This circuit was found in the January 1989 issue of Radio Electronics magazine. The circuit sends audio signals by modulating a low-frequency carrier through the power grid.
We have other circuits like this on the website. This is from a 1967 Electronics World. The Triac...
We found this circuit in an integrated circuit cookbook from 1974. The circuit can provide larger...
This circuit was found in a 1977 Radio Shack documentation. The unijunction transistor can be...