cavelamb wrote:

An audio taper pot should help with the brightness question?


They really aren't intended for DC current. They will become noisy
in a hurry, with multiple dead spots in the carbon track. Delco found
out the hard way when they built some early transistor car radios with
DC on the volume control, then had to do a recall to repair them, and
modify them to prevent future failures. A wirewound Rheostat would be a
better choice, but wouldn't have a linear change in intensity.


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