 Okay, sometimes I have a lot of faith in humanity and then sometimes I get products that have center negative. So you see here I actually even like use some Sharpie marker to really highlight this. The outer connector is positive and the center is negative which is like opposite to 99.9% of DC connectors. So like if you look at, this is like a 12 volt power supply and I've got my multimeter here. If I check this like I said 99% of products is center positive 12 volts ish but then what's this? This is a magical cable. It does exactly what you think. It's a flippy floppy reversey poppy. So now when you check the polarity it's center negative. Okay, very handled little cable. So I just finished testing it so I'm going to try again to the shop. This is a USB Trinkie which has a temperature humidity sensor and this is a QDPI board with a USB host BFF attached. And then if I plug this in and on the computer you'll see that I'm getting the USB serial data from USB host through to the QDPI SAMD 21. So if you look over here the way this is working is QDPI board which is a USB device is plugged into this on the go cable into this micro B port on the BFF board. And then this is a USB host chip that does serial, sorry, SPI to USB host is called the Max 3421E and what this does is allow something that only has one USB port to basically have a second USB port. This is a great demo because it just reads the serial data from here and then pipes it back out over USB but it tests the enumeration, tests that have found the USB-C device and you can see the LED telling me when data is being transmitted. So this is kind of fun, it could be a really good little board, you can sort it directly off the back to save some space and this will give you basically two USB ports, you can do USB host to device translation or conversion, that could be good for accessibility projects or you know keyboard mods etc. This is almost working, one little fix I have to do for the power supply and then I can get this into the shop. All right, let's do this. Okay, so during the part shortage, you know, microchips sort of require that we book a year or two worth of inventory and so I ended up buying a lot of SAMD21s because we use a lot of SAMD21s but then they shipped me like two years worth all at once so now I've got like 50,000 SAMD21s so you're going to see a lot of SAMD21 products coming out. Like this Trinkie, this is the board, the SAMD21E plugs into USB and it can run circuit python or do we know or even micro python and on the end here you see this nice cutout with an SHT45, that's a precision temperature and humidity sensor, oh wait, hold on, there you go, temperature and humidity and there's also capacitive tachyloneopixel on the reset button and this is the tester so this is a Pico board that is able to program a SAMD21, it does it in about like five seconds, ding dong and test complete, alright and this is where I need to go into the shop so it sends humidity, temperature and the serial number of the sensor out over CSD so it's going to be perfect for people who just want to like get that data in to do data analysis or environmental sensing stuff so that's a little, that's a little dev board. Okay, I'm testing out this new board I designed, this is a 38 kilohertz IR receiving decoder board so what this has is two IR decoder chips like one wide angle and one like straight up and down, it's basically the SIM is these kind of like breadboard IR decoders, they look for 38 kilohertz IR remote signal and they decode it and what's important is that they're actually kind of designed with the gain and the decoding logic to handle remote control specifically so you can see when I press this remote button it's telling me okay I got some signal and then if you look at the Arduino output I'm seeing NEC data being decoded so this is good, this is working and it should be a lot easier to mount and of course having two selectable decoders means you don't have to worry about bending this sort of sensor up and down and I like that it tells you when it's getting signal as well from the IR LED so this is ready to go in. Alright Lady, what was this? Okay I just showed off my 38 kilohertz IR decoder and this takes remote control messages that are encoded in 38 kilohertz infrared and decodes them and this is a different break up board, this is the TSSP 7738D modulator so it's the difference between a decoder and the modulator. Well if you look at the oscilloscope over there you'll see the difference so on the bottom you see a 38 kilohertz on-off pulse basically I'm sending 38 kilohertz IR and then I stop for 10 milliseconds on and off and the demodulator can very easily detect when there is 38 kilohertz IR or not but if I change this for a decoder which is looking for infrared signals it has like internal logic that's looking for valid infrared so what happens is when I plug this in you'll see it does detect it but then it eventually disappears oh quickly plug it in and plug it oh can you look at this go yeah so you'll see it's like oh yeah I found the signal but then it the internal logic is like oh wait that's not a valid infrared signal and it turns off so this is good for infrared remote signals but it's not good for just detecting 38 kilohertz IR in general for that you need a demodulator it could be used for non-infrared remote projects that still want to do infrared signaling. Okay cool, what are these? Okay so this is the board I just showed off in that video so it's this is the IR demodulator doesn't have any smarts to it all it does is look for 38 kilohertz infrared and then gives you the envelope output so good for like some people use this for like proximity or distance sensing or like other kind of weird sensing that's not they uses a modulated IR but doesn't use infrared remote controls and this is you know we showed off this chip on the great searchers looking for precision humidity and temperature sensors and this is like incredibly high precision temperature humidity sensor that from TI the HTC 30 21 and 20 I saw me a little break up board for it this is that PWM I think I talked about this couple weeks ago I designed a little PWM output board because somebody was like oh I just need to generate like a 250 Hertz or 25 kilohertz signal I actually have the prototype for these and I messed it up but gotta be designed for this board and then made a little mistake on this I'm also sending out new pointers for it but this is a USB host BFS so you saw it on the back of your Qt Pi board and using the max 3421e it gives you an extra USB host port just up secret it is very top very secret