LED driver picture.
Added 2018-10-17 05:02:04 +0000 UTCJust a picture in this post. For John who was asking how to identify if the capacitive dropper LED string drivers have been supplied with the wrong voltage PCB.
Although all the cases are marked 220-240 the boards inside two of the 12 I have here were for 110-120v.
In the picture the top one is for 120V (two electrolytics forming a voltage doubler). The bottom one with the single electrolytic capacitor and four diodes is the 240V version.
Comments
It's designed to drive very long series strings of LEDs. Potentially over 200v from a 110v supply.
Big Clive
2018-10-19 01:13:43 +0000 UTCSo it drops the voltage/current with the series capacitor, and then doubles the voltage (and halves the current again?), and then puts it through the LEDs? What's the point of that? If it's only a 60V drop on the LEDs, 120V mains can handle that, with the same current with a 2uF capacitor. Were the 2uF capacitors just too big for the PCB?
2018-10-18 23:37:08 +0000 UTCNot even a moving GIF? <a href="https://ezgif.com/" rel="nofollow noopener" target="_blank">https://ezgif.com/</a> Just kidding. FYI we must've found SKIBIDI at the same time.
2018-10-18 10:48:01 +0000 UTCNED. I like it, I'm stealing it. ;)
Chris Talbot
2018-10-18 08:37:31 +0000 UTCGreat now I have to go back and watch capacitive dropper videos all of them, I know I've watched all your videos, but when I video benj I dont always absorb all info. I'm gonna force (ask him to repair it with me I already took apart while he was at school )my son to repair a car cell phone charger today. Ben waiting 12 years for this moment.
2018-10-17 21:17:33 +0000 UTCMight power an LED, might create a single use NED (Noise Emitting Diode). :)
2018-10-17 19:11:19 +0000 UTCI learned to always open up Chinese made mains powered stuff as a lot is unsafe.
Nuts 'n' Proud
2018-10-17 16:59:11 +0000 UTCPixies will be flying
AESFTW
2018-10-17 13:02:38 +0000 UTCBest way to identify the intended voltage is to shove mains across the input, there will be audiovisual clues if the voltage is not proper.
2018-10-17 08:48:25 +0000 UTCOne Smoother than the other? Half wave vs Full wave?
2018-10-17 08:07:55 +0000 UTCYeah, I had a feeling it might look like a video
Big Clive
2018-10-17 07:06:32 +0000 UTCIt's very much a repurposing of an existing PCB
Big Clive
2018-10-17 07:05:41 +0000 UTCI admit it! I clicked and stared at that picture WAY to long waiting for it play(the iOS Patreon app takes a long time to start playing videos, okay!). I should have read the description first. Question: what would output on a scope look like? Would they both be half wave rectified?
Lostngone
2018-10-17 05:14:28 +0000 UTC
