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ds1803 works well--thanks all

Discussion in 'Electronic Basics' started by sanjay k boddhu, Jul 2, 2004.

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  1. hi ,
    thank q guys for ur interest...i have used a difference
    amplifier using opamp..where the gain can be varied from -4 to 4...and ds1803
    works well...i have finished my complete design


    give the input to negative and positive terminals of the opamp

    for negative terminal...Rin=10 k and Rf=40k
    Rof=13.4(Rf/gain) gain= Rf/Rin (40/10)

    for positive terminal...uses a 10k potentiometer (with a end at input
    signal andother at ground) and the wiper of potentimter is attached to
    the opamp terminal....

    so varing the poetentiometr wiper from input voltage to ground u can
    get gains from 4 to -4

    i have succesfully used ds1803 controlled by 8051 microcontroller to
    implement this

    -bye guys...thanks again
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