A 555 timer chip may be pretty versatile as far as integrated circuits go, but when it comes to helping you take a load off, well, it's a little... small. The opposite is true of this version built by the folks at Evil Mad Scientist Laboratories
, however, which makes up for what it lacks in transistors and silicon with some first class foot-resting abilities. Best of all, the lab has provided a complete guide for building your own -- that includes the use of a CNC machine and laser etching, although it could also be built the old fashioned way pretty easily (or scaled up to coffee table size, for that matter) if you're so inclined. Hit the source link below for all the details.