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.

Presence Sensor (CB14895E)
The movement of the indicator needle indicates when something or someone approaches the sensor, an...
SCR Synchronized triggering (CB21544E)
This circuit was found in an Electronic Design from 1968. Its purpose is to produce synchronized trigger...
Wideband VCO (CB24867E)
Using the CMOS IC 4046 we found this VCO in the November 1984 Radio Electronics magazine. The...