4049 Oscillator with Mark and Space (CB24857E)

With mark and space adjustment this circuit was found in November 1984 Radio Electronics. The base frequency depends on C1.

860 W dimmer (CB5279E)
This circuit was obtained from an old American documentation having a limited adjustment range....
Pendulum Circuit (CB24555E)
The movement of the LEDs in this circuit mimics the back-and-forth movement of a pendulum, making it...
Low Current Detector (CB6667E)
This circuit is from a 1967 documentation. It makes use of varicap and diode tunnel in addition to...