Self Powered Circuit Generator

[artanis]

Hello, I am interested in making a self powered switch that can send a small signal to a receiver, something similar to this one:
https://www.dfrobot.com/product-2568.html

Bigclive has a taredown video of a similar mechanism here:


Does anybody know if I can get the components for that generator ready made or are they a custom component? I have no clue what to ask google in order to get to at least something similar that I can order.
Any clues are highly appreciated.

[Kim Christensen]

What he shows at the 7:00 mark definitely looks like a custom part. That would be hard to find. Searching for "kinetic switch" just gets me the finished products.

EDIT: Part number on coil looks like DPM4175 or maybe DPM4173

[Benta]

The general term for this kind of thing is "energy harvesting".
It can be a lot of things, kinetic, thermal, electric, optical....

[Phil1977]

Do you want to wirelessly send a RF-signal?

Then you probably should rely on off-the-shelf products like in Bigclives video.
 
Or do you just want the power generator? Then you could "misuse" a lot of components, like mentioned by Benta or a stepper motor, a loudspeaker coil, a peltier element, a piezo crystal, ...

[artanis]

EDIT: Part number on coil looks like DPM4175 or maybe DPM4173

that's a good clue, I totally missed it 

Or do you just want the power generator? Then you could "misuse" a lot of components, like mentioned by Benta or a stepper motor, a loudspeaker coil, a peltier element, a piezo crystal, ...

Indeed my circuit will also send some rf signal and I am interested to see if I can build one myself as a hobby project.
Currently I am interested only in the power generator and I would much prefer to find a solution that I could purchase somewhere. Thanks for the idea on how I could cook up my own from component "misuse"! this will come in handy if need to make one myself. 

[BrianHG]

Try to disassemble a few small DC relays for a compact pre-fab coil with metal core and adapt your own moving magnet to generate voltage.  Expect to use a higher voltage relay like 24v or 48v to make only 3v for a short instant with a load on the coil.

[Phil1977]

Or just use one of the small but powerful loudspeakers e.g. from a dead bluetooth-boombox.

Remove the membrane as far as possible without destroying any copper wire. Then put a heavy coin in the middle and just vibrate everything.

The voltage you get from these speakers is quite low, but it´s possible to rectify it with a shottky diode and run e.g. a joule thief oscillator with a small LED. It´s quite fascinating where you can "harvest" power that way.

[artanis]

Try to disassemble a few small DC relays for a compact pre-fab coil with metal core and adapt your own moving magnet to generate voltage.  Expect to use a higher voltage relay like 24v or 48v to make only 3v for a short instant with a load on the coil.

Thanks for the ideas! will experiment and see where I go with this.

[artanis]

FOUND SOMETHING! 

https://www.aliexpress.com/item/1005005936566868.html

EDIT: Got a bit too excited, unfortunately it's no longer available 

[Kim Christensen]

I managed to find a manufacturer's site which has more part numbers for you to search for.
The name almost looks like Limptech.   

[artanis]

I managed to find a manufacturer's site which has more part numbers for you to search for.
The name almost looks like Limptech.   

nice one! getting closer and closer 

[JimRemington]

Here is another self-powered switch manufacturer:
https://www.enocean.com/en/product-category/kinetic-switches/