GPIO power state led
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Can't find the GPIO board, but how can I get a power LED to work?
Before I used the serial TX pin in my RPi B
However it doesn't seem to work on my RPi 3 as the LED stays lit... Am I missing something?
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This works on my Pi3: I wired wire an external LED with a resistor (mine is part of a power button and has the appropriate resistor built-in) to pin 8 (UART TXD). Is that what you already did? It works for me. When I do a soft shutdown, the LED goes out.
Also, when I short GPIO3 (pin5) to ground, the Pi powers up, and the LED comes on again and stays on while running.
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I will double check my pin placement (going from a PiB to Pi3, so I may have messed up the pins...
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found the problem... I had in my notes GPIO 8 = TX for LED (from when I built my Rpi B...
So instead of Pin 8, I had it in GPIO 8 (Pin 24)
I feel sheepish :p
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this is the chart I use
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Hi!
Could you please decribe how to wire the led to function as described?
One led's pin to GPIO pin 8 (GPIO14) and the other led's pin to?
5V? 3.3V? Ground?
Thanks in advance!
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@space-invader the second would go to ground... Its recommended to have a resistor between the LED and the ground to prevent shorts...
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Ok, thanks. I was affraid to put it in the incorrect pin.
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