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Listed in ALL Scales, category: Signals & Detection Units Detection Units & Accessories
Simple Circuits(TM)
Circuitron #SA-3
SA-3 Block Signal Animator
Walthers Part # 800-5542
A scale, $24.95, not currently in stock at Walthers, Expected: Special Order

Complete, simple detection with timed three-color block signal animation. Signal turns red as train passes. After last car clears signals, adjustable time delay starts (up to 30 seconds). After time delay, signal then turns yellow. After another adjustable time delay, the signal goes back to green. For 2-rail DC or 3-rail AC track power in all scales.
Fir Bi- and Tri-Color LED-type target signals and 2-rail DC track power. DCC compatible. Amber hue fully adjustable. Provided with Opto-Sensor. Output will drive only one LED. Adjustable for room-light intensity. 10-18V AC or DC input.

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