UVIL: Backlit Blacklight Nightlight (or SteamPunk Indicator Lamp)

Step 3 Etch the top board / Layout the bottom board

After etching the top board using the process outlined at http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/ you will need another board to hold the LED's and batteries. The second board needs to be the same size as the first.

You will need to decide:

1.) How many UV LED's you want to use
2.) Where to place the LED's
3.) How to supply the power to the LED's

I took a little 1-LED coin-cell flashlight and replaced the white LED with a UV LED. This allowed me to shine from behind the board to see what different placements would look like. Bending the LED's over (rather than have them aimed at 90 degrees to the board) gives more coverage.

Once you have decided where to placed the LED's you need to decide where to place the battery (or power wires). You can get PCB-mount coin-cell holders - I cut a piece of battery contact from and old lamp, bent it, and riveted it to the board for one contact. The other contact is just a large pad on the board.

If you wonder why there are so many parallel traces on mine, it is because I wanted to see how well traces of different widths would come out of the etch.