Rate this post by selecting a number. 1 is the worst and 5 is the best.

Author Message   Jack Freymuller Rating: N/A Votes: 0 Posted on Tuesday, January 11, 2005 - 08:20 pm:    If you just want to see the needle move in response to light changes, try moving the cell up and down in its recesses. This will often break through the build-up of resistance at the contacts.