On Friday, March 16, 2012 9:02:58 PM UTC-7, Bill M wrote:
I just installed a quartz battery movement into a wall clock that once had a
mechanical movement. I lost the pendulum capability and I'd like to find a
simple circuit that would move the pendulum with the same speed as in a
normal clock. I'd like to use the same pendulum the clock used before I
replaced the movement, which is 3" diameter bob and 12" long. The circuit
would be best powered from a single or double C or D batteries. Anyone have
any ideas or links?

Thank you,
Bill

Bill, you can buy quartz movements with pendulum for about $10 and they come with a pendulum stem that is cuttable to length as well as a bob.

Neil S.