Red, Yellow, Green and
Orange Led's works on 1.8 to 2 volts, White, Blue and Purple need 3 to 3.5
volts for proper operation. All 3mm & 5mm LED's operate on 20ma or 10 ma
when noted. A current limiting
resistor should be used when lighting LED's in most applications. To find
the correct resistor subtract led working voltage from your source voltage
then divide by .02 for 20ma and .01 for 10ma, use a resistor equal
to that amount or greater, do not use a smaller resistor. If
there are any questions we are always more than willing to help if
possible.