We found this circuit in the October 1978 issue of Radio Electronics magazine. The magazine article describes its assembly. The circuit is a 6-digit circuit using components from the time.
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...