What you need
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Lift grey shell off and place to the side to reveal:
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ADC and Logic board
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Bluetooth module
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Strain gauges
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Battery holder
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The ADC and Logic board contains:
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Bluetooth module
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Power button connector
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Battery and sync button connector
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Strain gauge wheatstone bridge connections
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The topmost connection for each of the four bridge connections is the ground; relative to this, the two middle connections should be at 1.2 VDC, and the bottom should be at 2.7 VDC
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