Simple Electronic Thermometer (CB525E)

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Published: Monday, 27 July 2015 00:00

Written by Newton C. Braga

This circuit can also be used as a simple thermoscope (temperature changes indicator) in the school’s laboratory. The sensor is a diode and the meter has is 200 µA full-scale micro-ameter. The circuit can be powered from 6 to 9 V supplies and current drain is very low.