This complete video game circuit was found in the May 1978 issue of Radio Electronics magazine. The circuit includes the power supply and timing based on the MM5710N.
This radio version with a transistor for a crystal phone was found in a Japanese magazine from...
In this circuit of Texas Instruments an incandescent lamp is used as a light source, and lenses are...
This source whose voltage depends only on the zener diode used, can supply currents up to about 3 A....