Sub $50 10Hz GPS Receiver
Not to be a dick, and it's a little more than $50, but have been available for ages (Qstarz BT-Q818XT). But that includes a more cave-man-proof concept.
The sensitivity of the antenna and more importantly the processing of the data will give different results when it comes to positioning and mounting.
I never had a problem with a Qstarz unit duck-taped to the cage (even on the A-pillar tube, with the A-pillar and the glass in the way), when using Racechrono. The frequency makes the positioning on track good enough (it's always better when you have some extra satellites and crisper data of course).
That RT DL1 have problems when there is any minor flaw in the data falls in their way of working, fix the sensors, and let the unit/software show the sensor data as-is (even create some smoke when the input voltage is off). Filtering and protection is for sissies.
The sensitivity of the antenna and more importantly the processing of the data will give different results when it comes to positioning and mounting.
I never had a problem with a Qstarz unit duck-taped to the cage (even on the A-pillar tube, with the A-pillar and the glass in the way), when using Racechrono. The frequency makes the positioning on track good enough (it's always better when you have some extra satellites and crisper data of course).
That RT DL1 have problems when there is any minor flaw in the data falls in their way of working, fix the sensors, and let the unit/software show the sensor data as-is (even create some smoke when the input voltage is off). Filtering and protection is for sissies.
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Thread Starter
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Got a couple of these in the mail today. Need to do some testing to see how much power it will consume.
Case will be designed similar to this.
Case will be designed similar to this.
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Thread Starter
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Got my second chip in the mail today. I like this one better. Cheaper, larger antenna, simpler connections.
I took it outside to get a fix and once it had it I was able to go back in my house and keep the fix. I need to take it for a drive still but good so far.
I took it outside to get a fix and once it had it I was able to go back in my house and keep the fix. I need to take it for a drive still but good so far.
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Thread Starter
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Not to be a dick, and it's a little more than $50, but have been available for ages (Qstarz BT-Q818XT). But that includes a more cave-man-proof concept.
The sensitivity of the antenna and more importantly the processing of the data will give different results when it comes to positioning and mounting.
I never had a problem with a Qstarz unit duck-taped to the cage (even on the A-pillar tube, with the A-pillar and the glass in the way), when using Racechrono. The frequency makes the positioning on track good enough (it's always better when you have some extra satellites and crisper data of course).
That RT DL1 have problems when there is any minor flaw in the data falls in their way of working, fix the sensors, and let the unit/software show the sensor data as-is (even create some smoke when the input voltage is off). Filtering and protection is for sissies.
The sensitivity of the antenna and more importantly the processing of the data will give different results when it comes to positioning and mounting.
I never had a problem with a Qstarz unit duck-taped to the cage (even on the A-pillar tube, with the A-pillar and the glass in the way), when using Racechrono. The frequency makes the positioning on track good enough (it's always better when you have some extra satellites and crisper data of course).
That RT DL1 have problems when there is any minor flaw in the data falls in their way of working, fix the sensors, and let the unit/software show the sensor data as-is (even create some smoke when the input voltage is off). Filtering and protection is for sissies.
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I so want one of these. A comparison between RaceChrono with built-in GPS (Galaxy Nexus) vs transponder at Hallett showed times anywhere from dead accurate to somewhere around a second off. Not exactly a reliable means of measurement. These times are from my 3rd, and final, session of Friday at Miatas@Hallett. That last lap was the death of my poor little IHI.
Code:
RaceChrono Transponder 1:50.24 1:51.585 1:36.38 1:36.337 1:31.50 1:31.509 5:27.44 5:26.538 1:34.61 1:35.544 1:31.61 1:31.610 1:31.51 1:31.476 1:30.58 1:30.617 1:33.23 1:33.263 1:31.94 1:31.913 1:32.68 1:32.642 1:31.04 1:30.848 1:33.98 1:34.171 1:29.97 1:29.968
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I so want one of these. A comparison between RaceChrono with built-in GPS (Galaxy Nexus) vs transponder at Hallett showed times anywhere from dead accurate to somewhere around a second off. Not exactly a reliable means of measurement. These times are from my 3rd, and final, session of Friday at Miatas@Hallett. That last lap was the death of my poor little IHI.
Code:
RaceChrono Transponder 1:50.24 1:51.585 1:36.38 1:36.337 1:31.50 1:31.509 5:27.44 5:26.538 1:34.61 1:35.544 1:31.61 1:31.610 1:31.51 1:31.476 1:30.58 1:30.617 1:33.23 1:33.263 1:31.94 1:31.913 1:32.68 1:32.642 1:31.04 1:30.848 1:33.98 1:34.171 1:29.97 1:29.968
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Newb
Joined: Dec 2014
Posts: 30
Total Cats: 0
I zee
1 bluethoot module
1 GPS module
1 mini USB for power suply
Is that all?
No extra arduino to translate the GPS code because the output trok GPS is what Android neer
Only set the baut and code of the bluethoot module and your good to go?
1 bluethoot module
1 GPS module
1 mini USB for power suply
Is that all?
No extra arduino to translate the GPS code because the output trok GPS is what Android neer
Only set the baut and code of the bluethoot module and your good to go?
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Thread Starter
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
So the chip that Schuyler linked doesn't have flash memory so the 10hz setting doesn't stick. Because of this I switched to a different chip that has flash, but that won't be here for another couple weeks.
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EDIT: it's 3am and i'm cramming for a test, but I went and got a double 1/4 pounder with cheese and I think something of that magnitude deserves a break. Look through the manual at the Electrical Programmable Fuse (eFUSE). My understanding is you set it up the way you want it, send the binary code, and it burns the current settings to the chip. One time use, hence the "fuse" part. Worth looking in to. http://www.reyax.com/Module/GPS/RYN25AI/RYN25AI.pdf
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These GPS modules output serial (as well as i2c), so you dont need anything else. Youre just transmitting serial over bluetooth.
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Meh I'll cost me $2 to add an ATMEGA328 chip to it, just more work. I think I have 4-5 them somewhere, so I'll probably just do that since I already have the chip. Props (but I'm mobile and don't know how) for digging in to that though, good to know.
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Thread Starter
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
I have the command for changing the rate somewhere written down too, but its pretty simple. I'm buying the flash chip just for science. Funny how this has cost me more than the Qstarz module.
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