12V-latch

  
This circuit controls a solenoid by the operation of a single push-button switch. The circuit will supply loads of over 1 A and can be operated up to a maximum speed of once every 0.6 second. When power is first applied to the circuit, the solenoid will always start in its off position.
12V-latch - schematic

Other features of the circuit are its automatic turn-off, if the load is shorted, and its virtually zero-power consumption when off.



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