Retromatix based in London has created some cool solar powered robots using BEAM principles. BEAM stands for Biology, Electronics, Aesthetics, Mechanics and was invented by Mark Tilden. BEAM robots use simple analog circuits in favor of more complicated circuits using a microprocessor. See some of our first BEAM style robots on our build page. Wikipedia on BEAM robotics states:
Other rules that are included (and to varying degrees applied):
Click through to see a bunch of Wattson’s do their thing in the sunlight.