A question came up a while back about magnets and how close they could be to our electronic machines. I emailed Husquevarna and this is what they said.
Here is what our Product Developement at R&D has given me as an answer: Our modern sewing machines have all solid state memories and they are not susceptive to magnetic fields. There shall not be any functional problem to have a magnet next to the machine No problem to add a magnet! Happy Sewing! While this may not be the same with every brand, I plan on using a magnet for my scissors etc as soon as I can find a good one.
good to know!