This grounding test circuit was found in an American 80's documentation. The circuit is for the 110 V power grid but can be changed to the 220 V power grid.
This multi-function filter can be used as a shield controlled by TTL signals. At the high level it...
This 100 kHz crystal oscillator uses 7404 to generate square signals. We found it in a Popular...
This circuit supplies 5 V from two AA batteries. The output current is 4 mA, resulting in an 11 mA...