Easy DIY wireless strobing LEDs
Added 2022-01-17 04:32:16 +0000 UTCThis video will sound quieter than usual, as my audio app refuses to process it for some unknown reason.
https://www.youtube.com/watch?v=g6rI5PJLtx8
It's a very simple and novel project.
Comments
Interesting - I now want one 😁 - trouble is that my phone is not wireless charge capable therefore I don't have a wireless charger. So, I've splashed out the princely sum of £3.13 all in on Ali Express for one - might get it in a couple of months 📅. Thinking of experimenting with different coil sizes/shapes wound round 3D printed formers.
Paul Kemp
2022-01-18 14:20:49 +0000 UTCIt affects the intensity. The grey wire coil was just 10 turns and is noticeably dimmer than the 20 turn version.
Big Clive
2022-01-18 03:15:12 +0000 UTCGiven that you can get a noticeable amount of light out of modern LEDs with just microamps of current, I'm wondering if one of your coils - or maybe one with a few hundred turns of the magnet wire - would light if you stood under a high voltage transmission line. I know magnetic field strength falls off at something like inverse-cube rates, so it would be a bajillionth of what it would be a foot from the wire, but...
Charles
2022-01-18 01:41:38 +0000 UTCThat's really neat! I'm curious if the number of turns is important. 10, 20, 45, whatever, how does that affect the circuit? That might make a nice follow-up video.
Michael Dunn
2022-01-18 01:05:09 +0000 UTCWhere does one go about finding geared turntables for free?
Circuitmike
2022-01-17 22:54:17 +0000 UTCNot silly at all ....good cheap fun, which is what this is all about. 👍🏻
Phil in the kitchen
2022-01-17 21:27:10 +0000 UTCI like the new stile, I think that it may help encourage people to technical channels by cutting out the scary big words & complex stuff showing how to make something cool (that actually works & is not fake) in a short digestible way. I am not by any means saying you should stop making the in depth content, however this could act as a sort of side line to bring in new people to the technical side of the internet, a bridge if you will between in-depth science & jargon land & the funny cat videos
Craig Matthews
2022-01-17 21:18:54 +0000 UTCThe phone has surprisingly coarse and heavy winding.
Big Clive
2022-01-17 19:30:32 +0000 UTCI've not been able to stop sleeping for about a week. I'm just starting to get back to normal.
Big Clive
2022-01-17 19:29:44 +0000 UTCVery strange and intermittent effects on my toothbrush charger. Like it needed a proper load to keep running.
Big Clive
2022-01-17 19:28:58 +0000 UTCI almost put one into the bottom of one of those plastic tumblers you sent me. I may still do that.
Big Clive
2022-01-17 19:25:12 +0000 UTCNot sure what would happen with the tag detectors.
Big Clive
2022-01-17 19:23:16 +0000 UTCIf you look at the recent "short" version of this video it shows a bridge rectifier and capacitor in the background. It charged the cap to 5V with a small meter across it, but the pulses from the coil are so brief that a string of LEDs with a suitable resistor are very dim to get beyond strong pulsing.
Big Clive
2022-01-17 19:22:35 +0000 UTCI have one of the "led fingernail inserts" shown in a previous video and that works with NFC readers so I will have to give this a go and see what happens. As to getting more power, are the circuits in the piezo-electric switches used to store power likely to be of any use?
nowt
2022-01-17 16:51:01 +0000 UTCI wonder what you could power beyond a couple of LEDs from this? Could a capacitor to smooth things out let a little low power microcontroller run? I also wonder if it would work on RFID barriers like you get in some libraries/shops?
Jon Knight
2022-01-17 16:24:21 +0000 UTChttps://www.adafruit.com/product/5140
Jeremy Impson
2022-01-17 14:58:28 +0000 UTCI just bought a premade batch of LEDs and the transmitter from adafruit, and was also wondering what to do with them.
Jeremy Impson
2022-01-17 14:56:26 +0000 UTCMy initial thought is to glue it all into the base of a clear glass, like the UV radium gin glass, then use the charging pad as a coaster. Would be good for parties and would encourage people to actually use the bloody coasters.
evilution
2022-01-17 11:27:15 +0000 UTCThat's cool, I wonder if something more complicated could be done, perhaps, a ring of led that turn on once per pulse counting up to a number then turn off one at a time before the beat for the first led hit. Not sure if it could be done low power enough to make it work from just the pulses... Perhaps with a small super capacitor like 6v 1F.... Probably smaller would work but the trick is to meter the pulses and have that initiate the leds. The whole thing would need to be efficient enough to ultimately leave more power on the cap than what it had at start... Hrm... Doubt a low power latching gate setup would exist.... Even then it would need to be a low pee power smd package to patch on top the last pulse... Probably easier with something like a pic.... Guss I will think on it
Michael Wellman
2022-01-17 09:38:06 +0000 UTCIt might be worth doing more experimentation with the number of turns, as just like a transformer, which it is, you could optimise for best current at enough voltage to drive the LEDs. I wonder how many turns are in the receiver in the phone to charge a li-ion, I suppose you'd want something about the same!
William Taylor
2022-01-17 08:57:25 +0000 UTCNow I have to make one and try it on my Braun wireless toothbrush charger.
Tony Weavers
2022-01-17 07:22:44 +0000 UTCShaded Pole motors that cool the magnetron on microwaves are an amazing source of enameled copper wire. And the geared turntable Motors have ultra fine enameled copper wire all great sources for free
Jonathan Hughes
2022-01-17 05:08:21 +0000 UTCClive, you need sleep
Basti Elektronik
2022-01-17 04:48:48 +0000 UTC
