Lap timing

[supernatural]

this is very interesting... using the phone as a lap timer... but my question is before i blow $99US on the external bluetooth is... does it actually work?? how accurate is it?? anyone here have got one?? comment??

[fueltank]

Is this a 1hz or 5hz?
http://www.holux.com/JCore/en/produc...ec.jsp?pno=222

That's what I have now

[Jingers]

this is very interesting... using the phone as a lap timer... but my question is before i blow $99US on the external bluetooth is... does it actually work?? how accurate is it?? anyone here have got one?? comment??

yeah i have switched to using this software on my nokia N95 with a 5Hz GPS unit. Accuracy is better than 0.1sec. does sectors and its great cos it shows your speed at all points on the track and lets you compare laps against each other. Better than just knowing what your lap time was... imo. i will post some screen shots from my phone once i get taking screen shots working... :/

..

[00dc2]

I have not gone through the process of validating it against the infra red lap timer used by many.. i might this weekend if szy lends me his. but at the last track day the instructors did hand timing for their own records. Their times and my phone times were within 0.1s. I know that isnt saying much as its compared to hand timing but still.. its something.

Also my best lap is on youtube http://youtube.com/watch?v=MRuPQvTjL6w and you can see if you watch the video that the 1'28.2 timed by the phone is reasonably accurate.

I dont have any proof of how accurate it is. But it seems quite accurate.

[00dc2]

Is this a 1hz or 5hz?
http://www.holux.com/JCore/en/produc...ec.jsp?pno=222

That's what I have now

doesnt seem to say.. but i'd guess 1hz. as in the format section it says it gives the various values once per second...

here is a guy from OZ showing how the racechrono goes against the official timing at wakefield park. He gets pretty good results with just a 1Hz GPS receiver.

http://www.racechrono.com/forum/comm...&page=1#Item_0

[supernatural]

thx jing... rofl... i missed tat part for some reason... 00dc2... would u recommend getting the 1hz or 5hz bluetooth??

cos the 2 guys that did a comparison on the link u provided is using 1hz and its close to the "actual" time...

[00dc2]

personally i went for 5hz cos its better and the price difference from 1hz is small... it also provides more sampling points for comparing laps.

On the site it says 1hz gives plus minus 0.2 accuracy.. and 5hz gives plus minus under 0.1... so i went with 5hz.

[supernatural]

cool... thx...

wat other stuff should i be looking for apart from the 5hz refresh rate...

found one on ebay and its 5hz... and cheap too...

http://cgi.ebay.com.au/New-51-Channe...QQcmdZViewItem

[00dc2]

wow that is cheap.. and it says 5Hz... maybe ask the seller to confirm it does 5Hz.. so say 5Hz then have a * saying (optional).. which means its an option at the factory and if you dont get the right one then its just 1Hz...

but that one you found looks ok...

[supernatural]

cool!!! cheers d00d... ill give the seller a PM and ill see how it goes... if everything goes well then ill make the purchase...

btw... its free to use the GPS yeah?? as in for lap timing...

[00dc2]

yeah... gps is free..
the only possible cost might be if the guy who writes the racachrono software sometime down the line decides to start charging for it.. but i dont see that coming anytime soon.. and i dont see it costing much when it does...

[freakygeek]

Just found this for Windows Mobile PPC's -

http://freecabs.org/download.php?view.129

Going to have a play with it tonight... yeah, the software that is...

[Wlee2]

is there a way to make a tom tom do laptimes =P..

[fueltank]

Just found this for Windows Mobile PPC's -

http://freecabs.org/download.php?view.129

Going to have a play with it tonight... yeah, the software that is...

Would that work on WinCE?

[freakygeek]

Would that work on WinCE?

Pretty sure it won't.. no.

Hmmm, what device do you run CE on?