Circuitron 800-5203 DT-3 Single-Direction Grade Crossing Detection Unit Undecorated Photo shows a completed and

Photo shows a completed and painted kit

These external devices can be anything that supplies an electrical connection between the input pins (1-14) and the pins marked "GND"

Track not included

3 Building Lights

Circuitron 800-5203 DT-3 Single-Direction Grade Crossing Detection Unit Undecorated Photo shows a completed andCircuitron 800 5203 DT 3 Single Direction Grade Crossing Detection Unit The Circuitron DT 3 Single Direction Grade Crossing Detection Circuit utilizes our proven Opto Electronic Detection and will provide accurate grade crossing action for a single locomotive or a 100 car train. There are absolutely no modifications to rolling stock necessary. The DT 3 is completely independent of the track power and is compatible with AC or DC track power as well as