3mm Bipolar Red / Green Leds
for Control Panels and signals
2.0 - 2.2 volts dc 20 milliamps max
use 560 ohm 1/2 watt resistors for 12 volts dc
These are perfect for use in control panels as a way of telling which way your switches are thrown....or you can bend them down( maybe paint the back siver or black, and use them as signals at trackside as shown below
Click here for instructions how to make your own hood for these signals
Below is a wiring diagram for using ac and a combination of diodes and resistors to get 4 different states
( 3 different colors - red - green - yellow ) from one led