Suspension sping.

This was THE most important break through in getting the penulum to behave consistantly.

This replaced the ball bearing I was using. This is a "suspension spring", just like whats used in quality grand father clocks.

I made this out of a feeler guage and two tiny squares of aluminum. This is what the pendulum hangs from.

This made the pendulum swinging/timing much MUCH more consistant and reliable! (this concept was invented by Christiaan Huygens around 1650 and still used today)

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