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 source, from a 1982 documentation, uses a triac to control the power and voltage applied to...
The amplifier presented is ideal for use in small monophonic sound systems, radios or televisions powered...
This wired control circuit serves both volume and balance between channels. We found it in Radio...