Driving a Voltage Regulator with PWM

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  1. - 26th June 2007, 21:36 #1
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    flotulopex
    flotulopex is offline Senior Member
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    Default Driving a Voltage Regulator with PWM

    Hello,

    Does anyone have a very simple example on how to drive (adjust) a Voltage Regulator with PWM?

    I have a +5V LM340 VR and don't know how to connect it to make it Current driven.

    This is what I built (simplified here) and this won't work for sure.
    <img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1793&stc=1&d=118289009 9">

    How do I do this a correct way?
    Attached Images Attached Images  
    Roger
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