There are some KD couplers in G scale that come with servos that operate with the KD uncoupling system.
http://www.remoteuncoupling.com/html/11115.htm
I want to install them on my MTH one gauge engines. I'm wondering if I could use a circuit to energize the servos to pull the coupler open. When the power goes off, the spring system in the coupler would return it to normal.
Here's an example of what I'm saying:
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Joe-
im not personally aware if PS2 or PS3 is capable of driving a servo directly. But you could use one of these small servo controllers here natively with DCC or with the combined brainpower on the forum maybe the two can be merged so that one of the PS2/PS3 outputs can't trigger this controller board.
Thanks. I'll look at them.
You'd need a circuit that responds to the coupler voltage and provides the proper PWM drive to activate the servo. They're using a standard model airplane servo from the looks of things. This is very similar to what I did for this project.
The difference is that I had a steady voltage available (the TMCC smoke output) to drive my circuit. The circuit for this lashup would have to recognize the momentary pulse of the coupler and stretch it to accommodate the servo speed. You'd also need optical isolation for the input coupler voltage as it does NOT have a common ground reference. It could be done with another 555 for the delay, or perhaps drop a small PIC processor onto the circuit and handle all the logic in one chip.
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