In the figure we have the basic way of using the 3-and-a-half-digit counter 7107. The circuit is from an Electronics Now from November 1996. It uses two dual displays.
We found this circuit in the 1964 RCA transistors manual. The transistors used are uncommon today,...
This circuit was found in the May 1989 issue of Radio Electronics magazine. The circuit requires a...
Equivalent transistors can be used on this 80's circuit. Any general purpose PNP transistor can work...