9V power source (CB21164E)

This simple circuit with a 5V regulator was found in an American documentation from the 90's. The output voltage is adjusted in a trimpot.

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Non-Inverting Gain 100 Amplifier 741 (CB16755E)
We found this common application of the 741 operational amplifier in a 1977 documentation. The...
Electronic Fuse (CB15845E)
This circuit, found in an old 1967 publication, cuts the current from a source when the current...
LM3914 with expanded scale (CB24652E)
This LED bar graph circuit was found in the October 1980 issue of Radio Electronics magazine. The...