2009:Mouse details: Difference between revisions

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<u>USB Ball Mouse</u> -  
<u>USB Ball Mouse</u> -  
power from PC to mouse is +5vdc.


Pulse Rate = 5 micro second (top two lines)  
Pulse Rate = 5 micro second (top two lines)  
Line 11: Line 13:
<br>  
<br>  


1/200uS = 5000cycles/sec - - - this is the maximum detectable rate
1/200uS = 5000cycles/sec - - - this is the maximum detectable rate  


sensor wheel = 60 counts per revolution (CPR)  
sensor wheel = 60 counts per revolution (CPR)  


Calculate maximum detectable ground speed:
Calculate maximum detectable ground speed:  


&nbsp;&nbsp;&nbsp;&nbsp; 5000cps/60CPR = 83.3 max revolutions per second (rps)
&nbsp;&nbsp;&nbsp;&nbsp; 5000cps/60CPR = 83.3 max revolutions per second (rps)  


&nbsp;&nbsp;&nbsp;&nbsp; circumference of mouse ball = 0.875"
&nbsp;&nbsp;&nbsp;&nbsp; circumference of mouse ball = 0.875"  


&nbsp;&nbsp;&nbsp;&nbsp; 83.3rps X 0.875" = 72.9 inches per second (ips)
&nbsp;&nbsp;&nbsp;&nbsp; 83.3rps X 0.875" = 72.9 inches per second (ips)  


&nbsp;&nbsp;&nbsp;&nbsp; 72.9ips/12 = 6.07 feet per second (fps) = maximum detectable linear ground speed
&nbsp;&nbsp;&nbsp;&nbsp; 72.9ips/12 = 6.07 feet per second (fps) = maximum detectable linear ground speed  
 
&nbsp;&nbsp;&nbsp;&nbsp; 6.07fps = 4.1 miles per hour (just in case you were curious)


&nbsp;&nbsp;&nbsp;&nbsp; 6.07fps = 4.1 miles per hour (just in case you were curious)


<br>


<u>PS/2 Ball Mouse -</u>  
<u>PS/2 Ball Mouse -</u>  


<u>USB Optical Mouse -</u>
<u>USB Optical Mouse -</u>

Revision as of 12:20, 24 January 2009

USB Ball Mouse -

power from PC to mouse is +5vdc.

Pulse Rate = 5 micro second (top two lines)

Long Pulse--->Long Pulse = 200 micro seconds (bottom length)

Image:Pulse lengths

Dell ball mouse pulse protocal.JPG


1/200uS = 5000cycles/sec - - - this is the maximum detectable rate

sensor wheel = 60 counts per revolution (CPR)

Calculate maximum detectable ground speed:

     5000cps/60CPR = 83.3 max revolutions per second (rps)

     circumference of mouse ball = 0.875"

     83.3rps X 0.875" = 72.9 inches per second (ips)

     72.9ips/12 = 6.07 feet per second (fps) = maximum detectable linear ground speed

     6.07fps = 4.1 miles per hour (just in case you were curious)


PS/2 Ball Mouse -

USB Optical Mouse -