This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a sensor and has a Bargraph scale with the well-known LM3914.
This synthesized generator circuit was found in an article in October 1980 Radio Electronics...
This circuit is from a publication in the United States in the 1980s. The basic integrated circuit...
This circuit was found in an American magazine in 1976. It doubles the frequency of TTL signals in the...