This circuit with automatic gain control was found in the July 1988 issue of Radio Electronics magazine. The circuit is based on a transconductance operational amplifier.
This LM380-based circuit was found in documentation from the 1980s. The components are current, and...
This circuit can be used to test continuity or even semiconductors. We found the configuration in a 1987...
This is one of the first games that came out in the 70s. This one is from a Radio Electronics...