The costs that I show are not a unit purchase price but the price of the parts with my (free) labor to assemble. I have built and successfully tested on a small scale the LCC block detection circuits and the LCC block signal circuits that work with JMRI. The main skill needed is through pin soldering. I also built test boards so that circuit boards I built could be quickly and methodically tested. After playing with low cost servos I decided to go with the tortoise switch machines. There are HO layouts successfully using the low cost servo switch machines.
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