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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TDM3700 Proximity Detector and Color Sensor
This new AMS device consists of a digital color sensor and proximity sensor that also incorporates an infrared...
Small Amplifier (CB991E)
This amplifier was found in an old publication of 1990. With the changes, it may still be...
LM741 Variable Gain Amplifier (CB25920E)
This circuit was found in a May 1981 Radio Electronics magazine article. The circuit is offset...