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.
Found in a Popular Electronics from the 90s, this circuit generates a signal that depends on the...
This circuit was obtained from old documentation, triggering when there is a power cut on the...
A passive mixer with few components is that of the circuit shown, found in a 1982 documentation. As readers...