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  1. 06-10-2015 #21
    cropwell's Avatar
    Lives in Nottingham, United Kingdom.
    cropwell
    Last Activity: 28-05-2023 Has been a member for 9-10 years. Has a total post count of 1,646. Received thanks 170 times, giving thanks to others 30 times.
    I think we have the problem !

    The earth return paths are not connected. The blue wire from the sensor should be connected to the 0v (gnd) terminals on both power supplies and also (of course) to the 0v ground on the BoB. This is the most likely explanation of the symptoms.
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