This circuit for the power grid was found in the June 1969 Radio Electronics magazine. The SCR and diodes are rated according to the power of the controlled load.
This circuit generates approximately sinusoidal signals from the rectangular signals generated by a 4093...
This two-digit timer was found in the 1983 Special Projects issue of Radio Electronics magazine. The...
This circuit activates a recorder from the signal obtained from a telephone line in the service. It is...