GPS guidance

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

kd7ost

Posts: 402
Joined: 10/12/2003
From: Nampa, ID,
Status: offline

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

Posts: 402
Joined: 10/12/2003
From: Nampa, ID,
Status: offline

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)

Post #: 2

RE: GPS guidance - 1/27/2006 7:22:26 AM

mklarich

Posts: 149
Joined: 3/7/2002
From: Okawville, IL, USA
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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

(in reply to kd7ost)

Post #: 3

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

kd7ost

Posts: 402
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From: Nampa, ID,
Status: offline

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

(in reply to mklarich)

Post #: 4

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

mklarich

Posts: 149
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From: Okawville, IL, USA
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Too big!!!! Must be smaller!!!

Matt

(in reply to kd7ost)

Post #: 5

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

JettPilot

Posts: 1151
Joined: 4/18/2005
From: Paradise, USA
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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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Post #: 6

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

radiohound

Posts: 3
Joined: 10/25/2003
From: Gilroy, CA,
Status: offline

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 >

(in reply to mklarich)

Post #: 7

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

lvspark

Posts: 348
Joined: 4/19/2002
From: WALLA WALLA, WA,
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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 >

(in reply to radiohound)

Post #: 8

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

Skycam41

Posts: 516
Joined: 9/8/2003
From: Fort Macleod, AB, CANADA
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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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Post #: 9

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

chrisgood

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Joined: 12/6/2002
From: Monkton, MD, USA
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lvspark,

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

Thanks,
Chris

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Post #: 10

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

lvspark

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Joined: 4/19/2002
From: WALLA WALLA, WA,
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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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Post #: 11

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

chrisgood

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Joined: 12/6/2002
From: Monkton, MD, USA
Status: offline

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

Chris

(in reply to lvspark)

Post #: 12

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

spyder0069

Posts: 306
Joined: 1/13/2003
From: Rochelle, IL,
Status: offline

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.

(in reply to chrisgood)

Post #: 13

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

radiohound

Posts: 3
Joined: 10/25/2003
From: Gilroy, CA,
Status: offline

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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Post #: 14

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