This TTL circuit consists of a frequency divider or converter that has values selected by a switch. The circuit is from Radio Electronics from December 1980 and must be powered by a voltage of 5 V.
This 9-bit DAC circuit was found in the RCA CMOS integrated circuits manual of the 1970s. The...
This circuit, found in an American publication from the 1970s, produces an audible tone in a...
This simple battery charger circuit was found in a Radio Electronics from June 1959. The resistors...