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Old 01-27-2014, 06:47 AM   #1651
Oreh
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Recently, I bought same lap timer:
http://www.ebay.com/itm/lap-timer-be...bb1bea&vxp=mtr

I have problem with GP8 timing, because beacon is on different side of bike at start then at the end.
I can measure time of each lap, but can not measure whole GP8 course.

Does anyone have experience of how to set a beacon and reciver that will detect the measurements from both sides?
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Old 01-27-2014, 06:54 AM   #1652
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Originally Posted by Oreh View Post
Does anyone have experience of how to set a beacon and reciver that will detect the measurements from both sides?
I guess you will need a second transmitter box, so if you start with one transmitter on your right at the start, a second one to be placed on your right at the finish cones.
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Old 01-27-2014, 07:14 AM   #1653
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A couple of our riders use those lap timer devices that have a trackside beacon and they use two beacons so that the receiver gets a hit no matter which way the bike is pointing.

The only trouble is that they are a bit coarse and so may not be all that accurate. I did write to our friends in Japan to see if any of them knew a way of modifying a stopwatch to accept a start/stop signal from an i/r gate. It seems that they use the sensors from garage door systems and then do some magic with the electronics in the watch itself. So far nobody has been able to point me in the direction of a wiring diagram that shows how this is done.
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Old 01-27-2014, 12:27 PM   #1654
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Originally Posted by Motogymkhanaman View Post
A couple of our riders use those lap timer devices that have a trackside beacon and they use two beacons so that the receiver gets a hit no matter which way the bike is pointing.

The only trouble is that they are a bit coarse and so may not be all that accurate. I did write to our friends in Japan to see if any of them knew a way of modifying a stopwatch to accept a start/stop signal from an i/r gate. It seems that they use the sensors from garage door systems and then do some magic with the electronics in the watch itself. So far nobody has been able to point me in the direction of a wiring diagram that shows how this is done.
The timer itself is pretty accurate, and holds a lot of laps to scroll through. However the triggering system is a bit cumbersome to set-up and sometimes doesn't pick up the signal, or can pick up some other infrared light source and start/stop your timer in the middle of the lap. I found it works for me about 90% of the time, and when it doesn't, it usually just needs a readjusting on the bike, or old batteries in the beacons.


As far as using this timer for GP8, yes, you need two beacons, set up on both sides of the start/finish line.

Those beacons are nothing more but an infrared light bulb. You can probably just get it at Radio Shack and strap it to a battery.
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Old 01-28-2014, 03:42 AM   #1655
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With regard to quick & easy timing systems, I have found something that I think will do the trick.

I have written to the organisers of the event that this kit was built for to try and track down the designer. If I can persuade him to reveal his parts list and a wiring diagram then I will post it up ASAP.

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Old 01-28-2014, 09:04 AM   #1656
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This might have gotten lost, as it was the last post on the previous page, and might have gotten skipped over as the page turned, but this link has instructions and wiring diagrams for exactly what you guys are looking for.

As I said, the only reason I haven't built this, is that I never had any experience with assembling electronics.

I tried to outsource this to a few people I knew, but it never got off the ground.

Here is the link:

http://www.instructables.com/id/Laser-Sensor-Timer/
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Old 01-29-2014, 09:30 AM   #1657
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Originally Posted by Vulfy View Post
This might have gotten lost, as it was the last post on the previous page, and might have gotten skipped over as the page turned, but this link has instructions and wiring diagrams for exactly what you guys are looking for.

As I said, the only reason I haven't built this, is that I never had any experience with assembling electronics.

I tried to outsource this to a few people I knew, but it never got off the ground.

Here is the link:

http://www.instructables.com/id/Laser-Sensor-Timer/
Not that this will help much since they are cheap, but I have a bunch of cheapo stopwatches if anyone wants to try this I can send or meet up to give one or two to someone.
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Old 01-30-2014, 09:51 AM   #1658
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A variation on the Moto Gymkhana theme is Duel-Attack, a bit like drag racing only with a high degree of bike control involved. This video is of our group in Vietnam just having fun by running it as a team event.

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Old 01-30-2014, 12:21 PM   #1659
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Originally Posted by Motogymkhanaman View Post
A variation on the Moto Gymkhana theme is Duel-Attack, a bit like drag racing only with a high degree of bike control involved. This video is of our group in Vietnam just having fun by running it as a team event.


I really like this idea. As much as time attacks are, a head to head competition is a good change of pace. We are definitely doing something similar this summer.
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Old 02-01-2014, 05:25 AM   #1660
pterus
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this other photoelectric switch timer system looks simpler to make: http://translate.googleusercontent.c...GwPpjhuUsA7W4Q
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Old 02-02-2014, 02:02 PM   #1661
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Good practice session today. Vulfy, YamahaRN - any chance you guys have pictures from today?
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Old 02-02-2014, 05:14 PM   #1662
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It had been a long time since I did any gymkhana, but I made some time to get out today.

I took this fat girl for a dance:
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Old 02-03-2014, 01:46 AM   #1663
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Good practice session today. Vulfy, YamahaRN - any chance you guys have pictures from today?
I put the ones I have on the fb page.
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Old 02-03-2014, 04:40 AM   #1664
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I put the ones I have on the fb page.
Thanks!
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Old 02-03-2014, 05:28 AM   #1665
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I put the ones I have on the fb page.
how about putting it here, so three days from now when Facebook changes something we'll still have access , please?
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