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September 22, 2011
about 10 months ago
Yeah… I ordered 5, and got 4 identical 7-segment serial LED driver boards. So… not quite there on variety.
On the other hand, the other thing on the order was 2 of the 4-digit 7-seg displays that go with them. So… maybe that was on purpose? That’s nice if that’s the case, but still… 4?
about 11 months ago
What’s the purpose of Q2 in the schematic?
Thanks for the response. Do you actually have one of these? Can you confirm it’s actually pulling near 5.4A? 65W seems awfully high for 3 feet of LEDs. With it being 12V it seems like they’d be grouping the LEDs and running them in groups in series or something.
Edit: Oh, right, like Kamiquasi said below. Sounds like 3 per series group. So cut the current/power estimate by 3. And Kamiquasi mentioned 20mA. So which is it?
Any chance of lowering the volume discount level on these? I need 20m, but if I buy 4 of these I’m going to end up paying $20 more than buying 20 of the 1m version.
More info please! What’s the schematic? Just resistors in series with the RGB inputs of the LED? What’s the max current draw?
about 2 years ago
This product made me a hero.
The left button on my wife’s laptop had given out and was failing to register a press about 25% of the time. The culprit was a button just like this except in SMT gullwing form, soldered to the motherboard. I happened to have one of these sitting around (which I didn’t even know… the wife found it while digging through my spare parts). I straightened and bent out the legs with a pair of needlenose pliers and snipped them down, and it was a perfect replacement.
Lesson learned: you can never have too many spare parts. (Alternate lesson: I could really use a hot-air rework station. My desolder-fu is weak.)
about 4 years ago
I’ve got one of these plugged into a standard Arduino Uno (DIP version), and it’s working just fine with no apparent ill effects. As near as I can tell from the board, it pulls power from the Vin pin and runs it through a regulator to get its 3.3V.
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