This circuit is based on the TDA3810N. We found it in the March 1992 issue of Radio Electronics magazine. The circuit consists of an audio processor capable of working with two audio channels.
This circuit was obtained in a publication for radio amateurs of 1977. It is used to reduce the...
This latching alarm using SCR was found in a Popular Electronics from 1992. The circuit triggers a...
This temperature alarm has maximum and minimum settings. We found it in the September 1971 Radio...