This circuit provides a 5 V negative output with a maximum current of 1 A. The circuit is from the 1993 Linear Technology Applications and uses common components at the time.
This circuit was found in Radio Electronics magazine from February 1962. The sensor is an LDR, and the...
This circuit carries small batteries of Nicad that can be connected in series in number of up to...
This circuit was found in a 1967 US documentation. It shows how to build a gain control by digital...