Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The circuit can be modified to trigger a high brightness white LED.
This switched filter was found in the 1969 documentation. The FET should be current-matched and eventually...
January 2017 - Mouser Electronics already has the new Ultra Low Drop controllers from Toshiba...
Using a MAX644 this circuit was found in the April 1989 issue of Radio Electronics magazine. The...