Astra V21 Barn Door Astro Tracker with Straight Drive Screw
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Astra V2.1: Barn Door Astro Tracker with Straight Drive Screw

Barndoor type astrophotography tracker without the need for bending screws Travelfriendly easy to pack and can be driven by any 5V USB power source An Arduino Uno or Nano is used to control speed of the screw to maintain constant angular ...

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