The circuit was found in the February 1992 Radio Electronics magazine. The scale can be changed by changing R2 and R3.
This light meter can be mounted with equivalent integrated circuit. The power is made by a single...
This circuit was found in a 1967 General Electric manual. It is intended for the control of high...
This shield circuit with an optical coupler was found in an 90s EDN. The circuit can be used with...