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1answer
61 views

Bidirectional solid state switch for solenoid

I'm building a circuit to control a flip dot display, which is basically a matrix of solenoids which you control with bidirectional current across the 25 columns and 7 rows of the board. The ...
1
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3answers
622 views

Electrical locking mechanism (on timer)

I'm looking at making a very basic, automatic cat feeder for the odd occasion I'm not around at 2pm when she gets fed. I figured I'd keep things simple by having a door that is spring loaded, but held ...