Very good video. Super interesting. I have been working with these devices here in Argentina for a year. I am currently analyzing the intermediate frequency with artificial intelligence and fast fourier transform. The idea is to reduce false positives and use this module in alarms. I also did tests with the RCWL-0516, which is much inferior, and I noticed that there is a lot of influence between these modules. In fact, the emission is so low that it can be increased by adding more modules (just feeding them, without taking the data from the added modules). I don't know how this practice will influence the HB-100, but I'm going to try it. Thank you so much. Greetings from Buenos Aires.
Thanks for the praise! Doing a FFT on the output signal is definitely the way to go if you want to get the most out of these modules. Please let me know how using additional modules as transmitters works out for you. I think the challenge will be to make sense of the signal output of the single mixer, since the oscillators are not in sync (maybe close enough in frequency, but definitely out of phase). And greetings from Germany!
@@robertssmorgasbord What you say about ECWL-0516 is very interesting. From what I can understand, the device is basically a super-regenerative receiver. This puts the system at times in transmission and at times in reception. This change is given randomly over time. This randomness manifests itself as white noise, which is emitted in the form of RF with the frequency of the tank circuit between the printed circuit and the distributed capacities. The work changes are altered by a secondary antenna that increases the emitted power. It also affects the time it remains in the reception state. I also tried modulating the RF output with audio and it seems to work. More tests would have to be done. It's very interesting.
@@dbagnis Playing with microwave circuitry is fun for sure. I have to admit when it comes to the details, or more specifically, to make microwave circuitry exactly what you want it to do, I'm struggling. It's like black magic to me.
I guess you could do that by loosely coupling the output (e.g. by a receiver antenna, if you solder something onto the output antenna patch you for sure shift the frequency) into an amplifier. But that's only viable if you're OK with aboutish 10 GHz.
No worries! Actually I don't like it that much. It's a wee bit flimsy. I bought it at a electronics store called Conrad. It's this model from Toolcraft (their house brand I guess): www.conrad.de/de/p/toolcraft-zd-10h-dritte-hand-l-x-b-x-h-150-x-74-x-120-mm-2269174.html . They do sell their stuff in several European countries: www.conrad.com/ .
To be honest, I was not sure if my setup would work at all. And I was pleasantly surprised that it did work so well. And yes, RF, especially that microwave, stuff is black magic.
Nope, it's a doppler radar, so it just measures speed and doesn't care about the distance (as long as the distance doesn't get to large). To get a distance you need to measure the time it takes for a radar pulse (!) to be reflected back. Though this module could be pulsed, it wouldn't output any signal, unless the object is moving.
Yes, why not. The mixer inside that thing consists of a single microwave frequency transistor with no input/output filtering whatsoever. So getting an IF of 7MHz out of that thing is really not a problem.
