Suggested by General Electric in a 1968 documentation this integrated amplifier uses a component of the era, the PA237. The circuit runs on 24 V and excites a 16-ohm speaker.
This circuit was obtained from a National Semiconductor manual from the 1990s. The circuit employs a...
This circuit causes an LED to flash at a frequency determined by capacitor C1. The circuit can be...
Suggested by Fairchild in a 1980s publication, this multiplier uses operational amplifiers from that...