This is a circuit that allows remote activation of a power supply. The circuit was used with a timer of the time. It appeared in the November 1973 issue of Radio Electronics magazine.
This circuit is from a Radio Electronics magazine from August 1974. It used one of the first...
This circuit was found in an English magazine from 1973. The magazine no longer exists, but the...
This circuit for measuring very low currents was found in an American documentation from the...