Non Inverting Amplifier (CB6438E)

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

Metal Detector (CB15795E)
This metal detector was found in a 2001 Poptronics, but it can still be easily assembled, as the...
Random neon lamps (CB7236E)
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...
Stereo Balance Indicator (CB16346E)
With this circuit it is possible to have a safe indication of the balance point for the signals of the...