Mirrors on the 3D-printed array are angled just right to reflect light into a message. ... (don’t miss the annotated Python code) because [Ben] goes into just the right level of detail.

All the source code created by Bartlett to create a 3D printable hexagonal mirror array is published on GitHub under the MIT license. GitHub --bencbartlett / 3D-printed-mirror-array: 3D-printable ...