> >Use a piece of unetched double sided circuit board. Cut a small round >piece about the diameter of your batteries. The copper on one side is >isolated from the other side by the board material between them. > >Solder a low value pot to two wires, then solder one wire to each >side of the board. Put the board between two batteries in series or >between a battery and a battery terminal in the laser. > >Adjust the resistance with the pot to control the brightness. > >Joe Larkin Or, how about using a laser that's appropriate for the dark skies of the canyon? Steve and Rosie Dodder sdodder@xxxxxxxxxxx Visit my web site at http://www.stargazing.net/Astroman -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.