Cool iPhone App

[derby]

Seems odd that it has 3 accelerometers... perhaps that's default for the chips.

Don't see why it would need three, but I don't have one, so no idea what other apps could possibly use three.
Does it have games that would use  accelerometers or a pedometer function?

so the phone can determine it's orientation. among other things, this is how it does the automatic switch from portrait to landscape.

here is the datasheet for the chip being used.

and here is the tip of the iceberg as to what you can do with them:

[MetalDuc]

Seems odd that it has 3 accelerometers... perhaps that's default for the chips.

Don't see why it would need three, but I don't have one, so no idea what other apps could possibly use three.
Does it have games that would use  accelerometers or a pedometer function?

Yup, that is just the way the chips come. The iPhone being basically a computer there are now just about any apps you can imagine. Games, pedometers, dynamometers and others which make use of the phones features. It is nice to have a phone that is such an open platform even if Apple does get in the way of third party apps and mods more often than not.

[DucFanatic]

wow, i am so out of the iphone loop...

[Speeddog]

wow, i am so out of the iphone loop...

Don't feel bad, if the topic hadn't come around to accelerometers, I woulda had nothing.

[lucazuma]

nick, i would think it has 3 to be able to follow all 3 axes...

...so apparently it works :

http://www.youtube.com/watch?v=0-DFbJQbeSY&eurl=http://gizmodo.com/

[Rob Hilding]

You have to have 3 axles ??



All my vehicles only have two











 

[madmatt]

nick, i would think it has 3 to be able to follow all 3 axes...

http://www.youtube.com/watch?v=0-DFbJQbeSY&eurl=http://gizmodo.com/

I think he meant, axe you 3 questions...

[darylbowden]

I think he meant, axe you 3 questions...

Nah, I think he was talking about that body spray for guys that read Maxim.


Honestly, I can't tell you how shocked I am that Luca spelled the plural form of axis correctly.  Bravo sir 

[lucazuma]

 

[DucFanatic]

what a fantastically warm and IZ_ feeling knowing i have a gaggle of nerds at my disposal! 

[madmatt]

Speaking of nerds - i noticed something. A little detail that Garage 419 failed to note - reaction time. This really effs up a key point they were making about the 1/4 miles times. Overlooking reaction time causes a discrepancy between the ACTUAL time it takes when you begin moving and ultimately cross the finish line vs. how long it takes from the time the light turns green to then crossing the finish line. See where I'm going with this?

When they showed the drag time slip, the R/T on was .926, that means the car left the line .426 seconds after the green (if you don't understand that, read up on R/Ts). The clock (that ultimately timed them at 15.614) starts ticking at the green. Ruh roh...problems.

Homie threw the gtech pro on the ground and stomped on it because it was almost a half second off the slip time...however he was way quick to do that. The gtech read 15.16. When you add the .426 seconds sitting at the line (while the clock is ticking)...the time is TADA...pretty fuggin accurate (15.58).   The iPhone reported 15.64 --- which as they played it was OMG!!! .01 off of the slip time --- however, when you add .426, the iPhone is the one a 1/2 second off and the gtech pro becomes the winner of 1/4 mile drag time.

Needless to say, the $13 app is cool, and a great measure of relative performance (when comparing to another dynolicious result). And from what they say about the functionality of the gtech and the $150 price tag, I'm in even more support of the dynolicious. But, Garage 419 went way out of their way to prove the point, the wrong way.

Nuff said.

[MetalDuc]

Speaking of nerds - i noticed something. A little detail that Garage 419 failed to note - reaction time. This really effs up a key point they were making about the 1/4 miles times. Overlooking reaction time causes a discrepancy between the ACTUAL time it takes when you begin moving and ultimately cross the finish line vs. how long it takes from the time the light turns green to then crossing the finish line. See where I'm going with this?

When they showed the drag time slip, the R/T on was .926, that means the car left the line .426 seconds after the green (if you don't understand that, read up on R/Ts). The clock (that ultimately timed them at 15.614) starts ticking at the green. Ruh roh...problems.

Homie threw the gtech pro on the ground and stomped on it because it was almost a half second off the slip time...however he was way quick to do that. The gtech read 15.16. When you add the .426 seconds sitting at the line (while the clock is ticking)...the time is TADA...pretty fuggin accurate (15.58).   The iPhone reported 15.64 --- which as they played it was OMG!!! .01 off of the slip time --- however, when you add .426, the iPhone is the one a 1/2 second off and the gtech pro becomes the winner of 1/4 mile drag time.

Needless to say, the $13 app is cool, and a great measure of relative performance (when comparing to another dynolicious result). And from what they say about the functionality of the gtech and the $150 price tag, I'm in even more support of the dynolicious. But, Garage 419 went way out of their way to prove the point, the wrong way.

Nuff said.

[supafly]

Speaking of nerds - i noticed something. A little detail that Garage 419 failed to note - reaction time. This really effs up a key point they were making about the 1/4 miles times. Overlooking reaction time causes a discrepancy between the ACTUAL time it takes when you begin moving and ultimately cross the finish line vs. how long it takes from the time the light turns green to then crossing the finish line. See where I'm going with this?

When they showed the drag time slip, the R/T on was .926, that means the car left the line .426 seconds after the green (if you don't understand that, read up on R/Ts). The clock (that ultimately timed them at 15.614) starts ticking at the green. Ruh roh...problems.

Homie threw the gtech pro on the ground and stomped on it because it was almost a half second off the slip time...however he was way quick to do that. The gtech read 15.16. When you add the .426 seconds sitting at the line (while the clock is ticking)...the time is TADA...pretty fuggin accurate (15.58).   The iPhone reported 15.64 --- which as they played it was OMG!!! .01 off of the slip time --- however, when you add .426, the iPhone is the one a 1/2 second off and the gtech pro becomes the winner of 1/4 mile drag time.

Needless to say, the $13 app is cool, and a great measure of relative performance (when comparing to another dynolicious result). And from what they say about the functionality of the gtech and the $150 price tag, I'm in even more support of the dynolicious. But, Garage 419 went way out of their way to prove the point, the wrong way.

Nuff said.

"Two Separate performances are monitored for each run: elapsed time and speed. Upon leaving the staging beams, each vehicle activates an elapsed-time clock, which is stopped when that vehicle reaches the finish line. The start-to-finish clocking is the vehicle's elapsed time (e.t.), which serves to measure performance. Speed is measured in a 66-foot "speed trap" that ends at the finish line. Each lane is timed independently."
http://www.nhra.com/basics/basics.html


Your ET has nothing to do with your RT. The clock starts when you leave the staging beams. It only matters when race heads up (the first to the finish line wins).

And how would the gtech know when the light turned green?

[MetalDuc]

"Two Separate performances are monitored for each run: elapsed time and speed. Upon leaving the staging beams, each vehicle activates an elapsed-time clock, which is stopped when that vehicle reaches the finish line. The start-to-finish clocking is the vehicle's elapsed time (e.t.), which serves to measure performance. Speed is measured in a 66-foot "speed trap" that ends at the finish line. Each lane is timed independently."
http://www.nhra.com/basics/basics.html


Your ET has nothing to do with your RT. The clock starts when you leave the staging beams. It only matters when race heads up (the first to the finish line wins).

And how would the gtech know when the light turned green?

Good points. I would say the answer is in between but closer to the longer times Matt has stated. Because the iPhone and G-Tech both start the clock as soon as the accelerometers detect a g-load (i.e. as soon as the car starts to roll). The et doesn't start untilt the staging beam (of which there are usually 2) is broken . I haven't watched the video closely enough to see if 419 deepstages but assuming he does not that means the car starts rolling a bit before the time starts.

Thecar tire has to clear the second beam before time starts. Assuming a 12" width (I think that is the standard used) of tire where it crosses beam the car will already have traveled 12" before the et clock starts. So the accelerometers should have a slightly longer total time than the et of the track.

[madmatt]

"Two Separate performances are monitored for each run: elapsed time and speed. Upon leaving the staging beams, each vehicle activates an elapsed-time clock, which is stopped when that vehicle reaches the finish line. The start-to-finish clocking is the vehicle's elapsed time (e.t.), which serves to measure performance. Speed is measured in a 66-foot "speed trap" that ends at the finish line. Each lane is timed independently."
http://www.nhra.com/basics/basics.html


Your ET has nothing to do with your RT. The clock starts when you leave the staging beams. It only matters when race heads up (the first to the finish line wins).

And how would the gtech know when the light turned green?

I came across this detail after posting and y'all beat me to my correction. So, I stand corrected.