This circuit was found in the September 1989 issue of Radio Electronics magazine. The circuit uses components that support modern equivalents such as the operational amplifier.
Found in a 90s American documentation, this circuit can be used as a shield, just change the...
Found in Radio Electronics, this circuit doubles the voltage of the 117V power grid to activate...
Found in the May 1988 issue of Radio Electronics magazine, this circuit is sensitive to small...