This circuit of the 80s makes use of an operational one of the time. It can be designed with modern operationals and must use a symmetrical power supply.
This circuit was found in a 1977 RCA documentation. The source must be symmetrical, but the...
This light effect circuit was found in the July 1971 Radio Electronics magazine. The circuit is...
This simple protection circuit protects microammeter type instruments against overloads. The curve...