LM3914 with expanded scale (CB24652E)

This LED bar graph circuit was found in the October 1980 issue of Radio Electronics magazine. The circuit shows how to change the LED drive values.

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Ultrasonic Proximity Sensor (CB21312E)
This circuit was found in a Popular Electronics from the 90s. The circuit uses a ceramic capsule as...
Amplifier for light beam (CB26241E)
This circuit for link or alarm was found in the Encyclopedia of Electronic Circuits Volume 5 of...
15W Stage (CB23628E)
This 15 W power stage was found in Radio Electronics magazine from August 1959. The transistors are the...