Astroinseguitore - Barn door tracker

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Here is the rewritten text: The Astrochaser was designed to pursue the apparent motion of stars caused by Earth's rotation, eliminating the characteristic star trails typical of long exposure photography not pursued. The Astrochaser can also be used as a Pan (or Tilt) head for panoramic photos. Required Materials: 1. 1 motor with 100:1 gear reducer http://www.omc-stepperonline.com/gear-ratio-1001-planetary-gearbox-with-nema-11-stepper-motor-11hs200674spg100-p-36.html 2. 2 bearings 6002 3. 30 cm aluminum tube, 15x1 4. 1 timing belt 18 teeth XL 037 5. 1 timing belt 45 teeth XL 037 6. 1 toothed belt 120 XL 037 For the control section: 1. 1 Arduino Nano 2. 1 StepStick 3. 1 LCD display 20x4 I2C 4. 1 membrane keyboard 4x1 5. 1 photo interrupter 4n35 6. 4 resistors 10 Kohm 7. 1 resistor 68 ohms 8. 1 printed circuit board MamoUnit With this configuration, a resolution of: Motor reducer = 200 x 99.05 = 19,810 steps Timing belts = 45 / 18 = 2.5 In practice, to make one complete rotation, it takes 19,810 x 2.5 = 49,525 steps Resolution = 360° / 49,525 = 0.00727° approximately Earth's rotation = 23 hours 56 minutes 4 seconds Translated into milliseconds = 86,164,000 Therefore, one step every: 86,164,000 / 49,525 = 1,739.808 ms