PC-GPS Lap timers?

Anyone ever used this:
http://www.softbuz.com/mobile/travel/gps/screenshots/harry-s-gps-laptimer-professional/

or have an alternative I should check out? Linux compatibility a must.

That's a PalmOS app.

Seems like there's little to no free software out there to do it. Here's a project meant to run on a microcontroller board, the code could be ported:

https://www.assembla.com/code/ironlung/subversion/nodes/trunk/LapTimer/README

There's a commercial app called Dashdaq that will do everything you want...for like 1/4 of a Challenge budget...

Ow. Looking for 0-$100 budget, leaning toward $0 as strong preference.

looks like the dashdaq is a complete product, the software alone is not available? I want software I can load into an existing Linux based carputer.

Can you emulate Android? Then run trackmaster by trackaroo. i use it on my android phone, and connect to a blue tooth standalone gps and I'm happy with it.

Whoops, yeah it looks like the Dashdaq is only available as a complete product. Adapting that LapTimer software above looks like your best bet. One of those things I'd do if I had the time...

Maybe this: http://laptimer.sourceforge.net/index.html ??

If you don't need real-time, in car... then you can log NMEA messages from your GPS and parse/calculate times in a spreadsheet app.

What happened to just taping the stopwatch to the dash? What I use to do. It would record somthing like 25 laps to memory. Then you use this thing called pencil and paper and write them down. Ok my age is showing.

A very simple yet complicated approach is just carry around a hotspot in the car and connect to the Chumpcar live timing system via web browser (when it works)

sporqster wrote: Maybe this: http://laptimer.sourceforge.net/index.html ??

Oooh nice find.

The transponder system that ChumpCar uses has the ability to interface with an add-on product that will display the lap times. I think you have to buy the transponder yourself and the display unit.

I believe the transponder works on a specific radio frequency, if you could detect this and monitor it, then you could build something that picks the pulse up and registers it.

BTW, if you're looking for a cheap way to build an in-car PC:

http://www.ebay.com/itm/310401413342?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

I bought one on a lark and asked for the add-on GPS and modem (free for the asking). The GPS unit and cellular modem are on an add-on board that is connected to the motherboard via the onboard serial connector and the USB connector and power. Doing some research, the GPS unit is accurate to 1hz, is an industry standard unit (can't remember which one right now), just add a couple of antennae and a SIM card. Talking to the seller, they have about 100 of the boards in their warehouse.

FYI on the AMB transponder:

http://www.electro-tech-online.com/general-electronics-chat/41704-timing-transponders-how-do-they-work.html

Found this as well:

http://www.appbrain.com/app/racemon/com.tdr.racemon

For Android, but you might be able to run it within Linux with some work (on a more recent distro).

In reply to turboswede: Interesting... Already have PC in the car, running lubuntu and using it to display the tunerstudio dashboard.

Also have a wired in AMB 260 transponder... soOoOo I'm just looking for something that will detect the timing loop pulse?

http://www.racerpartswholesale.com/product/282/AMB_DisplayIT_In_Car_Display ouch you is so expensive.