LED Helmet III Build Date: Oct 2014 Source code, schematics, and CAD files: github.com/RussellKramer/LEDhelmet
It’s blank PCB panel. That’s a thin layer of copper on top of a fiberglass board. Circuits are created by milling away some of it.
Russell Kramer Projects 
The 3rd and 7th picture from the top are fascinating and beautiful.
What is the metal you are using for the wings in the 3rd picture?
It’s blank PCB panel. That’s a thin layer of copper on top of a fiberglass board. Circuits are created by milling away some of it.
Okay its copper. I like the design on the circuit boards as it reminds me of Mayan hieroglyphs.