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Re: [AVR-Chat] Re: RC servo control with codevision

2005-01-24 by Zack Widup

I think that might be what I want.  I want to use the servo to rotate the 
antenna to a certain position, turn off the pulses, make a measurement 
with a receiver, then rotate a small angle and repeat.

I need to turn off the pulses when making a measurement because the pulses 
generate noise that wipes out the receiver if they are continued. The 
receiver is operating in the 300 to 700 kHz (yes - kHz, not MHz) range.

Maybe I should just experiment!  I have a couple of those R/C servos in my 
junquebox.

Zack


On Mon, 24 Jan 2005, Dave VanHorn wrote:

> At 05:29 PM 1/24/2005, Zack Widup wrote:
> 
> >I thought of that but I never implemented it.  I do have a question about
> >the servos, though.
> >
> >I was considering using one of them to rotate a small directional loop
> >antenna.  From the servo spec sheet I located, it appeared that you have
> >to continuously send the pulses to the servo in order to have it hold its
> >position.  Is that correct? Or is there a way of making the servo hold
> >its angular position if the pulses are stopped?
> 
> NOT correct. The servo stops trying to maintain it's position if the pulses
> stop.
> So, if you send it to 90 degrees, and you keep pulsing it, then you'll find
> it about impossible to change.  If you stop the pulses, then you can rotate
> it by hand, but it will be difficult.
>

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