Astable 555 (CB21101E)

This 50% duty cycle configuration was found in a Popular Electronics from the 1990s. The operating frequency is given by C1.

Distribution Amplifier (CB19012E)
This amplifier for distributing audio signals appears in other articles on this website and even...
MOSFET Parameter Meter (CB21398E)
This circuit was found in a 1964 MOSFET applications manual. The circuit uses period general...
Time Light (CB18745E)
This circuit works only with incandescent lamps, timing its activation at intervals that depend on C1....