Aurora - 40 Channel Heliostat

Aurora is an array of 40 mirrors, each able to tilt in two axes, to track the sun movement and enable artistic lighting based on sunlight.

Skills: Python, Mechanical Construction, Project Coordination

CCCamp19: Prototype

We built a first complete prototype on-site during the Chaos Communication Camp 2019. Together with project initiator blausand and a handful of on-site volunteers, we went from a single-channel prototype to a full 40 mirror array in only two weeks. On arrival to the site, we ordered 100 servo motors from China, and set off to build everything else until they arrived 10 days later, often collaborating with local enterprises. We designed and constructed a frame from scrap aluminium extrusions, a suitable low-cost motor integration (x 80), and cut over 40 mirrors at the wonderful Glaserei Elsner. My role was prototype design, project coordination, and design and implementation of the electronics; as the project progressed, also leading the development of the control software.

(photos partially by blausand)

Vision

The name and shape of the project stems from the Aurora grain mill, situated on the Köln Poll harbour front. Our vision is to create a larger version (ø 8-10 m) and install it on the former mill’s building, replacing the original logo with a similarly shaped heliostat. The intent is to reflect the sun during sunset to the then shaded west bank of the river Rhine. This recently redeveloped former port area is known for known for the characteristic “crane buildings”.