This circuit was found in a 1967 documentation. It is intended for triggering a xenon LASER. Observe the high operating voltages of the circuit. The components used are uncommon today.
This UHV generator circuit or ultra-high voltage was found in a 90s Electronic Engineering 90s. The triac...
When the sensor is activated the relay turns on powering na external load such as a buzzer siren...
This transistorized receiver was manufactured in the 1960s and distributed worldwide. The diagram is...