Shielded computer mouse

Currently the only way to remove the EMF emissions from the USB mouse is to wrap it completely with aluminum foil, leaving just a small hole for the optical sensor and another small hole for the wire.

It is also possible to shield the mouse circuits with aluminum foil inside the mouse cover, but in this way there are more little holes in the shielding and some EMF actually escapes out.

The results with an external shield are very good, the pain in the palm and the fingers have disappeared, the sensation is just like the PS2 mouse.

The following are some pictures of a shielded mouse used for testing.

This pictures show a modified mouse used for some tests, so the mouse wheel is covered by the aluminum shield. With an internal shield instead the mouse wheel remains usable and the mouse is externally identical to the original.

Read more about EMF emissions from mouse.