The configuration shown was found in the October 1974 Radio Electronics magazine. The integrated circuit used is the CD4001 and the power supply depends on the application.
The integrated circuit used in this amplifier is not common today. The circuit is from a...
This circuit produces paced steps of an engine whose speed can be adjusted in the trimpot. The key on...
Many reed switches can be wired in series to perform na efficient alarm as shoen in the figure....