Ohms law, electronics math question

[cauzomb]

Another good one is to leave 1F caps laying around charged.

LOL! happened a couple times with broken camera flash caps. We used to charge them up, then use alligator clips to apply about 590v 55kuf to either end of various food items from the school cafeteria...The best was turning cooked rice into arc-lamps.

[cauzomb]

The next step is to divide the dropped voltage by the LED current to get the value of the dropping resistor. If you divide volts by amps, you get the resistor value in ohms

Cool, got it right..

And got this right too.

Do not put LEDs in parallel with each other. Although this usually works, it is not reliable. LEDs become more conductive as they warm up, which may lead to unstable current distribution through paralleled LEDs. LEDs in parallel need their own individual dropping resistors

[cauzomb]

buttoned up the LED install following "llammas" 360 controller LED mod guide, only they don't have much info regarding the wireless controller... so I put in a switch that sits between the thumb stick and D-pad. Now I just gotta figure out where I can tap into on the circuit board.... I also have some LED's inside the back/select buttons, cut the tops out of those and glued in some air-soft bb's, then sanded them down a little bit.. The red led's on the back/select buttons are powered when the rumble motors are activated... The Abyx buttons are switched, but currently they turn off once I turn the controller on... maybe too much voltage drop to make them work? I might get away with bypassing the resistors..