Free the mouse

Popular Science - - TALES FROM THE FIELD - FABRICE SAUTEREL, PROJECT LEADER FOR LOGITECH G POW­ER­PLAY

We wanted to cre­ate a wire­lessly charg­ing mouse back in 2013, but we ran into a lot of road­blocks. One thing was fig­ur­ing out how to get enough power from a sin­gle USB con­nec­tion to a charg­ing pad, and then get­ting the mouse to pick up that juice as it moved over the sur­face.

An­other chal­lenge was la­tency. We had linked sev­eral elec­tri­cal coils un­der the pad’s sur­face, but it took up to a sec­ond for the mouse to switch among them as you used it. You can’t have that kind of in­ter­rup­tion in charg­ing. And then there was the pad’s lay­ered con­struc­tion, a sort of sand­wich of com­po­nents. That re­quired lam­i­na­tion to hold it all to­gether. In the first pro­to­type, we ac­tu­ally ap­plied the lam­i­na­tion with a baker’s rolling pin. Let’s just say there were lots of bubbles.

In all, we built about 10 dif­fer­ent de­signs over four years be­fore we got to that first one. Al­most ev­ery­thing about it is new. We had so many con­cerns, there were 12 or 13 times we thought about killing it.

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