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Mouse Mods -- where to get power?

A

Alterscape

Weaksauce
Joined
Nov 13, 2003
Messages
78
Has anyone worked out the best place to tap power from inside your average optical mouse? I'd like to use as much of the current that -isn't- going to the actual mouse electronics as possible to power some other electronics I'm adding.

Also, has anyone ever reflashed a mouse's microcontroller to add more functionality/use unused I/O pins?

Just some thoughts.. googled around a bit, figured if anyone knew, this crew would..
 
USB or PS/2??? on usb u could just feed off the 5V pin...probably a 5V on ps/2 also, but not sure where it is... any whoo, usb or ps/2?
 
If your mouse is PS/2 you can get +5V from pin 4 and GND from pin 3. If it is USB, +5V is pin 1 and GND is pin 4. Available power is limited to about 500mA (2.5 watts).
 
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