This simple 15 V power supply was found in an article describing an assembly in the January 1987 Radio Electronics magazine. The power supply is used to power the circuit described.
The output voltage depends on the zener diode. Zener in the range between 1.2 to 12 V rated to 1 W...
This shield with full-wave triggering was found in the Radio Electronics Experimenter magazine of 1989....
We obtained this circuit in a Maxim documentation from the 90s. The circuit is based on the...