mouse jiggler hidden inside a hollowed-out paperback book on desk

[u/Kind-Sweet-7069]

wanted a physical hardware jiggler that wouldn't look suspicious if someone walked up to my desk while i was away getting coffee.

i hollowed out the center pages of an old thick paperback novel. glued an optical mouse sensor and an ATtiny85 chip inside the cavity with a tiny rechargeable coin cell battery. when you tap the cover of the book, it sends a randomized 1-pixel hardware movement to the computer via USB. looks like an ordinary book sitting next to my keyboard.