A burning strip of carefully cut flash paper can encode information, which is then read by an optical sensor. I'd like to determine if it's possible to perform computations with nothing but flash paper -- using the shape of the paper as data and program, and the flame as the readout. Hamamatsu S7815 photodiode -- might be discontinued: https://www.google.com/#q=hamamatsu+s7815 Harvard Infofuse project: http://scienceblogs.com/notrocketscience/2009/05/26/the-infofuse-encoding-messages-using-colourful-fire/ http://gmwgroup.harvard.edu/research/index.php?page=17 http://dash.harvard.edu/bitstream/handle/1/12967828/84853636.pdf?sequence=1 Source for flash paper and flash cotton: http://www.dreamlandmagic.com/flash-paper.html Subscribe to my channel here: https://www.youtube.com/user/bkraz333