This instructable is part of the one motor walker.https://www.instructables.com/id/How-to-build-the-one-motor-walker/
The bicore or suspended bicore is the name given to a little circuit created by Mark Tilden. He is the founder of BEAM robotics. BEAM robotics is an acronym for Biology, Electronics, Aesthetics, and Mechanics. http://en.wikipedia.org/wiki/BEAM_robotics
quote from Wiki http://en.wikipedia.org/wiki/Nv_network
"Probably the most utilized Nv Net topology in BEAM, the Bicore consists of two neurons placed in a loop that alternates current to the output. Input into the loop is given in the form of changing the resistance in each separate Neuron, which changes the rate at which the Neuron discharges, affecting the pace at which the loop oscilates.
WOW my head! Let me reformulate that for you.
The bicore is a oscillating circuit. In our case, it will oscillate a motor, like the wiper on your car.
The motor will go back and forth, back and forth when power is apply.
Look at this video to understand:http://www.solarbotics.net/bftgu/starting_nvnet_bicore.html
This instructable was a Flash animation for my BEAM website. You simply follow these instructions.