[PRODUCT] Pocket DYNO
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Le Mans Master
Joined: Apr 2000
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From: Motor City Vettes Ringleader
SE Michigan Coordinator
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Le Mans Master
Joined: Apr 1999
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From: Vette
Re: [PRODUCT] Pocket DYNO (jeffh355)
Wow! Way C:cool::cool:L!
Looks like it got much better features than G-Tech.
Only wish it would work with laptops as well!
[Modified by EuG, 2:57 PM 7/19/2002]
Looks like it got much better features than G-Tech.
Only wish it would work with laptops as well!
[Modified by EuG, 2:57 PM 7/19/2002]
Drifting
Joined: Feb 2000
Posts: 1,922
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From: Boulder, Colorado
Re: [PRODUCT] Pocket DYNO (y2k02c5)
That is a cool product at a good price.
I wonder if they have 3 orthogonal accelerometers, since they don't say it has to be leveled perfectly? If you have two only, the thing has to be level or the effects of gravity cannot be taken out.
Here's a two-axis accelerometer that's pretty cheap: http://shop.store.yahoo.com/crossbow/adxl202eb232.html
It doesn't come with software (you've got to write your own), and it isn't in an enclosure. It's got an RS232 serial cable, so it'll hook up to a laptop (or maybe some handhelds?). I'll probably throw together some software to use it for time-to-speed and time-to-distance recording, but it'd be under Linux not MS windows.
I bought it to use for a navigation system I built, but ended up not using it since I couldn't find cheap enough gyros for accurate attitude information. It's been sitting in a box for a few months.
I wonder if they have 3 orthogonal accelerometers, since they don't say it has to be leveled perfectly? If you have two only, the thing has to be level or the effects of gravity cannot be taken out.
Here's a two-axis accelerometer that's pretty cheap: http://shop.store.yahoo.com/crossbow/adxl202eb232.html
It doesn't come with software (you've got to write your own), and it isn't in an enclosure. It's got an RS232 serial cable, so it'll hook up to a laptop (or maybe some handhelds?). I'll probably throw together some software to use it for time-to-speed and time-to-distance recording, but it'd be under Linux not MS windows.
I bought it to use for a navigation system I built, but ended up not using it since I couldn't find cheap enough gyros for accurate attitude information. It's been sitting in a box for a few months.
Instructor
Joined: Sep 2001
Posts: 122
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From: Anderson IN
Re: [PRODUCT] Pocket DYNO (Miles in Michigan)
I wonder if they have 3 orthogonal accelerometers, since they don't say it has to be leveled perfectly? If you have two only, the thing has to be level or the effects of gravity cannot be taken out.
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Drifting
Joined: Feb 2000
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From: Boulder, Colorado
Re: [PRODUCT] Pocket DYNO (Miles in Michigan)
I wonder if they have 3 orthogonal accelerometers, since they don't say it has to be leveled perfectly? If you have two only, the thing has to be level or the effects of gravity cannot be taken out.
Actually, if it's not level, it could detect during initialization any perceived acceleration while stopped, and determine the deflection from verticle. For example if it detects 0.7g along the forward axis and 0g on the lateral axis, then it knows it is mounted at 45 degrees facing forward, and level horizontally (assuming a level road). Then if the forward axis changes to 0.8g, you'd take (0.8-0.7)/cos(45)=0.1414g, and get the forward acceleration component. You still can't mount at any angle, but up to 45 degrees off of flat it should still be accurate, and there'd be no bias.
I don't know if theirs does that, but I know mine will, now that I've thought of it. :D
Drifting
Joined: Feb 2000
Posts: 1,922
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From: Boulder, Colorado
Re: [PRODUCT] Pocket DYNO (RyanD)
If you read the manual, it says that it has to be relatively level or it will give you an error when you start the test. It then calibrates itself to take into account any small amount of tilt. A G-Tech works the same way.
Do you have one of these? Is it a proprietary plug to connect to the palm? Is there some way to log data coming across this palm connector, like you can with a terminal emulator on a serial port?
I'd be curious to see if they are just sending the accelerometer's readings at a fixed rate and analyzing them on the Palm, or if they have a processor inside the unit that integrates the acceleration into speed and distance at a high rate, and then only sends the results over.
Even if the accel data comes across at a high rate, as long as the incoming port is buffered, you wouldn't lose any, unless the OS waits a really long time to get around to handling it. And if it came at a fixed rate, then your application wouldn't need to time stamp samples, it'd use the (known) fixed time delta that the unit sends data at.
Maybe I'll ask them, but they might not give out details so no one copies their design and tries to sell a competing product.
Drifting
Joined: Feb 2000
Posts: 1,922
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From: Boulder, Colorado
Re: [PRODUCT] Pocket DYNO (99 Corvette)
Anyone know if it is only for the Palms or it will work with other PDAs like a Compaq iPAQ
Instructor
Joined: Sep 2001
Posts: 122
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From: Anderson IN
Re: [PRODUCT] Pocket DYNO (Miles in Michigan)
Anyone know if it is only for the Palms or it will work with other PDAs like a Compaq iPAQ
The website says it only works with PalmOS. I don't know which PDA's use PalmOS besides Palms, if any.
The website says it only works with PalmOS. I don't know which PDA's use PalmOS besides Palms, if any.
Drifting
Joined: Apr 2001
Posts: 1,763
Likes: 24
From: Austin TX
Re: [PRODUCT] Pocket DYNO (Miles in Michigan)
Palm does RS232. Its a pretty easy platform to develop software for. I've played with it a little bit.
Let me know when you're making progress with your software for linux. I'll probably buy one and play with it too.
Eric
Let me know when you're making progress with your software for linux. I'll probably buy one and play with it too.
Eric
Drifting
Joined: Feb 2000
Posts: 1,922
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From: Boulder, Colorado
Re: [PRODUCT] Pocket DYNO (66ImpalaLT1)
Palm does RS232. Its a pretty easy platform to develop software for. I've played with it a little bit.
Let me know when you're making progress with your software for linux. I'll probably buy one and play with it too.
1st Gear
Joined: Jul 2002
Posts: 1
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From: Birmingham MI
Re: [PRODUCT] Pocket DYNO (Miles in Michigan)
I am willing to answer any questions that you may have about the PocketDYNO. My email is email:brennan@pdyno.com. I can also provide some results that I have from testing my friend Brian's Z06.
Thread Starter
Le Mans Master
Joined: Apr 2000
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From: Motor City Vettes Ringleader
SE Michigan Coordinator
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St. Jude Donor '09-'11,-'13-'14-'15
NCM Sinkhole Donor
Re: [PRODUCT] Pocket DYNO (pocketdyno)
:cheers: Glad to see a product representative! Welcome to the Forum! Get ready for a stack of questions, and possible orders! :)
Maybe we can run a Group Purchase deal! Please let us know!
Thanks
Zack
Maybe we can run a Group Purchase deal! Please let us know!
Thanks
Zack
Le Mans Master
Joined: Apr 2001
Posts: 8,133
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From: Ex-SF Bay Area; now happily Denver area
Re: [PRODUCT] Pocket DYNO (EuG)
Wow! Way C:cool::cool:L!
Looks like it got much better features than G-Tech.
[Modified by EuG, 2:57 PM 7/19/2002]
Looks like it got much better features than G-Tech.
[Modified by EuG, 2:57 PM 7/19/2002]
Anyway, I have to say that the G-Tech Comp could be a great unit when they get the bugs worked out. I've considered keeping it for the updated changes but have decided it would be better to return it and maybe buy the improved one later. By the way, when the shift lights did work, they were pretty cool and you didn't have to watch the tach or HUD.
This PocketDyno looks easier to use and is a little cheaper ($199) but requires a hand-held palm and, again, doesn't have all the features of the G-Tech Comp.
Just my impression of the two.
