>I want to use a old RC aircraft servo in one of my pic applications...Can=
 someone direct me to a page on the net. (I get a error when searching the=
 archives)

        http://www.goldmine-elec.com/FreeInfo.htm

>1. The servo (FUTABA S100) has three wires (red, black and white). Can=
 someone help me with the connections (eg. black - gnd; red - +5V; and=
 white +5V signal from pic???)

        Yep, remember the +5v needs LOTs of current sometimes - around 100-200ma=
 depending of the force of the servo.

>2. As I understand the servo move one increment in one direction when a=
 100ms pulse is applied and in the opposite direction if a 200ms pulse is=
 applied?

        More or less. 1.52ms neutral, you can go above and below.

>3. Is there some feedback from the servo that you can determine the=
 position of the rotor (if not how does the servo know the center position=
 every time I switch it on in the aircraft?

        Servos has only internal feedback. It does not know it's center position.=
 It goes to the center position with a pulse every 1.52ms. If you rise or=
 lower this value, it goes to that direction. The servo automatically=
 "centers" when you turn the aircraft on, because the transmitter is=
 sending the "center" pulse to the servos. Get a osciloscope and look at=
 the signal, moving the sticks of the transmitter. You'll find lots of=
 interesting things.


--------------8<-------Corte aqui-------8<--------------

        All the best!!!
        Alexandre Souza
        xandinho@interlink.com.br

--------------8<-------Corte aqui-------8<--------------

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