A *relatively* cheap at-home physics experiment that demonstrates: quantum entanglement, antimatter annihilation, mass-energy equivalence, Compton scattering and photo electric effect.
I found an at-home quantum entanglement experiment described by George Musser in a 2013 Scientific American article. I decided to reproduce it, but also modernize it, using an Ardunio-based microcontroller for coincidence detection, USB logging to a computer, and python scripts for statistical analysis and graph generation.
After a favorable experimental outcome, highly suggestive of quantum-entanglement (2.47 observed scattering ratio vs. theoretically ideal ratio of 2.6), I decided to create an open source repository for all the code, as well as detailed documentation enabling anyone to replicate the process should anyone else wish to follow these same footsteps. Note that if one doesn't have any soldering tools, it will cost around 500 USD to put together, if one has soldering tools already, it could be done for closer to 300 USD. The main costs are the two Geiger counter kits, each at 115 USD, and the positron source (Na-22) which can be obtained for around 60 USD.
I welcome any feedback or critiques about the experimental design or my results.