I'm completely brand new to electronics and just bought a breadboard kit to try and get my feet wet. I have a 9V battery and I'm trying to fire up a green LED.
I have a 330 Ohm resistor in series with the LED and if I measure the current coming out of the resistor I'm only getting about 4.5 mA, and I think I need at least 20 mA to fire up the LED. See the attached picture.
What is not visible in the picture is that the red wire is connecting to an output that reads 5V.
If I connect the LED directly to the Elegoo board it lights up fine. Any suggestions?]1