Circuitron 800-5530 SD-3 Signal Detector Layout Wiring Woodland Scenics SP4171 Scene-A-Rama Projects

Woodland Scenics SP4171 Scene-A-Rama Projects & Dioramas: Student's Handbook

plus a bar and grill and nine other buildings

die-cast frog with a power contact to optionally energize the frog and  prevent loss of power when a locomotive is passing through

Includes a special gear box with coupler

Circuitron 800-5530 SD-3 Signal Detector Layout Wiring Woodland Scenics SP4171 Scene-A-Rama ProjectsCircuitron 800 5530 SD 3 Signal Detector Drives any single target tri color LED type signal to red, green and amber aspects. Amber hue fully adjustable. May be controlled by three position switch or automatically by detector circuits such as BD 1 (minimum of three blocks required). 10 18V AC or DC.