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 timer for a few minutes was originally indicated for photographic applications. We found it...
This circuit shows on the screen of an oscilloscope two signals alternately at a frequency that depends...
This circuit transmits to an FM receiver placed nearby telephone conversations. The coil consists of 4...