Suggested by Texas Instruments in 1968 documentation, this circuit uses components from the era. Modern diacs and SCRs can be employed.
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...