Hi all,
I am a RC truck enthuiast mainly Tamiya 1/14 scale , I wish to add a home built LED lighting systems to my trucks , all the LEDs will be wired in series to avoid issues should one go down.
My problem is I am not sure what resistor to use , most of the LEDs are 3.2V forward voltage with 20ma forward current the supply voltage is 7.2V .
I found an online calculator that says use a 220 Ω but a friend of mine says it should be nearer to 400Ω.
I am now stumped.Please help.
Andyb
I am a RC truck enthuiast mainly Tamiya 1/14 scale , I wish to add a home built LED lighting systems to my trucks , all the LEDs will be wired in series to avoid issues should one go down.
My problem is I am not sure what resistor to use , most of the LEDs are 3.2V forward voltage with 20ma forward current the supply voltage is 7.2V .
I found an online calculator that says use a 220 Ω but a friend of mine says it should be nearer to 400Ω.
I am now stumped.Please help.
Andyb