This circuit is from LinearTechnology Applications of 1997. The circuit uses components of the time used to raise the voltage of a battery from 3 to 6 V.
Here is a very simple robot circuit that follows the line driven by a small 3 V sevomotor that...
This circuit, which provides a power of up to 3.5 W, can be supplied with voltages from 9 to 14 V....
This circuit transmits the signal taken from a telephone line to a receiver placed nearby (up to a...