2009:Mouse details: Difference between revisions

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(New page: <u>USB Ball Mouse</u> - Pulse Rate = 5 micro seconds Long Pulse--->Long Pulse = 200 micro seconds Image:Pulse lengths 60 CPR, 5000 CPS <u>PS/2 Ball Mouse -</u> <u>USB Optical ...)
 
 
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<u>USB Ball Mouse</u> -
<u>USB Ball Mouse</u> -  


Pulse Rate = 5 micro seconds
power from PC to mouse is +5vdc.


Long Pulse---&gt;Long Pulse = 200 micro seconds
Pulse Rate = 5 micro second (top two lines)


[[Image:Pulse lengths]]
Long Pulse---&gt;Long Pulse = 200 micro seconds (bottom length)<br>


60 CPR, 5000 CPS
Image:Pulse lengths


<u>PS/2 Ball Mouse -</u>
[[Image:Dell ball mouse pulse protocal.JPG]]
 
<br>
 
1/200uS = 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; <span style="color: rgb(255, 0, 0);">diameter</span> of mouse ball = 0.875"
 
&nbsp;&nbsp;&nbsp;&nbsp; circumference of mouse ball&nbsp; = Pi *&nbsp;d = 2.7489" circumference
 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color: rgb(255, 0, 0);">measured counts per foot on current mouse on robot - 1210, or ~100 counts per inch</span>
 
&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)
 
<br>
 
It appears the phototransistor may be an "EverLight" Device...&nbsp; Check out something "[http://www.everlight.com/upload/product_pdf/PT2559B-L2-F_1789.pdf similar]".
 
<br>
 
<u>PS/2 Ball Mouse -</u>  


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

Latest revision as of 20:32, 30 December 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)

     diameter of mouse ball = 0.875"

     circumference of mouse ball  = Pi * d = 2.7489" circumference

                 measured counts per foot on current mouse on robot - 1210, or ~100 counts per inch

     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)


It appears the phototransistor may be an "EverLight" Device...  Check out something "similar".


PS/2 Ball Mouse -

USB Optical Mouse -