Found in a 1967 documentation this circuit can be applied to any operational amplifier. Components without values determine the frequency to which the circuit is tuned.
We found this circuit in Intersil documentation from the 1980s. The circuit applies to other...
Found in a 70s RCA transistor manual, this circuit is recommended for mass-positive cars of the...
This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time....