2009:Mouse details: Difference between revisions

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

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 -

@@ Line 1: / Line 1: @@
 <u>USB Ball Mouse</u> -
+power from PC to mouse is +5vdc.
 Pulse Rate = 5 micro second (top two lines)
@@ Line 11: / Line 13: @@
 <br>
 /200uS = 5000cycles/sec - - - this is the maximum detectable rate
 sensor wheel = 60 counts per revolution (CPR)
 Calculate maximum detectable ground speed:
 &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; 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; 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>USB Optical Mouse -</u>