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.

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Blue Lamp (CB16849E)
This simple inverter was found in a 1997 documentation. Its purpose is to apply a high voltage to a...
Polarity Reverse Protection (CB15055E)
For this circuit, the polarity of the power input does not matter, as the output terminals will...
PUT SCR control (CB13906E)
In the figure we have the way to control an SCR with a programmable unijunction transistor (PUT)....