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Motorized Stars Tracker by pchretien is licensed under the Attribution - Share Alike - Creative Commons license.
© 2011 by pchretien
Instructions
- Print all parts. You may have to design a specific mount for your motor.
- Cut one 9 1/4"" long 3/4" x 3/4" piece of hard wood.
- Cut one 12"" long 3/4" x 3/4" piece of hard wood.
- Bind a 1/4" filted rod with a radius of about 11.45" (291mm)
- Assemble all parts as displayed on the pictures. The distance between the center of the bearings and the center of the rod must be 11.45".
The electronic is built using an Arduino, an Alegro 5804 driver and a cheap stepper motor. I did this some time ago and, as of today, I would use different parts such as the Adafruit motor shield and the Nema 17 motor. You'll find more informations about this on my blog at: basbrun.com/2009/07/10/arduino-timer-interrupt/
Following is a short video of the mount in action:
youtube.com/watch?v=q-sFi-ZAZ7o