4 ms·
My mind went to an optical sensor. Either interrupt a beam with the pendulum or attach a small reflector to the arm.
by joezydeco 3y ago
My mind went to an optical sensor. Either interrupt a beam with the pendulum or attach a small reflector to the arm.
- NikkiA 3y agoOptical sensor would be the best option - both induction and hall effect will add a very tiny eddy current brake effect that will slow down the pendulum. Probably imperceptively, but it'll be there and will affect time keeping eventually.