While in SwitzerFrance I was part of a CERN Robotics Club mission to send a helium balloon and sensor package (well, android phone) to the edge of space. Buy me a sandwich some time and I’ll regale you with the tale of the truly epic recovery mission, diagrammed below. To commemorate, I etched copper ‘mission badge’ keyrings for the four co-conspirators.
I’ve also included pics of a pendant with the Swiss mountains, CERN logo and date, for a friend who went home early.
This metal disc-cutter was worth every penny – I used to cut discs with a saw, and it’d take absolutely ages.
Drawing on the design with waterproof pen (permanent marker).
After etching with ferric chloride, and cleaning up a little with sandpaper/polishing cloth.
The backs have the CERN logo etched onto it.
Drilled and with split ring, magically they become keyrings!
I also made a pendant for a friend who headed back to Aus early.
Swiss mountains, made by doing several layers of etch.