Expanded Scale Voltmeter


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  1. #6
    Join Date
    May 2004
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    NW France
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    3,653


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    Hi, Adam

    The batteries in the models are supposed ( LOL !!! ) to be High Amp ... for the voltage not to "swing" too much when servos draw current.

    That's why AA High cap. NiMh cells are NOT to use ( too high internal resistance )

    You're right, we must register to download files at Mr CAM's ... some kind of courtesy !!!

    For the files ... I think you got the scheme, I do not know why happend, but the Hex file is no more downloadable ( Forum doesnot bear .bas and .hex anymore !!! ) so, ... find the source here !!!

    This program has been designed for low amp use ( Tx batt survey ), and the current is quite constant.

    For Rx side ... things are much more complicated as current drawn can reach 2 or 3 amps for short periods, and the "quiescent" current is around 50 - 100 mA.

    A not too false approach, is to move all plane control surfaces ON THE GROUND ... and see if buzzer ... buzzes ! ( current is then 1 - 1.5 Amp - so voltage has to be fixed for such current )
    If it buzzes ... it means it's a good thing to charge batts ...


    You'll find the Current / Voltage curves in the thread I gave you the address ... but those curves are for the Batts used in Txs ... ( 2000 - 2500 mAh LiPos )
    You have to take YOUR BATT dedicated curve ...

    Don't hesitate to Ask for any help ... the batt world is a Wild world !!!

    Alain
    Attached Files Attached Files
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    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************

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