Installing a Semaphore Signal on My Donner Summit Layout Using a Servo Drive – by Duncan McRee Photos by the author Combining an R/C aircraft servo with a little electronics to bring a semaphore to life ...
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atching a semaphore change aspect as a train goes past is always fun and a detail I’ve been wanting to install on my Donner Summit layout. In this article I will describe how I placed a working semaphore at the town of Colfax using a servo as the
Page 56 • Mar 2012 MRH Installing a Servo Semaphore, page 1
drive mechanism. The electronics were no problem as I am the owner of Tam Valley Depot, so I have a nice board for driving a semaphore - the Dual 3-Way II. Among its many semaphore offerings, Tomar makes a nice lower quadrant semaphore which I thought would work well.
One nice feature of using the Dual 3-Way to motorize a semaphore, is that it takes advantage of the unique
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