PTT or Push to Talk is the control that switches the speak-hear function on a transceiver. This circuit was found in the magazine of radio amateurs 73, in an edition of the 90s.
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...