I have looked around and while I find that digital ( 3 wire ) RC servos com=
monly like 4 to 6 volts for power with a nominal value of 4.8 volts......=20
A 1.5 msec pulse is mentioned as required to send the servo to it's neutral=
 position.

I can find no mention of the voltage range for "zero" and "one" values to t=
he control input. I also see no mention of the impedance the control input =
presents.  Is a zero =3D=3D> zero to 2.4 volts ?  Is a one =3D=3D> 2.4 volt=
s to 4.8 volts ?  Is there hysteresis ?

gus in denver  99gus
--=20
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