This mouse circuit was found in the January 1997 issue of Electronics Now magazine. It uses a PIC that must be programmed according to the movements.
In the figure we have the way to increase the current capacity of an operational amplifier. The...
This different circuit uses a relay as an oscillator, whose frequency is determined by C1, and to...
The circuit presented makes use of the LM340 and a power transistor that can be the 2N2955 or more...