Found in a 1960s documentation, this circuit uses a transistor to drive a relay as well as a set of neon lamps with high voltage power supply.
This circuit is from a National Semiconductor manual from the 90s, using an integrated regulator for...
This circuit was found in a 1980s Signetics documentation. The integrated circuit is from the era. The...
This circuit is used to measure the power of transmitters from 3 to 30 MHz with powers up to 100...