This circuit uses a contactor having been found in a 1987 publication. More modern equivalent devices may be used. The circuit has neon indicator lamps.
This circuit was found in documentation from Analog Devices from the 90s. The circuit uses...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
Found in a 1964 Electronic Design, this circuit generates pulses based on an avalanche diode of...