Found in a Popular Electronics from the 1990s, this circuit monitors the voltage of a power supply or battery. The trigger voltage is adjusted with a potentiometer.
This circuit can be used with input voltages up to 750 V, regulating the current between 200 uA...
This circuit is from the 1972 RCA Integrated Circuits Manual. The circuit can be used as the basis...
This is the traditional version of a neon flasher, found in a 2004 documentation. The capacitor...