Humidity Monitor (CB24940E)

Using a period sensor, this circuit was found in the February 1986 issue of Radio Electronics magazine. The sensor is a Philips of the period.

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witching Noise Suppressor (CB13688E)
S The purpose of this circuit, found in a 1975 publication, is to suppress the noise that occurs when...
AM and FM IF calibrator (CB16767E)
This circuit generates signals for the calibration of IFI (Intermediate Frequency) of traditional AM and...
Electronic Thermometer 741 (CB24713E)
This dual-operator thermometer circuit was found in the September 1982 issue of Radio Electronics...