Water Level Sensor (CB6557E)

This grid-isolated sensor was proposed by General Electric in 1966 documentation. The circuit currently uses common components.

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11-meter range receiver (CB23825E)
This remote-control circuit was found in Radio Electronics magazine from June 1962. It drives a...
Optical Communicator – Receiver (CB25536E)
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...
DC to AC Converter (CB25843E)
This circuit with a few watts of power was found in the April 1995 issue of Electronics Now...