View Single Post
  #2  
Old 21-06-2005, 12:50 PM
AndrewC AndrewC is offline
Junior Member
 
Join Date: Nov 2004
Posts: 9
Default

The resistor is required to control the amount of current which will flow through the LED, 470ohm is the correct resistance for a 12V supply to get ~20mA which is the require current for most coloured LEDs.

Andrew...
Reply With Quote