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.
The integrated circuit used in this filter is not very common today, but the configuration can be implemented...
This circuit can be controlled by a TTL signal. The signal can come from common logic or from the...
This interesting circuit is for controlling a small robot that searches for a light source. The...