This is an easy one, but all your geeky friends will want it.
- two network cards (or something similar, a circuit board with a regular size)
- paper (the easy way is to cut an old notebook)
- a spiral (same as before)
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Step 1: "Clean" the Cards
First, dismantle all of the old cards, leaving only the printed circuit, and maybe the processor.
You can use a soldering iron for it.
Updated: In fact, I used the pliers, it's quicker.
Step 2: Cutting and Piercing
At this step we are going to pierce the circuits to permit the spiral can go in its place.
Step 3: Finish!
Now assemble the circuits and paper with the spiral, and you will get it.