LCD BARgraphs

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  1. - 22nd June 2007, 07:48 #11
    Acetronics2's Avatar
    Acetronics2
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    Wink Problem well explained is half solved ...

    Hi, Darrel

    Looks you're perfectly right ... the PIC ADC does not have the 60 dB dynamics(? ... I meant range !!!) our friend Ioannis looks for.

    IF you were involved in radios ... may be the ref. "CA3089" will remind you some Vu-meter designs ... ( Use of pin 13 ...)

    So, If we used such a Log amplifier to translate from Log to lin scale ... we could easily get this 60 dB Scale ... may be more !!!

    Of course ... the drawing is in my Dataroom ... and I still must have a PCB somewhere !!! ( Was a very old Elektor application for an Audio Level-meter ( Sonometer) ... as the CA3089 can work with audio frequencies ... )

    Read you soon

    Alain

    PS: found another with a NE604 Chip ...70 dB covered !!! ... heeuuuuuu file weights ... 325 kB DAMNED !!!

    Hi, Savnik

    + 3 dB means the double ... for whatever you want.

    but + 6 dB for Power means +3 dB for corresponding voltage
    Last edited by Acetronics2; - 22nd June 2007 at 08:23.
    ************************************************** ***********************
    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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