We found this time base circuit in a timer project from the August 1972 Radio Electronics magazine. The circuit takes advantage of the 60 Hz signal from the power grid.
This circuit marks the number of minutes of a telephone call on a display, starting when the...
This circuit was obtained from a 1966 General Electric documentation. It can serve as a basis for...
This is a change from the previous interface, also used an uncommon operational one today. The...