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How do I hack a postage scale? so my arduino can read the weight? Answered

I need to hack a small postage like scale so that my arduino can weigh something?  looking to weigh something in the 0-5 pound range.
There are many scales out there, here is one:
http://www.harborfreight.com/digital-scale-95364.html?utm_medium=email&utm_campaign=b&utm_source=1002
thanks,

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user
fungus amungus (author)2011-10-06

I look to adafruit for such questions.

Here's an answer: http://www.ladyada.net/learn/scale/

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user

You're assuming there is an accessible serial output, the OP's doesn't seem to have one.

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user

Not quite. I was assuming that he hadn't bought one yet. The link was to point him in the direction of scales that have a serial output as an alternative.

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user
steveastrouk (author)2011-10-06

Open it up. There'll be a strain gauge inside, connected to an amplifier. The output of he amp will be sent to a ADC, or straight to the processor. You need to aim to find the output of the sensing amp. It MIGHT be a recognisable part.

Steve

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