The Ebay link didn't work for me, but the specs are a bit low for accurate my purposes, but may be OK for general viewing purposes. Generally for good accuracy 5000 Quadriture counts per revolution is more common. But the resolution can be whatever you want.
The main advantage of the inclonometer in the US Digital link is that it is a completey self contain unit that requires no drilling of the holes at all in the OTA or DOB base. A quick easy option, although the delivery price for a single unit is quite high.
If I do make the boards for the electronics I may (more than likely) consider bringing in the Encoders in bulk as well, this may take a bit of time though, how long I do not know.
With many people using computers and Rubylith screening used on site the PC is becoming a better alternative. I will also be testing Astronomist for PDA Win and PALM later.
With CDC program the tracking was brilliant, I could see the cursor following my scope with so much ease. Worldwide Telescope didn't track so well, I had to keep clicking the Centre button to find out where my scope was positioned. Still very early days yet, with more time I sure I can finish it off quickly.
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