PWM on PORTG pin 3 on a 18F67k22

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  1. - 31st August 2014, 07:47 #1
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    richard
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    Default Re: PWM on PORTG pin 3 on a 18F67k22

    its actually a switch mode power supply that creates the 0-12v contrast voltage , the output voltage is inversely proportional to the pwm

    http://www.digikey.com/en/articles/t...-input-voltage
  2. - 31st August 2014, 08:13 #2
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    Default Re: PWM on PORTG pin 3 on a 18F67k22

    a better link
    http://www.jaycar.com.au/images_uploaded/dcdcconv.pdf
    see fig 3
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