This circuit uses a dual-gate MOSFET, a rare component today. We found it in American documentation from the 1980s. The rest of the components are common.
Suggested by General Electric in 1965 documentation, this flasher has a control circuit with a...
Found in an Elektor from the 90s, this TTL circuit can be used as a shield without any bouncing...
This circuit was obtained from Dutch documentation from 1967. It uses transistors of the time...