Digital Speedometer D.I.Y

[spenx75]

see my point is, if the rolling circumfrance was something absolute like the length around the whole wheel, wouldnt you have to place the sensors at absolute points too? so for those who placeed it on their disc brakes, which distance or circumfrance did you measure?

 

It actually does not matter as long as you get the rolling circum right. Say u enter the whole wheel circum as XYZmm, so no matter where u place the magnet, 1 pass/flux on the sensor is XYZmm right?

 

Found this on the trailtech webby. . . very accurate if you know the road distance.

http://i17.photobucket.com/albums/b54/Spenx75/trailtech.jpg?t=1185088308

[Limsteel]

see my point is, if the rolling circumfrance was something absolute like the length around the whole wheel, wouldnt you have to place the sensors at absolute points too? so for those who placeed it on their disc brakes, which distance or circumfrance did you measure?

 

The Sensor is not measuring length... it is measuring signals. You see, no matter where the magnet is placed on the wheel. it will take the same time to complete full rev which the sensor will pickup. counting these pulses in a define time, the sensor will be able feedback the speed.

 

Do remember to read the specs carefully when buying these Cyclometer, most can't measure speeds above 100km/hrs. only a handful can is capable.

[ahsnow]

I have seen one of these displays fitted on a yamaha TZR 125 OMG!!!!! http://trailtech.net/computers.html

[mitosis]

if u see my badly done picture, if u calculate the rolling circumfrance? the magnet placed at 2 points on the spoke will cross the sensor a different number of times in 1 full rotation of the wheel.

thats what i dont understand >.

[mitosis]

picture, quality abit lousy

wheel.bmp

[Demon]

if u see my badly done picture, if u calculate the rolling circumfrance? the magnet placed at 2 points on the spoke will cross the sensor a different number of times in 1 full rotation of the wheel.

thats what i dont understand >.

 

It wouldn't. On your example, two magnets, each on a different position on the same spoke, they will cross the sensor exactly the same time, at the same number of rotation.

 

I thought your diagram is quite clear.

[johndoe]

any kind soul to help me fix a cateye velo 5 on my sp?? i dont mind going over and paying for yr service. pm me. thanks!

[TripleOneZero]

Hope tis link could help u guess in calcularing ur circumference for the bicycle speedo setting...

 

http://www.powerdog.com/tiresize.cgi

[quizesilver]

dear

all velo 8 user.

i used it before

pls go into the setting and see again

there is those preset and those that allow you to set your setting by the cm.

 

to set the setting,

do a marking on the tire or take the air valve as the mark

then do a mark on the floor.

then roll it until the valve touch the floor again, measure the distance again. for 3 time to get the average and that will be the measurement to input.

 

also u may buy the stronger and thicker wire to use, avaliable for cateye.

check with the more "brand" shop they will have it. also the wire is call heavy duty wire it come with the mount for the meter too.

[logen1836]

any kind soul to help me fix a cateye velo 5 on my sp?? i dont mind going over and paying for yr service. pm me. thanks!

 

me too!

[quizesilver]

nt sure any one interested

http://cgi.ebay.com/Trailtech-Vapor-KTM-525-XC_W0QQitemZ220186805801QQihZ012QQcategoryZ43976QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem

 

currently sg is selling for 299

but i am thinking of getting in and diy. buying and shipping abt 180+sgd

[adesmond2]

wow... so hard ar? To DIY Fix speedo meter on our bike need to measure this and that?? not just fix the item on our handle and wau la.. we are ready to go??

[Shadowles]

nt sure any one interested

http://cgi.ebay.com/Trailtech-Vapor-KTM-525-XC_W0QQitemZ220186805801QQihZ012QQcategoryZ43976QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem

 

currently sg is selling for 299

but i am thinking of getting in and diy. buying and shipping abt 180+sgd

 

wow count me in!

[quizesilver]

going to get mine soon

[kmax]

i found this in some forums... looks nice .. cost around £164.50

 

http://img441.imageshack.us/img441/8530/shootingshowyomoto216yv1.jpg

 

http://www.acewell-meter.co.uk/en_uk/motorcycle/index.htm