pay phone charm wall full Pay phone charm pay phone charm closeup full Pay phone charm

Just in time for every prankster’s favorite holiday, Alex Schlegel made these chained up gems attached to this payphone, much like a giant Asian schoolgirl’s cell phone charm:

I designed the faceted gems in Solidworks, printed out templates for each face using images I made in MATLAB, cut out each face from 18g. mild steel sheet on a hydraulic shear, brazed all the pieces together with brass brazing rod and an oxyacetylene torch, cleaned up the edges with a 4″ grinder, and then brazed them together with chain. I could only find zinc-plated chain so I burned off all the plating with the torch, which is probably not too advisable considering zinc fumes are bad and can give one something called “zinc flu”. Finally I rusted the whole getup with a ferric nitrate solution I prepared by dissolving steel wool in nitric acid. I secured the charm to the pay phone with a padlock for safekeeping.

becky stern headshot Pay phone charm

Becky Stern

Becky Stern is director of wearable electronics at Adafruit Industries. Her personal site: sternlab.org


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