I'm not 100% sure what resistor I need.
* Red Seoul P4 LED (forward voltage: 2.5V, mA: 800-1000)
* MR FX board
* AW 3.7V Li-Ion battery (2900mAh)
I understand the FX board needs ~0.5V, which would leave ~3.2V for the LED. A 1 Ohm 2 Watt resistor should be enough in this case.
Li-Ion batteries are 4.2V when freshly charged though.
If I used a 1 Ohm 2 Watt resistor, would the initial higher voltage of the Li-Ion battery fry my LED?
Bookmarks