Found in a 90s American documentation, this circuit that was used in cars of the time, detects low temperatures and light by activating a warning relay.
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...
This common metronome configuration has already appeared in several of our articles and projects. This...
Using a 4018 IC and one gate of the 4081 it is possible to divide the frequency of digital signals by...