This circuit was found in the Linear Applications Handbook of the National Semiconductor of 1994. Some of the components used are not easy to obtain, but equivalents can be used.
This simple signal injector oscillator was found in a 1981 documentation. The coil can be made...
September 2017 - Würth Elektronik High Power Ultraviolet LEDs can be obtained from Mouser...
This circuit works as a variable transformer that measures the power applied to a 110 V load (and...