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any information on connect uC with straingauge

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tobb

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www.linear.com/pdf/an43.pdf

I want to built weight measurment control with Micro controller which have 10bit ADC on it. But my problem is i have no idea how to connect straingauge or loadcell to ADC off micro controller port. the straingauge that i have it give very small value different. ie output A give 3.05 volt and Output B give 3.052 V when 15 Kg load. How could i measure this different voltage between A & B with uC.... Thank for your help
 

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techie

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Since you are using a 10-bit convertor, I dont suppose you need too much of a resolution. A simple low drift opamp like OP07 can do the job. (Dont use general OPamps like 741, they have a large drift). For better performance, you might have to use 2 or 3 stage amplification.
 

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