Windshield wiper controller

  
This circuit provides complete speed control over car`s windshield wipers. They can be slowed down to any rate even down to four sweeps per minute
Windshield wiper controller - schematic

The controller has two principal circuits: The rate-determining circuit—a unijunction transistor connected as a freerunning oscillator, and the silicon-controlled rectifier which is the actuator.




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