Hello,
currently I’m waiting for the components to be delivered. However, I would like to have tp4056 charge controller fixed into my 3d printed housing. But since I need to see the charging/fully charged led, there is no such way and I would need a removable cover to be able to connect to USB and watch those LEDs. In my mind a good solution would be a little opening right where the USB port is, along with two 5mm LEDs embedded in the housing. Could I put two 5mm LEDs parallel to the red and the green LEDs? As far as i understand, there is 5V on that pcb-LEDs, but i dont know if that current for a standard 5mm LED would be to high, since i would then use something like 330Ohm instead of 1k? Otherwise i would need to use a transistor and use the 5V and GND pins for supply, and the pcb leds contacts for powering the transistor.
Wouldn't it be easier to either drill a 1mm holes on your casing where the onboard leds are,
or substitute the onboard leds with corresponding 5mm leds...
Since i havent the board allready, i dont know about the brightness of the buildin leds, i guess they are somewhat small? Replacing them with 5mm Leds could work, still not sure about using 330Ohm instead of 1k, with 1k the LEDs are too dimm...
They will be about as dim as the original. I don't know max current of TP4056 pins, so 3x current might or might not be ok.
No. If the Vf is lower than the onboard LED they may never turn on.
i would then use something like 330Ohm instead of 1k?
The datasheet specifies Vol for those pins at 5mA, so 330 would probably be to small and may damage the IC.
Ah, thanks, didnt found/know those specs. Guess im gonna try out plain module first, and probably LED+transistor instead, just to be on the safe side...
The other option is to use light pipes.
Oh nice, didnt thought about something like this. Thanks for the input!
You have to find one that is the right size and the mechanical arrangement may be difficult but I have used then in the past for a very simple setup
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