I'm not building a walking robot. A friend of mine with an interest in building BEAM robots introduced me to this, and ever since we've been building little test circuits to get this to work. At any rate ... an explanation of a 'quadcore' http://www.beam-wiki.org/wiki/Quadcore ....so my test ckt consists of four 1 k resistors, four 100uF caps, a Schmitt trigger IC, and four LEDs I'm not exactly sure what I'm doing wrong, but I haven't gotten this to work properly. It's supposed to oscillate between each of the four cores separately one after the other. Instead, it oscillates in pairs (two at a time). The wiki article I pointed to describes it working in pairs, but doesn't seem to provide information on how to make the processes run separately unless I'm missing something. Footnote - I could cheat and just do a single core attached to a ripple counter and a quad switch .... but I'm determined to do this exercise properly to learn something. I'm guessing BEAM is supposed to be more about biological analogies as opposed to straightforward practicality LOL.