$2 Mini graphics tablet

Step 3 Making the pen step 1

Now place the bearing in the top part of the screw and place the battery ontop of the bearing. Make sure the battery's positive side is on the opposite side to the bearing.

Now simply tape the screw, bearing and battery together leaving only the batteries positive side exposed.

The ball bearing allows the battery to rotate and remain flush with the touchpad whilst in use

I have taped over the screws thread to make it more comfortable to hold