The circuit shown, with the printed circuit board, was found in an article in the June 1990 issue of Radio Electronics magazine. Integrated circuits must be equipped with heat sinks.
The 4028 CMOS IC not only contains the complete decade counter, but also the 7-segment decoder...
Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of...
With this circuit a logic output signal from a microcontroller or other digital TTL configuration can...