This circuit triggers a relay when the set temperature is reached. The circuit is from an old documentation. The relay may be equivalent according to the transformer secondary voltage.
This shield circuit can serve as a basis for a digital mixer or simply for a switch without noise...
In the figure we have the way to implement a sinusoidal oscillator with the 4093 IC. The component...
This circuit was found on a Radio Elettronica (Italy) from April 1974. The circuit can still be...