Non Inverting Amplifier (CB6438E)

This non-inverting AC amplifier was found on a Popular Electronics. The setting applies to any operational amplifier.

Noise Generator (CB7078E)
Published in Popular Electronics with the curious name of Obnoxious Noisemaker, this 1968 circuit...
Light Beam Alarm (CB25487E)
We found this circuit in the July 1992 issue of Radio Electronics magazine. An optical system...
Headphone Amplifier with the 741 (CB10248E)
This circuit was found in an English magazine from 1978, but it is still current, just change the...