Suggested by General Electric, this circuit with triac is able to reverse the rotation of a motor through a DC control signal. The circuit applies to AC servos.
This circuit was found in a 1980s documentation. The diodes may be general purpose diodes such as 1N34...
This circuit is from an April 1988 Radio Electronics magazine. The circuit is retriggerable and...
The TL431 integrated circuit consists of a programmable shunt regulator with an internal...