Self Powered Circuit Generator - Page 1
Forum section: electronics / projects

author: artanis
author_rank: Newbie
timestamp: July 30, 2024, 06:42:01 am
content: 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.htmlBigclive 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.

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 30, 2024, 04:23:37 pm
content: 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

author: Benta
author_rank: Super Contributor
timestamp: July 30, 2024, 06:51:54 pm
content: The general term for this kind of thing is "energy harvesting".It can be a lot of things, kinetic, thermal, electric, optical....

author: Phil1977
author_rank: Frequent Contributor
timestamp: July 30, 2024, 07:44:45 pm
content: 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, ...

author: artanis
author_rank: Newbie
timestamp: July 30, 2024, 09:03:42 pm
content: Quotethat's a good clue, I totally missed itQuoteIndeed 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.

author: BrianHG
author_rank: Super Contributor
timestamp: July 30, 2024, 10:56:59 pm
content: 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.

author: Phil1977
author_rank: Frequent Contributor
timestamp: July 31, 2024, 08:42:52 am
content: 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.

author: artanis
author_rank: Newbie
timestamp: July 31, 2024, 10:38:01 am
content: QuoteThanks for the ideas! will experiment and see where I go with this.

author: artanis
author_rank: Newbie
timestamp: July 31, 2024, 10:41:24 am
content: FOUND SOMETHING!https://www.aliexpress.com/item/1005005936566868.htmlEDIT: Got a bit too excited, unfortunately it's no longer available

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 31, 2024, 02:29:52 pm
content: I managed to find a manufacturer's site which has more part numbers for you to search for.The name almost looks like Limptech.

author: artanis
author_rank: Newbie
timestamp: July 31, 2024, 03:35:04 pm
content: Quotenice one! getting closer and closer

author: JimRemington
author_rank: Regular Contributor
timestamp: August 02, 2024, 02:02:10 am
content: Here is another self-powered switch manufacturer:https://www.enocean.com/en/product-category/kinetic-switches/