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 from an old American publication uses a 12 V transformer and an incandescent lamp in an...
The integrated circuit used in this regulator is quite old. Its 1970s casing is still made of...
This crystal oscillator uses a common transistor and its frequency depends on the crystal used. We...