The circuit shown, with the printed circuit board, was found in an article in the June 1990 issue of Radio Electronics magazine. Integrated circuits must be equipped with heat sinks.
Using a 4046 PLL this circuit recognizes a 1.6 to 1.8 kHz tone by driving an output LED. The...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
June 2017 - Mouser Electronics announced the availability of the new Texas evaluation module for...