Thanks Phil,

It is an updated version of a table top rotor I did several years ago. http://www.tomdoyle.org/satellite/SatTrackerIPoint.html

The idea was to have a pointer that would point at the satellite so I knew where to point a hand-held Elk. It worked fine. This one is smaller and of course works with SatPC32.

The steppers are too good a deal to pass up. To keep the size and cost down they designed a stepper with a high step angle of 5.625 degrees. They are geared down 64:1. Amazing amount of torque for such a little motor. Five of them with ULN-2003 driver boards for $16. I believe they could turn fairly large bread slicer capacitors and a rotary inductor as used in antenna tuners. A homebrew mechanical automatic antenna tuner would be an interesting project.

http://www.amazon.com/USPRO%C2%AE-Stepper-28BYJ-48-4-Phase-ULN2003/dp/B00JB2...

73 W9KE tom...

On Fri, Dec 4, 2015 at 10:43 PM, Phil phil_lor@bigpond.com wrote:

On 05/12/15 02:31, Thomas Doyle wrote:

...

Hi,

http://www.tomdoyle.org/3dPrinterRotor-1

That's really cleaver Tom. I imagine that the rotator would only handle the lightest of aerials.

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