phototransistor – Experimental Engineering

Cheap Ball Mouse

March 6, 2011February 11, 2011 The Engineer

Cheap old style ball mouse. PS/2 interface. Top removed from the mouse, the ball fits in the gap in the centre. The slotted discs are visible which contact the ball & move relative to the surface the mouse is on. PCB removed from the shell. Pairs of IR LEDs &

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Computer Gear

Logitech Cordless Ball Mouse

December 15, 2010 The Engineer

This is an old legacy wireless mouse from Logitech. This uses a ball rather than optical technology. Bottom of the mouse, showing the battery cover & the mouse ball. Top removed from the mouse, showing the PCB inside. The smaller PCB on the left supports the microswitches for the buttons

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