2009:Mouse details: Difference between revisions
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Pulse Rate = 5 micro second (top two lines) | Pulse Rate = 5 micro second (top two lines) | ||
Long Pulse--->Long Pulse = 200 micro seconds (bottom length)<br> | Long Pulse--->Long Pulse = 200 micro seconds (bottom length)<br> | ||
Image:Pulse lengths | Image:Pulse lengths | ||
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<br> | <br> | ||
60 CPR | 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) | |||
<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 10:45, 24 January 2009
USB Ball Mouse -
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 -
