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Thursday, November 3, 2011

An Anemometer Circuit

Air Flow Differences:

Q1 has a Higher Collector to Emitter Voltage than Q2, Therefore a Greater Power Dissipation. Air Flow causes Cooling which causes the Collector to Emitter Voltage of Q1 to Change. This Results in Different Power Dissipations and Also a Different Voltage across R1, which is detected and amplified by A2. 

Thus the Air Flow MUST Pass over Both Transistor Equally.

Copyright 2004: Chemelec


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