This circuit was found in a Popular Electronics from the 90s. The circuit has temperature compensation. Coil and capacitors depend on the frequency at which the circuit will be used.
This circuit makes use of high voltage transistors and can be connected to the 110 V (117 V)...
The opening of the sensor in this circuit of the 70's causes an integrated buzzer of the Sonalert type...
The circuit shown is from the component's datasheet, allowing the control of stepper motors up to...