average voltage to dc

- W
- Warren Thai
  
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posted
16 years ago

Sat, Sep 15, 2007 10:53 PM

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
  
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posted
16 years ago

Sun, Sep 16, 2007 2:50 AM

"Warren Thai"

** Any low pass filter does that.

....... Phil

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- eddie
  
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posted
16 years ago

Sun, Sep 16, 2007 10:47 AM

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- Phil Allison
  
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posted
16 years ago

Sun, Sep 16, 2007 11:02 AM

"eddie"

** 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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