Can someone look over this picture on Circuits with LED? Answered
Ok, After countless stupid topics and stupid questions I just made a quick circuit in 5 minutes, to see if whatever I'm thinking in my head is correct. I really do need someone to verify, I plan on doing a bigger project after I understand how resistors work and all that nonsense. According to my calculations, I have 1 LED, Green, which runs 2.1V at 20mA. To power this, I used 2 1.5V AAA batteries. So that means I have 3V powering a 2.1 V LED. I have to drop .9V, so I did .9V/.02mA and got 45ohms. I need 45ohms of resistance to deliver 2.1V of power to the LED. (In the pic I used 3x15ohm resistors, again, I don't know how to wire them either...) Now This is my wiring, I am not sure how you link up resistors, I linked them all to the negative wire which I think was wrong...Someone please verify though.