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Updated version 1.1 of Power meter 140409-1

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While developing software for the power meter (by Luc Lemmens) we encountered a problem with the maximum sample rate of the A/D-converter. In free running mode we can use the maximum sample rate of 860 Hz. But the ADS1115 only has one A/D-converter. So real simultaneous measurement of voltage and current with the maximum sample rate is not possible.
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