We found this circuit in the October 1987 Radio Electronics magazine. The triac must be controlled according to the heater. The transformer has a low current, of the order of a few hundred mA.
The advantage of this circuit lies in the fact that it does not need a negative source to generate...
This simple audio generator with the 741 was found in a 90sTexas Instruments. The circuit...
With this circuit from an old 1973 publication it is possible to use a small speaker as a...