12 Sep
2002
12 Sep
'02
8:26 a.m.
Hans B Pufal wrote:
After taking the mouse apart, I realised that my
original diagnostic was
incorrect. It only has one LED, the other "LED" is actually a sensor.
I'm wondering if this is actually like a Sun mouse, and that second
"LED" is an infra-red one. The Sun mice have both LED and sensor
behind a completely spherical lens, one for X and another for Y
position.
The problem turned out to be simple, one of the
shperical plastic lenses
had come adrift when the mouse was dropped.
The first time my friend Beccy saw an optical mouse, she had to
find out how it worked, and took it apart. Moments later, two tiny
round lenses popped out and rolled away... they're quite hard to
find, being transparent!
(we did find them again!)
--
John Honniball
coredump(a)gifford.co.uk