1. Learn how to control the LEDs.

2. Work out what components I needed for inputs (I didn't have a lot to work with here).

3. Make an Arduino sketch that could control the LEDs with what components I did have.

4. Prototype the electrical circuit.

5. Design and print and enclosure for the Arduino Nano and buttons. This also meant learning how to use openSCAD and overcoming printing issues.

6. Design and print the hotshoe mount, extension arms and holder for the LED ring.

7. Assemble the printed parts. A hot glue gun was used to secure the LED ring, the NANO, and the little circuit board in place.

8. Test it out.

9. Upload to HackaDay!