This temperature control was found in General Electric documentation from the 90's. The circuit uses a 10k ohm NTC sensor as a sensor. The triac must be in accordance with the controlled load.
Using a mechanical drive motor, this circuit was found in old documentation. The engine turned off the...
This circuit produces the hum of a mosquito, scaring the female of the species that are the ones...
This digital circuit was found in the September 1980 issue of Radio Electronics magazine. The...