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 circuit prevents damage by accidentally reversing the power supply polarity. The circuit is...
This circuit acts as a NOR gate for LED drive from TTL outputs. The circuit must be powered from a 5...
This circuit is from the 80's, making use of components of the time. What the circuit does is...