Similar whiteboard wipers are available for about $10. I thought I'd give a few easy steps on how to make your own for only $1-2 depending on what you have available at home.
For this instructable you will need:
- Screwdriver (phillips or torx depending on your mouse)
- Glue gun
- Wire cutters (optional)
- Broken mouse
- Strong magnets
- Double-sided tape
- Pencil lead
Step 1: Gut It
My dead mouse had a screw on its belly. Removing this one screw let me prize it apart to expose its innards. I recommend you do this project with a computer mouse, not Canida's Mouse Mouse, real mice don't agree with magnets and their fur would get awfully mucky with whiteboard pens rubbing on their tummy.
Unplug the USB lead. Different mice might not be made with the same easy connector as mine, so if necessary, clip it off with some wire snips. (It may look cool with the wire snipped an inch from the input with the wires frayed, a patch as a prize to anyone that sends me a photo of theirs!)
Lift out the PCB and return the mouse wheel to the cradle it was in. Again, different mice will have different construction so you may need to keep part of the PCB in place so that your wheel will stay in the right place once finished. Put the PCB aside, it has loads of useful switches and other components which would be good for an electronics project later.
Step 2: Reassemble
Once you're happy, open it up again.
Step 3: Add Magnets
I chose to use a magnet I obtained from a broken hard disk drive. They're incredibly strong and have quite a large area. One is plenty for this project. You'd be surprised at how many people have a broken hard drive lying around, ask around. Failing that, some strong neodymium magnets would do the trick.
Lay your magnet(s) on the bottom of the inside of the mouse, squeeze on a load of hot glue from your glue gun and allow to set. You could super glue instead, this can however be brittle when dry and may break with all the slamming against the board.
Step 4: Adding a Base
Turn over your mouse, and with a pencil lead and paper rub it so you can see the outline of the base of the mouse. Cut this out and check it matches the bottom of your mouse.
Use the paper cut-out as a stencil to cut out the sponge. Reassemble the mouse then glue the sponge to the base of the mouse with a glue gun or super glue.