On Wednesday 19 December 2018 03:22, Mukund Deshmukh wrote:
On Wednesday 10 Aug 2005 12:15 am, Rony Bill wrote:
port. Is he bluffing. Has anyone come across a mouse that damages a com port, works on a replacement board and damages that too in a few days?
Not necessarily true,
The com port carries a +12 volt and -12 volt signal. If they are shot circuited in the mouse, the serial driver on mobo are bound to get damaged. BTW all the rats (aka mouse) are not made equal -:))
Newer serial mice use only the rxd pin (data into the pc) for communication and the handshake outputs from the pc as their power source. If the serial driver on the mobo is unable to source sufficient current - they are not supposed to supply more than a few milliamps - it will burn out. Very old serial mice used power from the keybd din connector which is designed to supply about 100ma.
rgds jtd