Calibration Setup Problem

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  • #33610 Reply

    Hi Guys,

    I got some problems with the initial calibration:
    when I measure TP1/TP2 I get over 60k! Same for TP3/TP4

    Also I measured the voltages on the Opamp pins and there is one value off: Pin 5 shows 2,5V, the other pins are just fine.

    With that in mind, I didn’t dare to solder the two jumpers.

    Any idea what I could have messed up?
    Cheers from Germany <3

    #33613 Reply

    Remember that when you measure across the test points, you are actually measuring the resistance of the LDR, not the trim pot. Are you able to lower this value when you turn the trim pots?…you may have to turn them a lot to notice any change (they are 25 turn pots).
    The voltage on pin 5 is fine for now…It can actually be that low and still be fine.

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