Circuitron 800-5510 SD-1 Signal Driver

Logic and output drivers to control any 3-lamp, 3-color block signal. Will power LED or lamp-type signals. LED-type requires common positive (anode) connection of all LEDs. Detection circuits (such as BD-1) are needed for a minimum of three blocks to display all three aspects. 10-18V DC input.

Circuitron Electronics for Model Railroads.