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Circuit Board Design Prepare the circuit board and copper board for the LED lamp. From "Craft Lab" episode DCLB-238

(Continued from page 1)

Syuzi Pakhchyan prints the pattern on the copper board.

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	Figure A
	Figure B
	Figure C

Preparing the Copper Board

1. Scrub the copper board lengthwise with a nylon abrasive pad or steel wool to scuff up the surface (figure A). After scrubbing, wash your board with dish soap and dry with a lint-free cloth.

2. Lay the board, copper side facing up, on a heat-resistant surface such as a smooth piece of plywood. Run your iron over the plywood a few times before laying the copper on top.

3. Align the printed pattern (figure B) facing down along the edges of the copper board. You will have an extra 1/4-inch of paper hanging off either the left or right side of the board.

4. Pre-heat your iron set at the highest setting. Rest the iron on top of the board and printed pattern and press down really hard. Do not use any steam. Hold the iron on the copper board for approximately 30 seconds, and then remove the iron and let it cool for a few seconds.

5. Place a glass baking dish filled with hot water in your sink. Grab the hot circuit board with a lint-free cloth and drop it into the hot water for about one to two minutes. Caution: Board will be hot!

6. Peel off the top layers of paper and let the board soak for another minute.

7. Rub the remaining paper off with your fingers (figure C) or use a soft bristled toothbrush. Rinse the board with soap and warm water and dry it with a lint-free cloth.

   Tip: If any part of your pattern has rubbed off, especially the circuit portion, use a black permanent marker to make any necessary modifications.

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