average voltage to dc

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Warren Thai Contact options for registered users 's Avatar (by Gravatar) posted on
September 15, 2007, 10:53 pm
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I need a circuit to take in a PWM signal (Vin) and output the average
voltage (Vo = D*Vin). Any ideas?



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Phil Allison Contact options for registered users 's Avatar (by Gravatar) posted on
September 16, 2007, 2:50 am
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Re: average voltage to dc



"Warren Thai"
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**  Any low pass filter does that.




.......   Phil





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eddie Contact options for registered users 's Avatar (by Gravatar) posted on
September 16, 2007, 10:47 am
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Re: average voltage to dc


a RC servo driving a pot does that
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Phil Allison Contact options for registered users 's Avatar (by Gravatar) posted on
September 16, 2007, 11:02 am
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Re: average voltage to dc



"eddie"

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**  Be careful:   the modulated pulse signal that RC servos operate from is
a  " PPM " one  -   for  " Pulse Position Modulation "  &  not PWM.

With PPM,  the high period varies from 1 to 2 mS with a repetition rate of
circa 50 Hz.

There is also a frame pulse that sets the number of servos to be controlled.





.......   Phil









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