This circuit, which can be used as a shield, was found in General Electric documentation from the 1980s. The coupler uses a photo-SCR. The circuit admits equivalent components.
This analog meter circuit was found in the September 1989 issue of Radio Electronics magazine. The source...
This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...
Maxim Integrated's MAX17682 integrated circuit is available at Mouser Electronics, a...