This circuit was found in a 1965 General Electric manual. What it does is give a warning if you leave the vehicle with the headlights on or lights inside.
This circuit was found in Raytheon's 1967 documentation. The circuit uses an operating of the era,...
This circuit was obtained in a 1982 English magazine. This circuit can be used both as a simple...
With this circuit it is possible to divide the frequency of a rectangular signal by values between 2...