PIC 16f877 A/D conversion Allegro ACS712

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  1. - 3rd August 2009, 02:05 #5
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    ukemigrant
    ukemigrant is offline Junior Member
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    Default Diagram we use

    I drew this diagram to illustrate the different units involved.

    For a numeric value of 166 read from the analog-to-digital converter, Darrin's equation brings back 11.58 and Mackrackit's brings back 11.47.

    They are close enough given the low resolution arithmetic taking place especially if you just round up to no decimal places.

    I can attest to the annoyance of one meter showing 9 Amps when the equations bring back the numbers above.

    http://www.picbasic.co.uk/forum/albu...0&pictureid=25
    Last edited by ukemigrant; - 3rd August 2009 at 02:06. Reason: Stupid image did not show up
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