This circuit, found in a 1977 documentation, indicates when the grid voltage goes through zero. Under these conditions, it produces an output pulse whose duration depends on the capacitor.
We found this circuit on Radio Electronics from July 1990. It triggers a relay with a touch of the...
September 2016 - Mouser Electronics already has in stock the new IC TPS92515 LED driver from Texas...
The purpose of this circuit is to increase the current of a MAX1735 regulator to obtain an output...