This circuit powered by photovoltaic cells was found in the November 1998 issue of Electronics Now magazine. The circuit uses two motors and can follow a line thanks to its sensors.
This circuit is from an American 1964 documentation. Transistors of the time are used, but modern...
Intended for SSB and CW reception, this circuit was found in old English documentation. The...
This circuit is from a Popular Electronics from the 90's. The circuit activates a buzzer with...