This high voltage amplifier is based on Elantec components based on high voltage feedback. The supply voltage range is 50 to 230V symmetrical and the quiescent current is 56 mA.
The circuit, shown in the figure, activates a relay when the logic level applied to its input, from...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This circuit makes use of the LM11, 112 or 113 operatives and was found in a 1980s documentation. The...