4066 Latching Touch Switch (CB25241E)

This circuit was found in the November 1989 Radio Electronics magazine. Power supply depends on the application.

600 kHz Oscillator (CB505)
For the 600 kHz range coil is formed by 35 turns of 28 AWG wire on a ferrite core with a diameter...
5 A switched regulator (CB8805E)
Found in a 1970’s documentation, this circuit uses components of the time, uncommon today. |...
Fixed Passage Sensor Alarm (CB18115E)
This 2003 circuit uses two types of sensors: by reed-switch and by infrared. If the magnetic...