We found this circuit in the October 1978 issue of Radio Electronics magazine. The magazine article describes its assembly. The circuit is a 6-digit circuit using components from the time.
This circuit was found in a 1980 publication. It uses only 3 easily obtainable transistors. It is a...
We can use high value electrolytic capacitors in alternating current circuits with the...
Found in July 1975, Radio Electronics magazine this circuit can use any operating circuit,...