Digital Thermometer circuit up to 150°C

Published:2012/9/16 21:23:00 Author:Ecco | Keyword: Digital Thermometer, 150°C | From:SeekIC

This digital thermometer circuit can measure temperatures up to 150°C with an accuracy of ±1°C. The temperature is read on a 1V full scale-deflection (FSD) moving-coil voltmeter or digital voltmeter. Operational amplifier IC 741 (IC3) provides a constant flow of current through the base-emitter junction of npn transistor BC108 (T1). The voltage across the base-emitter junction of the transistor is proportional to its temperature.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Measuring_and_Test_Circuit/Digital_Thermometer_circuit_up_to_150°C.html

Print this Page | Comments | Reading(3)