Prototype USB to LED string PCB
Added 2021-10-29 02:22:22 +0000 UTCJust the same circuit as the hard wired version, but with the convenience of everything just plugging together without chopping up USB leads.
https://www.youtube.com/watch?v=-7pbjI2wQXY
This was a prototype, and in hindsight I might just put two large solder pads on it for direct connection of the LED string, or maybe even a mini screw terminal connector. Then the whole PCB could have a short bit of heat shrink sleeve put over it.
Comments
Why limit your options? Can put both screw terminals and JST connectors (or three options with solder pads).
2021-11-09 01:22:05 +0000 UTCCould do with some. Will you be selling packs as kits or populated, in your shop?
Andrew Donaldson
2021-11-04 15:44:38 +0000 UTCany chance of you putting up the gerbers for the usb-led one?
Scott Traynor
2021-10-31 16:31:25 +0000 UTCMaybe a spot for a resistor to keep the power bank awake on next design? new cheap power banks dont stay awake anymore.
Coil B
2021-10-30 20:16:59 +0000 UTCDave does tend to have high expectations of meters. To me, a general purpose meter is fine.
Big Clive
2021-10-30 03:23:59 +0000 UTCWhen my last multimeter acted up, I bought the Uni-T UT61E to get mA resolution on the 10A range as this range uses a shunt, so less likely to skew the reading than the lower ranges. I just wish I didn't watch EEVBlog's review of it as I looked at countless alternative meters, until I found another review LearnElectronics, totally opposite to Dave who made it look like an awful meter.
Seán Byrne
2021-10-29 22:10:27 +0000 UTCWell, I WAS going to suggest this, but I just assumed you had your reasons for chopping up the USB cables. Great idea, though, to add the resistors right on the USB board. I admit that wasn't part of my plan. It is now. Ta
Chuck Kirchner
2021-10-29 21:40:29 +0000 UTCI did make a hand-etched prototype of that a while ago. It requires a thicker PCB material than normal.
Big Clive
2021-10-29 18:43:20 +0000 UTCIt's easy to overheat connectors and have the pins slide out.
Big Clive
2021-10-29 18:42:35 +0000 UTCThe 2 pin USB connector just melted and the prongs came out ,this was a few days ago just a coincidence. I was not using a PCB, might try a bit of veroboard next time. I think I should have used a heat sink for soldering USB or spot welded the wires / wire wrap ?? https://www.aliexpress.com/item/32845760921.html John
John Harrison
2021-10-29 14:25:10 +0000 UTCyou should design one that has the pcb go direct into the usb port.
Kate Cole
2021-10-29 10:05:12 +0000 UTCYou Sir are no schmoe 🙂
Dr Andy Hill
2021-10-29 07:12:23 +0000 UTCCute board! I'm finding myself making more and more little utility PCBs. The barriers are so low that even a schmoe like me can save a lot of hassle laying out a board. I mostly wanted to write because I recently modified a little LED desk lamp with a capacitive touch switch to be always on; I didn't want the touch switch because it's plugged into a smart outlet, and having it default off makes it rather useless. Having watched you tear down so many LED-related things made me reasonably sure I could take the little touch sensor board out of the picture, and it works great! Thank you.
John Riney
2021-10-29 04:28:51 +0000 UTC
