Step 1: Materials
A4 Coloured Paper
Surface Mount LEDs US: Digi-Key
3V Coin Cell Battery US: Digi-Key
Step 2: Download and Print your Templates
*Use page 2 if you're going to screen print the cards.
Print page 3 of the template on a colored piece of paper. This will be the main body of the card. Once printed just fold it in four, making sure the text is on the inside as shown.
Step 3: Cut out your image
Step 4: Trace the Circuit with Bare Paint
When attaching the LED, make sure there is a gap for it to sit. Don't paint all the way through as this will cause a short circuit! Also, make sure to note the polarity of your LED so that you put the battery in the right direction. In this case I have put my positive (+) legs facing left.