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The apparatus has two operational stimulus lights and three perches equipped with microswitches .
After all, it was probably just a stuck microswitch , no big deal.
Solder the wires to the button microswitches , and attach a small phone jack to the bottom of the footstool.
All microswitches and counters were controlled by a central power source connected to a digital timer set to turn on one hour after sunset and turn off one hour before sunrise.
We've run string from one end of our milking parlor to the microswitches that control the electric motors on the other end that open and close the parlor's three doors.
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