The PA222 integrated circuit used in this project from an American 1967 documentation is not common today. The circuit can deliver higher power with lower fidelity.
This simulated circuit uses a 741 (Operational Amplifier), but other operational amplifiers can be...
Using the 555 and 4020, this timer was found in the July 1994 Radio Electronics magazine. The...
This circuit was found in American documentation from the 1980s. The integrated circuit used is a...