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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Feedback H Bridge (CB11281E)
This shield with feedback to control the direction of rotation of DC motors up to 500 mA with...
VHV Generator (CB17089E)
This very high voltage (VHT)generator was found in a 1995 documentation. The transistors must be...
Nipkow amplifier for disc (CB7241E)
Found in a 1967 documentation, this infrared amplifier is intended for use in a Nipkow disc camera...