 Hi, on MPI. DigiKey and Adafruit bring you Ion MPI every single week. This week is from since Sierra Leone, Lady Ado. What is the- Did you know that they're the sensor company? Well, I do now. Yeah. What is the Ion MPI this week? MPI stands for New Product Introduction. That's right. So what is it this week? This is a very new product. It's so new DigiKey hasn't been featured it on their slash movie. It's so new it's not out of stock yet. It's a global shortage. It's a little out of stock. It's not completely out of stock. Did you buy some before we did this? Maybe. OK, so this week's Ion MPI is the SCD-40 and SCD-41. These are adorable little sensors from since Sierra Leone. And these are true CO2 sensors. Since Sierra Leone makes some ECO2 sensors that are like effective CO2, which they do by measuring volatile organic compounds. And they kind of like guess what the CO2 level is. This is a true CO2 sensor. It's actually measuring part per million of carbon dioxide in the air. You may be familiar because people a lot of times talk about carbon dioxide on the planet. It's considered a greenhouse gas. And usually people only measure carbon dioxide for maybe like, oh, you're a ventilation engineer or you're doing outdoor environmental science. But they have really good timing because right now people really want CO2 sensors. We use them. Why? Because in the last year, so a lot of epidemiologists and scientists, and in this case a mechanical engineering professor, said, hey, for diseases that are passed by airborne transmission, you can use CO2 as a way of determining how much air circulation you have. Because as you probably learned in grade school, humans like to take an oxygen out of the air and they expel carbon dioxide. So over time, if you have a closed house or room and you have a lot of humans in it, like a workplace or a school, you're going to see the CO2 rise, rise, rise, rise, rise. Now, it's best to have low CO2, but humans, as long as it's less than 1,000, your body's totally fine with it. We can handle that. But instead of just using it as a gauge of health, like CO2 level for breathability, outside is 400 ppm. And so as long as you keep the indoor at 600 or less, and here's a paper that was written that is referred to by the article I just posted to, this is for different diseases, this is for tuberculosis. But they noted that they could stop the transmission as long as the CO2 was less than 600. Not because the CO2 had anything to do with TB, but because if you had low CO2, that means that there was enough air movement that air wasn't sitting around, and people were bumping into these particles because the air was being evacuated and they were going to be replaced with fresh air. So since Syrian, this is not their first rodeo when it comes to CO2. They've had to seal the SCD-30 for quite a while, which you might, this looks very familiar, that's because we have a breakout for it. So this is a true CO2 sensor that uses NDIR, to determine the CO2 part per million. It's a great sensor, one of our most popular guides that I think was just featured on Make Even is Carter's matrix portal CO2 room detector, which is very simple and just says a four little word, like good, bad, worn. The number, which is the CO2 level in this case, is 780 to part per million, and then like a happy face or a frowny face. So a very simple sensor. But one thing that's not so awesome about the sensor is it's kind of big, and it's through-hole soldering, so it's not easy to embed in small electronics, and it's not easy to automate production of it. So what's really cool is here's this diagram showing the size difference of the SCD-40 versus the earlier SCD-30, and you can see, they said it's seven times smaller, and all the way compact in every size, and it's surface mount pick and placeable, which is wonderful. So there's two versions of it. Oh, it's an I-square seat sensor, so it's very easy to use, and there's two versions. There's the SCD-40, which goes from 400 to 2,000 PPM, and then there's the SCD-41, and it's a higher accuracy 400 to 5,000 PPM. Now, use whichever works best, but for indoor CO2 measurement just for humans, you don't really need to know if it's over 2,000, because if it's over 2,000, that's too high, and you should tell them lower until it's less. You don't really care if it's 3,000 or 4,000, like it's all bad after 2,000. So 400 to 2,000 is plenty, but for some scientific purposes, a single shot mode is probably good for low power usage. The SCD-41 is gonna be a little more expensive, but has a higher range, so pick and choose, but they're the same package, so you can hot swap whichever one you like. It's also available in R1 and R2, so it's four total part numbers. R1 is 60 sensors per reel, and R2 is smaller reel, and R2 is a larger reel, probably like just the real size is different diameter. They also have a sensor bridge and a sensor breakout available, which we'll chat about in a minute. And here's just something I thought was just so cool. So Sincereon already wrote libraries for all these different platforms. And this is really wonderful because one of the things that makes me so bummed out is when a company is like, yeah, we wrote a driver, but it's only for our specific micro-troller, only for the compiler, like it's for a closed source compiler, closed source tool chain, an ID that's just Windows only, and it's very, very tied to the chip that we sell. It's like, we only have code for the MSP430, and you can't use it with anything else. What's really nice about Sincereon is they wrote code for Raspberry Pi, iSquared C, Embedded C, and Arduino, as well as make code. So it's like, you could even have students build projects with this and use it with make code with drag and drop programming, which I think is super awesome. So I will say at the time of this writing, there's no actual sensors in stock as they are sold out. It wasn't just me, by the way, other people bought them too. However, I didn't notice the lead time for getting more in about a month, so you could definitely get them on back order. But what I did see was in stock was this dev kit. So it's a little breakout board with a JSTPH. It's probably grove compatible and then also breakouts. And so, this is actually pretty good because it's not much more expensive than just the sensor and you can plug and play it with a Raspberry Pi or Arduino because it comes with headers and everything. They even have a video showing it, and then of course just run that code. It's just iSquared C, so you connect up power, ground, clock, and data. One of the things that they mentioned, they wanted me to make sure people knew is that the power supply, you want to make sure it's a nice quiet power supply. So if you're running this off of a Raspberry Pi, use like the three volt supply with the five volt supply because it's a little bit less noisy because the noise does affect the reading. It's available on Digikey. That's right, it's in stock. So search for SCD41 sensor, and this is in stock right now, so you can go and pick it up and it will ship to there tomorrow. Yeah, here's a short URL. Short URL. So here, and then there's the... Yeah, it's backwards. There's the... There's what you look for. But you can just type in SCD41, and then if you want just the sensors itself, search for SCD40 or SCD41, and you can sign up or back order. And we have a video. A video, and then when you come back, I'm gonna show on the overhead the demo. Monitoring CO2 can increase your cognitive performance, reduce the risk for viral infection, and make our building more energy efficient. This is why Senseiron developed a miniaturized CO2 sensor with the mission to break the size barrier for CO2 sensors. Hi, my name is Marco, and I am very excited to present the SCD4X evaluation kit and how it can be used to easily evaluate our revolutionary CO2 sensor. Compared to its predecessor, the SCD4X is seven times smaller. It is SMD, thus allowing for cost-effective assembly. It allows for adjustable power consumption and offers many more great features. Now, this technological breakthrough is enabled through Senseiron's patentant PA-Sense technology that is based on the... Okay, so you wanna show this off? I do. So this is the earlier SCD30, and this is it, you know, mounted onto this PyPortal project, which is super cool. And then this is... I'll get you a big upside down. Thank you for being patient, my new demo setup. So this is a Feather M4, and I just really loaded up... Oh, it says SCD30, it should say 40. Sorry about that. You can tell I took my old demo and updated it for the SCD40. And this is a little breakout that I made, but the one that they sell is almost the same, and you can see how small that sensor is. This is a Teflon cover just to protect it, and you can decan it if you want inside, as I can chip in the sensing element. So you can see inside right now, it's about 600 ppm, that's normal, for indoors, and then if I breathe on it, measurements get taken about every five seconds, so you'll see the CO2 slowly rise up as the CO2 gets absorbed in, so there you go. So that's normal, so as you breathe on it, you know, you have a lot of CO2 in your lungs, and then over the next minute or two, this will slowly drift down. Another thing is, by the way, it has a built-in humidity and temperature sensor as well, used to compensate the sensor, but it means that you can, you know, this very small little box can be used for all sorts of environmental sensing projects, because it does kind of everything for you. So that's the SCD40. All right, and that's this week's IonMPI. IonMPI.