Triggered amplifier (CB9007E)

Being able to function as a shield, this amplifier was found in documentation from the 70s. Equivalent operational amplifiers can be used.

Distortion Analyzer (CB25162E)
This circuit is designed to analyze the distortion of an audio signal. We found it in an article in...
555 Timeout Timer (CB9371E)
This circuit was found in a Popular Electronics from the 90's. It triggers an audible warning at...
Solar alarm clock (CB6861E)
This circuit was found in a Hands On Electronics from the 80's. The circuit emits an audible alert...