Category Archives: Electronics

Motor Anomalies

After wiring up a “new to me” GN engine, with another NCE decoder, I found that the engine ran in reverse when it should have gone forward like my older PCRy engine, (the lower engine in the picture). So I tried the motors in two other Athearn blue box engines, which I acquired two years ago, and they all  turn in the same direction as the newer GN engine motor. Now I have to decide if I want to modify the PCRy engine or all the other three engines. It only takes switching the + and – wires on the motors. I use brass clips on all the decoder wires so switching them is relatively easy.

Converting an Athearn PC board

I recently set out to convert an Athearn/Digitrax digital PC board from using light bulbs to powering LEDs. The process involves removing the eight limiting diodes and increasing the two series resistors from 150 to 1K ohms. Since I could find no schematic of the PC board I drew a circuit representation on my CAD program to aid in identifying what circuits to modify. The project has proven to be a great success.

LED lights on DCC conversions

I am currently converting an Atlas Alco C-424 to DCC and have run into a problem with converting the cab and rear light systems into LED’s. You can see the two long plastic light tubes used in the factory setup with one light bulb for both. Since the Soundtraxx MC2 board has separate light controls I want to incorporate two LED’s, but where and how to add them. I will post this question to the internet and take the problem to the experts at our club.