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data acquisition options

Old 11-15-2012, 12:26 PM
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I was using a BadElf external GPS, set to 10hz. I believe the .5 to .6g readings I was getting to be accurate - those tires were hardened up.

When HLT worked for me it was fine. But sometimes the display would exit back to the home screen, resulting in no in-car feedback, and a couple of times it stopped recording the session altogether. I suppose it's possible the 10hz gps rate combined with the other activity was swamping the phone; it's a 3gs, so dual core, but not as fast as a 4/4s.
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Old 11-17-2012, 12:13 AM
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Originally Posted by emilio700 View Post
Not much value in anything past 720/30 if you are posting on YT, IMO. Even with YT's compression, the files still look great. Even better on Vimeo where you can upload an uncompressed 720/30 MP4 off a gopro.

Bigger files than that get big in a hurry. We chose 720/30 because it allows us to record an entire 4hr enduro in HD on one 32GB card and battery bac on our Hero2's.

1080p/60fps looks awesome on my TV at home but I just about never view them that way nor does anyone else.
+1

GoPro pretty much owns the video-only market, and you still need to turn it on. There are now data acquisition units that sync with the GoPro, although I don't know if they turn the GoPro units on and off automatically or not. That alone is a feature that you don't know you NEED until you're trapped in a harness.
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Old 11-17-2012, 02:45 PM
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I velcroed a GoPro WiFi remote to my dashboard. Turn the Wifi remote on before you strap in, then turn the camera on with a couple button touches when you roll onto the track.

I would kill for a GoPro backpack that turned the camera on every time my IQ3 was recording, though.
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 11-17-2012, 03:01 PM
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I read a post from a member who had his GoPro (IIRC) powered by a USB cable on toggle that turned the camera on and started recording when the power came on.
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Old 11-17-2012, 06:07 PM
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Originally Posted by Savington View Post
I velcroed a GoPro WiFi remote to my dashboard. Turn the Wifi remote on before you strap in, then turn the camera on with a couple button touches when you roll onto the track.

I would kill for a GoPro backpack that turned the camera on every time my IQ3 was recording, though.
Don't kill me! I've got a solution, but it requires a tethered cord to your GoPro.
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Old 11-19-2012, 07:47 PM
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Originally Posted by cordycord View Post
Don't kill me! I've got a solution, but it requires a tethered cord to your GoPro.
PM me. I've already got a USB charger so running wires to the camera is fine by me (so long as they can be unplugged).
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 11-19-2012, 09:20 PM
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Originally Posted by Savington View Post
PM me. I've already got a USB charger so running wires to the camera is fine by me (so long as they can be unplugged).
I've often wondered if I could dremel a hole in my gopro case and power it from a usb cable to the dc outlet. Is that how you do it?
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Old 11-19-2012, 09:46 PM
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Originally Posted by shanem View Post
I've often wondered if I could dremel a hole in my gopro case and power it from a usb cable to the dc outlet. Is that how you do it?
That's exactly how I do it. I did shell out for the GoPro cig lighter to USB adapter, since the cameras are picky about how much amperage they need to record and charge at the same time and I didn't want to hassle with it. Picked up a 15ft USB cord on Amazon, drilled a hole in the side of the case, and plugged it all in. Works like a charm.
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 11-19-2012, 09:51 PM
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Default Go Pro wired remote

You could order all the parts and then spend a few tedious hours soldering them in (like I did), or you could just get it from this guy...

Cam do Remote Control for GoPro HD Hero and Hero 2 Cameras | eBay
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Old 11-19-2012, 10:00 PM
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Originally Posted by cordycord View Post
You could order all the parts and then spend a few tedious hours soldering them in (like I did), or you could just get it from this guy...

Cam do Remote Control for GoPro HD Hero and Hero 2 Cameras | eBay
That's basically what I have now, except it's wireless (WiFi Backpack w/ remote velcroed to the dash) and doubles as my race timer (start the camera when the pace car's lights go out) for enduros. I can also take the remote out of the car so I can start the camera when other people are driving it.

What I want is something that will automatically start the camera when my IQ3 is recording - totally automated and brainless (just like me).
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 11-19-2012, 10:06 PM
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My plan is to use the external warning trigger for the same setting as enabling record (25mph?) on the IQ3 to set off a latching relay to trigger my replayxd. The replayxd is sitting on my monitor look at me right now which tells you how far I've gotten with that plan...
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Old 11-19-2012, 10:11 PM
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Note to everyone here:
5hz GPS is great if you are a ------. My 10hz numbers are just as accurate as the official timing and give better data rather than lines telling you when you turn the wheel and when you touch the pedals. I tried to make a 5hz work, and it was okay, but left me wanting more.
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Old 11-19-2012, 10:21 PM
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Default New data acquisition system

I'm building a new data acquisition unit now that can use a tether to control a GoPro based on speed or movement. And much more, including CAN inputs and even Lin pot inputs. Interesting?
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Old 11-20-2012, 12:56 AM
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Originally Posted by hustler View Post
Note to everyone here:
5hz GPS is great if you are a ------. My 10hz numbers are just as accurate as the official timing and give better data rather than lines telling you when you turn the wheel and when you touch the pedals. I tried to make a 5hz work, and it was okay, but left me wanting more.
Which 10hz are you running? I only used my 5hz for one weekend at the end of the season but I thought it was 'da chit compared to the onboard iphone 1hz...
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Old 11-20-2012, 02:20 AM
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Originally Posted by mr_hyde View Post
which 10hz are you running? I only used my 5hz for one weekend at the end of the season but i thought it was 'da chit compared to the onboard iphone 1hz...
g2x It matches the official timing to the hundredth, lol.
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Old 11-20-2012, 09:44 AM
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Originally Posted by mr_hyde View Post
Which 10hz are you running? I only used my 5hz for one weekend at the end of the season but I thought it was 'da chit compared to the onboard iphone 1hz...
Yes, what 10Hz, a lot of 10Hz receivers are just 5Hz receivers with interpolation.
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Old 11-20-2012, 04:53 PM
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Originally Posted by Leafy View Post
Yes, what 10Hz, a lot of 10Hz receivers are just 5Hz receivers with interpolation.
Yup.

Racepak G2X and IQ3 are 10hz receiver with g sensor interpolation thus they market it as 20hz effective.
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Old 11-20-2012, 08:03 PM
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Originally Posted by Savington View Post
What I want is something that will automatically start the camera when my IQ3 is recording - totally automated and brainless (just like me).
it is called Traqmate + Gopro. it automatically starts recording when Traqmate starts.

for my other car with G2X and Gopro. I use the new Gopro iphone app. you can start/stop/change setting recording using your iphone AND you can watch whatever your gopro sees on your iphone screen. with 3 seconds delay.... great for aiming gopro
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Old 11-20-2012, 10:17 PM
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Originally Posted by bellwilliam View Post
it is called Traqmate + Gopro. it automatically starts recording when Traqmate starts.

for my other car with G2X and Gopro. I use the new Gopro iphone app. you can start/stop/change setting recording using your iphone AND you can watch whatever your gopro sees on your iphone screen. with 3 seconds delay.... great for aiming gopro
I started using the wi-fi and remote on my Hero2. Velcro the remote on the doorbar, handy.
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Old 11-29-2012, 06:47 AM
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Default Don't die thread...

Okay, everyone seems to like 10Hz for GPS. Is anyone looking at linear potentiometer readings for suspension? Lean angle? Throttle position? Does anyone use any systems with predictive lap times?
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