Step 1: Materials
- copper tape (local hardware store or electronics store should have it)
- LED (any size and color)
- 3V coin cell battery (I use CR2032)
- scotch tape
- colored pencils, tissue paper, etc. (stuff to make it look nice)
**NB: if you can't find or afford copper tape, aluminum tape works just as well and costs less.
Step 2: Design Your Circuit
Here's my design, but you can design anything! If you're going to use more than one LED, I suggest a parallel circuit design. I've found my circuit designs work best with no more than 3 LEDs per battery.
Step 3: Measure Length of Tape Needed
For this specific project, I used three pieces of copper tape:
- 1 piece of copper tape that ran from one lead of my LED to the battery
- then 1 piece that ran from my battery to the switch
- and finally 1 piece that ran from the switch to the other lead of my LED
**NB: You can solder to the copper tape, so if you have a break you can reinforce it with solder. Just be careful not to start a fire or burn your card. If you can't solder or don't want to risk it, make sure when extending a piece of tape, you sandwich the two pieces together. Simply laying them on top of each other is not enough to carry the full current.
Step 4: Prepare the LED
Bend this lead up and into a circle
The shorter lead of the LED is the "-" negative lead and should connect to the "-" negative side of your battery.
Bend this lead up and into a square
Step 5: Prepare Battery Holder & Switch
Paper Battery Holder Tutorial
Paper Electronics Template Cards
Step 6: Make Your Circuit & Enjoy!
then connect your battery's "-" negative side to another piece of copper tape, extending it out to create one side of the switch
finally, with a third strip of copper tape, complete your switch and connect the tape to the "-" negative lead of your LED