Found in a 70’s documentation, this circuit can operate with signals up to 10 MHz. The operational can be a modern equivalent.
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...