This Railroad Crossing Signal Track Detection and Light Driver Board operates from accessory voltage. On board are up to two detection circuits, a realistic flasher for the LEDs, and circuitry to support gate operation. Typically railroad crossings are activated by a train coming from either direction. And continue to operate until the train leaves the protected block. On your railroad, this protection block may be defined by Infrared beams. This supports up to 4 parallel tracks. Depending on the units used, the height of the beam may be at wheel level or car/engine body level. In addition, this board also supports isolated sections of track. Why both? Simple; some model railroaders use the isolated track to trigger occupancy signals for small or large section of track. Our appoach allows a separate source for detecting a train in the protected crossing block.
The product image shows the prototype bare PC board. The final board will be different and will support multiple applications.