Harmonic Distortion Meter (CB26187E)

This complex circuit was found in the 1993 edition of the Electronics Experimenter's Handbook. Most of the components are still common today.

| Clique na imagem para ampliar |

9 V x 40 mA power supply (CB12849E)
This power source was found in an old Argentine publication from 1973. The transistor could be the...
Tape Recorder Nonitor (CB24170E)
With this circuit it is possible to monitor a signal that is being recorded on an old tape...
Integrator with sample and hold (CB8876E)
This circuit is from a 70s documentation. The maximum sampling rate is 800 Hz. The operational...