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  1. #1
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    Help on driving CS8190 Driver

    hi dears.
    I'm a bit new in Electronic, and now want to make a tachometer. I designed protection and supply circuit according to CS8190 datasheet and another tachometer's PCB. I've produced the 8.9v DC voltage for pin8 of CS8190 and a square wave to pin3. but now I can't see any thing in pin2. Can any one guess where the problem can be?

    •   Alt2nd February 2013, 14:56

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  2. #2
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    Re: Help on driving CS8190 Driver

    Are you using the cherry data sheet circuit - http://pdf1.alldatasheet.com/datashe...RY/CS8190.html fig 7?
    Frank

    - - - Updated - - -

    Are you using the cherry data sheet circuit - http://pdf1.alldatasheet.com/datasheet-pdf/view/58057/CHERRY/CS8190.html fig 7?
    Frank


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    •   Alt3rd February 2013, 19:46

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  3. #3
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    Re: Help on driving CS8190 Driver

    yes Frank,I am. And my last problem has been solved , now I'm trying to calibrate the tacho according the given data. I calculated C4 and Rt(mentioned in cherry datasheet) for 5KHz Max freq. and 278deg, 0.47uF and 17.37Kohm(using a 20K potentiometer), but i think they're not properly calculated, because the needle didn't work right



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