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GPS guidance - 1/24/2006 7:02:55 AM   
kd7ost


 

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Start a new thread and we'll see if we can whip out a new simple guidance doobermerhinkie.

Matt


OK, Matt. Lets figure out the new doobermerhinkie. (Thats a nice word by the way) I seen big things referred to as Hogermongombie but it just doesn't have the same impact.

What can we do with this when it's done? Can we sell them? I guess we should start a list of specs.

Dan

< Message edited by kd7ost -- 1/24/2006 7:34:16 AM >
       Post #: 1

RE: GPS guidance - 1/24/2006 7:51:36 AM   
kd7ost


 

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I think initially, the thing to do is to simply replicate the operation of the PDC-10. Most consumers will want just that.

1. Reads track error and heading information from NMEA 0183 GPS info sentences RMB and RMC.

2. Connects to servo for steering with a reversible output.

3. Has adjustable gain for max throw adjustment.

4. Output servo command is proportional to track error.

5. Uses a buffer transistor rather than a MAX 242 chip. http://www.rc-cam.com/forum/index.php?showtopic=1014

6. DB9 is optional.

7. Enabled through a spare channel. Should enable with long (close to 1.5ms) pulse so guys can combine enable operation with Y cable to co-pilot or other altitude lock units. Maybe 1.2 to 1.3 ms?

Hows that to start?

Dan

(in reply to kd7ost)
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RE: GPS guidance - 1/27/2006 7:22:26 AM   
mklarich


 

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Hmm, let me shoot some pictures of the board I made up last year when we talked about this the first time.

Matt

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RE: GPS guidance - 2/14/2006 7:52:35 PM   
kd7ost


 

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The new run of PDC-10’s didn’t come about but it appears as there is a suitable sub becoming available. I don’t know anything about this device except to say it is supposed to work the same way as the PDC-10 does.

Good luck. If anybody uses one can you report back on the results?

Dan

http://scalerobotics.com/store/catalog/product_info.php?products_id=30&osCsid=bb2fcc3c7fbc9278e67a024074a5f5b0

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RE: GPS guidance - 2/15/2006 7:07:55 AM   
mklarich


 

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Too big!!!! Must be smaller!!!

Matt

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RE: GPS guidance - 2/16/2006 5:09:53 AM   
JettPilot



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quote:

ORIGINAL: kd7ost

The new run of PDC-10’s didn’t come about but it appears as there is a suitable sub becoming available. I don’t know anything about this device except to say it is supposed to work the same way as the PDC-10 does.

Good luck. If anybody uses one can you report back on the results?

Dan

http://scalerobotics.com/store/catalog/product_info.php?products_id=30&osCsid=bb2fcc3c7fbc9278e67a024074a5f5b0




That looks GREAT !!! I hope it works as well as the PDC-10... Its not to big, its just big enough for the chip and connectors... Most of the weight and size can be taken off by removing the Serail computer connector and just soldering servo wires with a plug to the GPS unit.... Weight would be almost nothing with that Serial connector cut off

JettPilot

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RE: GPS guidance - 2/17/2006 5:07:29 AM   
radiohound


 

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quote:

ORIGINAL: mklarich

Too big!!!! Must be smaller!!!

Matt


Thats funny, my wife always tells me that 3 and 3/8 inches is too small? I guess it's all about perception.

The RCAP board is 3 and 3/8" long, and 1 and 5/8" wide. It could be made smaller, but I wanted to keep it non surface mount so less people would be afraid to assemble it. It weighs just 0.8 ounces (23 grams) if you do not install the DB9, and leave out the future use headers.

Walter

www.uavs.net
www.scalerobotics.com/store/catalog



< Message edited by radiohound -- 2/19/2006 10:50:09 PM >

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RE: GPS guidance - 2/17/2006 7:37:24 AM   
lvspark



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Here is another one..
Runs on waypoints like the PDC-10, and also has altitude hold, and a 3rd servo or stepper output to function upon waypoint arrival.
PCM type failsafe and optional failsafe upon large course deviation (+/- 500' alt or 1 mile off course)
Open source code plus it's cheap!

Edit Added: Weight 22gr, 1" square, with Atmel 28 pin

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< Message edited by lvspark -- 2/17/2006 7:46:15 AM >

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RE: GPS guidance - 2/22/2006 5:12:24 AM   
Skycam41



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quote:

ORIGINAL: radiohound

quote:

ORIGINAL: mklarich

Too big!!!! Must be smaller!!!

Matt


Thats funny, my wife always tells me that 3 and 3/8 inches is too small? I guess it's all about perception.

The RCAP board is 3 and 3/8" long, and 1 and 5/8" wide. It could be made smaller, but I wanted to keep it non surface mount so less people would be afraid to assemble it. It weighs just 0.8 ounces (23 grams) if you do not install the DB9, and leave out the future use headers.

Walter

www.uavs.net
www.scalerobotics.com/store/catalog





Go Radiohound go........developing the board that is and I think you know we all want altitude lock

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RE: GPS guidance - 2/23/2006 7:08:51 PM   
chrisgood


 

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lvspark,

Can you provide a link for that Atmel-based AP?

Thanks,
Chris

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RE: GPS guidance - 2/23/2006 8:10:10 PM   
lvspark



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Chris, I can not provide a link at this time.
Wish I could but my hands are tied for now.

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RE: GPS guidance - 2/23/2006 8:28:30 PM   
chrisgood


 

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No problem, I understand. I will check periodically for updates...

Chris

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RE: GPS guidance - 2/27/2006 4:09:26 AM   
spyder0069


 

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I am stumbling on to this without all the info but:

Looking at the board I would suggest a 18F252 pic to increase your code space while retaining pin for pin compatibility. Also if you want to loose the db9 then add a FTDI serial to USB converter chip ($9) and use a usb mini B jack. The ftdi chip also lets you loose the max inverter chip, gives you usb compatibility and doesn't require you to change your code. Unless your using the db9 to attach to the gps unit. In that case forget everything I said.

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RE: GPS guidance - 4/22/2006 3:25:25 PM   
radiohound


 

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Here's a next generation RCAP. Still being developed, but should be out sometime this summer. It is 1 inch by 2 inches with altimeter hold. It weighs half an ounce. More details when it nears completion. Pictures in order are Top, Bottom, and compared to the size of the RCAP2.

Walter

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< Message edited by radiohound -- 4/22/2006 3:32:10 PM >

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RE: GPS guidance - 4/22/2006 5:16:59 PM