Circuitron 800-5530 SD-3 Signal Detector Layout Wiring Includes a special gear box

Includes a special gear box with coupler

All Mode Programming with Operations Mode Read Back reads back CV values right on the mainline

Shelf Ready Rocks are cast to nest side-by-side and top-to-bottom

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

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Circuitron 800-5530 SD-3 Signal Detector Layout Wiring Includes a special gear boxCircuitron 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.