Star Tracker

With this, you can take long exposure pictures of the night sky without resulting star trails. Instead of spending hundreds or 1000+ for a lens, you can get similar results with this.

Maker/DIY

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Attribution

The design type is widely spread, I do not know who came up with it first.

Description

  • Source code provided, Inventor CAD files provided (student licenced)
  • excel sheet to calculate the rotation speed table included. Needed if you use other dimension, threads, motor
  • the stepper driver is powered directly with 5V from the powerbank. The power input pins are not used.
  • My experience: Polar Finder Scope is not needed, at least for wide angle shots
  • One Button control:
  • Plug in USB cable
  • 1st Button Press: rotates to initial position and starts tracking
  • Button Press: go back to initial position and continue tracking

Materials and methods

I printed in PLA, since warping of ABS could affect accuracy. Nylon would be perfect i guess, if you can print it.
The "coupling flex" is printed in soft PLA.
- 2.5mm drill bit
- M3 thread cutter
- 9mm thick board
- hinges (low play)
- Powerbank used: eStuff 2200
- Bearings: 12 x 8 x 3.5mm
- Stepper Driver: Easydriver
- Endswitch
- Thread insert: Adapter 3/8" to 1/4"
- M5 threaded bar, M5 long nut (20mm)

Documents

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

743564ba4e1c01350ec50932fc439839?default=blank&size=40Max Nielsen commented ago

Thank you verry much.

8e6f4c0a7d3d93347951801f9aed5489?default=blank&size=40wololooo commented ago

Added two pictures of the inside of the electronics box. (Arduini Micro, Stepper Driver (easydriver), pulldown resistors

743564ba4e1c01350ec50932fc439839?default=blank&size=40Max Nielsen commented ago

Hello

Verry nice and clean design, I'm in the process of building it :-)

Do you have a picture of the inside of the electronics box.

8e6f4c0a7d3d93347951801f9aed5489?default=blank&size=40wololooo published this design ago