Active Low Pass Filter (CB6726E)

This circuit was obtained in an American publication of 1970, making use of components of the time. Components may be replaced by equivalents.

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Fuzz Effect (CB1293E)
This circuit can be interleaved between guitars and guitars to give the fuzz distortion effect. The...
80m Transceiver (CB17092E)
This transceiver circuit was found in a 1997 documentation. The circuit operates in the 80 meters...
Charge Monitor and Alarm (CB1256E)
This circuit uses a GE optical coupler. Equivalents can be tried. The circuit is from the GE...