This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of components of the era, but modern equivalents can be used.
This circuit can be used as a shield for microcontrollers. The circuit is from American...
This car battery power supply was found in the June 1990 issue of Radio Electronics magazine....
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...