short URL is digikey.com. Forza short, Z, D, C, V, B, J. And we have a little bit of a demo. Yeah, let's show off this demo. We're gonna get a little dangerous. Yeah, well, dangerous as far as a candle. So this is the sensor. And I've got wired up over I squared C to this feather board. And then I've got a little display. You see it's updating about once a second. But it's very clean in here. It's under one microgram per meter cube. But we're about to change that. I'm about to ruin this with a candle. And this is a scented soy candle. Lavender. Lavender. Okay, so the candle itself is going to have some effect. Here, I'll hold this up. You're gonna see the numbers go up. Okay, so it's like going to two or one. But then when you blow it out, that creates a lot of smoke. So much smoke. What do we do to ourselves? What have we done to this planet? We know, because it's like maxing out. It's like 1,900, 2,000 PM, 10 particle. So basically don't constantly blow out candles and have to smoke. Lots of dust particles in it. But it works quite well. And I like that it's very slim and elegant. It's small. It's easy to use. It's got little mounting holes. So a nice little sensor. And you can see the air clears out pretty quickly. So we're fine. We fixed the planet. We fixed the planet. Okay. And then I'm not going to show this whole video, but what I didn't want to show is just a snippet. So if you search on our site or online and just search for Adafruit Panasonic, you'll see a really great video. It's about two minutes and 30 seconds. Pre-COVID. Yeah. Two minutes and 30 seconds. And they did a really beautiful job. They came out to New York. We had visited Panasonic. So I just want to show the intro and then you can see one of the engineers talking to Lady Aida. Again, pre-COVID. That's very close. But I wanted to give them a shout out for making a very informational video. But also it told our story and it showed manufacturing in New York. So we're just going to watch this first few seconds of it now. Hi. I'm Eric Johnson from Panasonic. Hi. Where are we? We're here at the Adafruit factory in downtown Manhattan. We have a pick and place line where we actually do in-house. All right. So you can watch the full thing later, but that's the video. And that is this week's Iron and Pie. Thanks everybody. Tune in next week.