New answers tagged

1 vote

How to run Power Functions LEDs from a 12v supply?

using the numbers on the page that Michael linked to, I calculate 1mA per LED which is very low. When increasing the voltage to 12V I calculate 1.7mA per LED which is of course 70% brighter but still ...
4 votes

How to run Power Functions LEDs from a 12v supply?

https://www.philohome.com/pf/pflights.htm So the leds draw 2mA, a voltage drop of 12-9 = 3 V is required. So Ohms law says you need about a 1.5 kOhm resistor in series to have the leds shine at the ...

Top 50 recent answers are included