 This week's IonMPI brought to you by Gigi Key and Adafruit is an IonMPI new product introduction from Panasonic. Hi Panasonic welcome back Panasonic has been on we visited them we visited them they've also visited us but they've also been on IonMPI. This week IonMPI is from Panasonic it's their PIR sensor series the Papiers in particular the EKMC series which is actually like 15 20 different sensors in different power color and shapes. So let's kick it off so the release for the new Papiers PIRs I don't know is the square style ultra low power PIR sensors they use as little as one microamps which is like nothing it's a close to nothing and that makes them really good for detection with batteries and also if you want to do ultra low power detection for reducing your power consumption of some other system because the PIR sensor can of course detect when people around and turn off your heat or turn off your lights when nobody's around reducing energy consumption so it's PIR sensors are you know all these book goodies they are you know we keep designing newer and better ones. So this is what it looks like inside the plastic case so there's a PIR element for for sensing passive infrared and inside is the sensor element the power circuitry any passives as well as an ASIC that does the PIR analysis. So how do PIRs work well I'll maybe already know but I really want to use this graphic that paint your dragon drew for me a couple years ago because it's got a dragon in it thank you Welsh Dragon. So you see in the top right the PIR sensor with the Fresnel lens and the Fresnel lens is actually we actually don't show the lens so much actually takes the two sensing elements and kind of splits them up so they're spread out over a 3D space. You can see at the bottom as the dragon moves between the pink and green element the two elements there is a differential in the heat the infrared measured by the two sensitive sensor areas and you get this analog waveform which then can be processed by your ASIC and turned into a digital signal and the digital signal can be held for like 10 seconds. There can be a sensitivity rating so a little bit more processing to clean it up and also of course avoid false triggers or or not triggering. So this is the lens pattern that you get on the PPRs from Panasonic works about 5 meters away and you can see I think it's a 38 degree spread and it's a nice little checker box so you know as long as someone was within that cone of detection you know your sensor will go off. So PIR sensors are again like they're not new you know we stock a PIR sensor you can also get it from DigiKey and this is kind of what most people think of when they think of PIR sensor it's kind of big blocky circuit boards on the back is all the circuitry users of BIS 0001 I think is this chip and then all the passives they're kind of big and they're hard to integrate into your design what is kind of cute about these Panasonic ones is they're so small everything is contained within the can so there's EMI resistance and of course it's much smaller and since there's only three pins you give it power ground and the signal pops out that's it so there's like no tuning it's you know smart again it's much lower power because you need to have this extra regulator this extra chip and they come with a couple different lens options so again this one is a square lens but you know here's the CAD PDF file but there's also different lenses if you want the new one is the square but I do want to give the whole family some love. Use is really easy as you see you just give it some power and then you know the output is very weak but that's okay usually you use it to drive either an enable signal so you know a 1 to 10 microamps of quiescent current draw you could have this on all the time and then when somebody is detected it immediately turns on the enable switch for your electronics and powers up the rest of the circuitry like or an interrupt pin to take something out of an ultra deep sleep. At the bottom there's a little bit of a diagram just showing it's really good for X and Y movement but not Z movement so somebody's moving in and they happen to be like right in the center of the Fresnel lens you won't see differentials I mean it's kind of rare for that to happen but just letting you know people know it's really good for motion across it's not sometimes that's why you have to like wave your hand a little bit to get a PIR sensor to go off and the thing that's really nifty about these is just their ultra low power consumption so you can give them like two to four volts which means they're great for battery power and there's a couple different members of the family there's I think a 1, a 6, a 20 and I think 170 microampere quiescent current draw. Why? Because each one's gonna have slightly different sensitivity and range the more you're spending in current the more processing that you can spend on like filtration and the faster it'll turn on and the less spurious time you have at the beginning after it powers up. Okay available on Jujiki and they're in stock in multiple different colors so there's like pearl there's which is like a creamy color there's white and there is black and then again there's 1, 6, 12 and 170 microamps but this is like the smallest and easiest PIR sensor to use and it works from five meters away so it's still good for like detecting somebody in a room so you know people are thinking a lot about how to reduce power consumption how to make your electronics more green adding a PIR sensor you have something this low power means your battery consumption is gonna go down and you know your electronics will last longer it's not enabled until somebody's in the room to your point yeah yeah we'll have another segment and probably a whole show devoted to a lot of sustainability things yeah I thought about that okay there's a video you told me what clip to pull out so I did it it's it's a minute and a half but it's I think it's a really good explanation of PIR sensors and what you use them for. Let's watch it and then we'll play IonMPI on the way out and thank you Jujiki and Panasonic for this week's IonMPI here we go. Human body detection sensors are roughly divided into three types image sensors active sensors and passive sensors. Pyroelectric infrared sensors or PIRs are human detection sensors that are categorized as passive devices that allow pyroelectric infrared elements to sense motion. Pyroelectric infrared sensors operate on the principle that when a person passes through the detection zone the temperature of the pyroelectric element changes. When a person enters a detection zone the initially stable charge of the detection element starts to fluctuate causing an analog wave form to be generated. When this analog wave form exceeds the optimized threshold preconfigured in the ASIC a digital detection output signal is produced. This digital output can be used to determine that a person has entered the detection zone. Panasonic's pyroelectric infrared sensors feature ease of use and high reliability which makes them the preferred solution for lighting, home appliance and especially internet of things applications. An extensive lineup of lens designs and colors are available depending on the application and installation location. Panasonic pyroelectric infrared sensors are composed of a sensor module that incorporates a proprietary ASIC and a compact lens with an optimized design. By enclosing all the parts necessary for human body detection inside a metal package Panasonic contributes to lower developmental costs. At the same time the metal package is used to realize excellent noise immunity while shielding off the electromagnetic waves generated by devices such as... And by request we're going to show the size of it. Yeah so you always pick one up so you can actually see if it's a little shiny. Here's my human hand. There's your human hand. So this is yeah. It's quite small. Here yeah. So you can see there's a lady to hand there's my hand. Yes you can sort of see the lens there and you can sort of see there's a little bit of a pattern on it. And then here's the bottom which has a... You think you could probably bend this to be breadboard friendly but it's meant to be soldered in and you can tell there's a ground power and output pin. Okay. Nice and square. That's this week's Iron MPI. Iron MPI.