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 transistor circuit with complementary output appeared in Radio Electronics magazine in April...
This simple source with zener regulation is ideal for experimental projects with operational...
This 12 dB per octave filter was found in a 1977 digital audio publication. The circuit requires a...