Pendulums for fun and profit!

These are just self starting pendulums that run full time in decent light.

Build Date: Dec 20, 2002

The very first kit pendulum and am happy to say that it works 100%. The Solarbotics kit is on the way we are just currently working on the documentation.

Build Date: Aug 16, 2002

My second home built pendulum the first used a brute force motor swinging a hard drive platter, built in 1999.

I call the circuit the "force coil" using a sensitive feedback loop with two complementary transistors... no real point going into detail that will be in the book.

Although a bit more mechanically complex this design will free swing for 7 minuets! The beauty of this is the heavier the pendulum the less friction there is. Oh, and im beginning to really like sintra in construction, will probably see more of that in newer bots.