Unlike the previous circuit this one trigger when the temperature drops below the set value. The circuit is from June 1986 Radio Electronics magazine.
We found this circuit in an American publication from 1977. The integrated circuit is the 7400 and the...
With 3 transistors, we found this receiver in a documentation from 1966. The circuit has an output...
This circuit detects when a powered circuit suffers a malfunction, lighting an LED. The supply...