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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Precision differential amplifier (CB20907E)
This circuit has a 60 dB gain and a bandwidth of 68 MHz. We find it in Maxim's documentation. ...
Voltage Doubler (MSB021E)
Figure 1 shows a hal-wave voltage doubler operating with the Power-supply voltage. Output current...
Very simple remote control (CB24458E)
This circuit uses an SCR as an active component, working only at short distances. The circuit was...