This circuit was found in an American documentation from 1969. The circuit is a multi-indicator with resistors typically 47 k for R1 and 100 k for the others.
This circuit allows the division of the frequency generated by an oscillator with the 4069 by two,...
This circuit is from a 1977 Radio Shack documentation. In it we have the activation of an LED for...
Found in American documentation from the 1990s, this circuit causes the fuse to blow in the event...