This anti-bounce circuit was found in a 1967 US documentation. Modern transistors such as the 2N2222 can be used. The circuit acts as a shield.
This 200-mW amplifier uses one of the first commercial power transistors. The circuit is from a...
Decade counters, such as the 4017, can be cascaded as sourcing signals with the frequency divided...
We found this circuit in an American 1980s documentation. The circuit uses a piezoelectric transducer...