This circuit for AC loads was found in February 1976, Radio Electronics magazine. The triac is common, and the times are given by the 20 MΩ resistor and the 1 uF capacitor.
Found in old American documentation, this receiver transmits signals via the power grid. We can...
This is a project that can easily be adapted for other purposes such as counting people, objects,...
We found this circuit in an English publication from 1969. It shows how we can implement a bridge...