I have a red LED that I just want to light up using the GPIO pins on the Raspberry Pi. I got it to light up using the 5v pin. I tried it on a GPIO pin with a simple python script and it failed to light. I tried to simply connect it to a 3.3v pin. The LED would light for maybe one second then turn off. I have tried a variety of different resistors and breadboard setups, but nothing seems to work. Is there a problem with my pi or something else?
I have a 330ohm resistor in this picture but I have used others.
I just recently replaced the cobbler and I am still having this problem. I have tested the voltages and straight from the pi they are perfect, 5v through the cobbler is perfect, but the 3.3v only reads less than 1 volt when tested through the cobbler.
I just tried using two jumper wires touching the pins rather than the cobbler and the LED still didn't light up. The voltage reading straight from the pins are perfect though