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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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Satellite receiver is a little receiver which comes with the HK TXs. I think I removed them from your kit as extra parts confuse people. It needs a fair bit of software to work but its basically an extra receiver.

I can program it to mix or whatever.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Jun 27, 2010 4:46 pm 
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Philip
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Joined: 18 Jun 2004
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Location: Queensland near Brisbane


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Thanks.

Do you know of a site with good beginners programing information?
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So even the rain that falls isn't actually going to fill our dams and our river systems

Post Sun Jun 27, 2010 5:12 pm 
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marto
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I started writing this months and months ago as an extra resource for a subject I am tutoring. Its on programming in assembly. But this may just be more confusing. I would try doing a few things just on PC in python/C/C++ to start off with leave the embedded once you have a bit of a grasp of how things work.

http://dl.dropbox.com/u/815267/ENB244_Supplementary_Robotics_Notes.pdf

^^It hasn't been proof read and is no where near finished. Also assembly is really very low level and unnecessary in 90% of applications today.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Sun Jun 27, 2010 5:19 pm 
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marto
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Joined: 08 Jul 2004
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Ok well I think I have my head around the satellite RX code. There is a fair bit of bit banging which may get pretty interesting as I don't have a scope......

I have a some sample code which is for an Arduino Mega. The B-328 is sorta Arduino compatible so I could finish off / port code in Arduino or I could port it to C. Or even assembly if anyone wants to do some crazy stuff which needs ultra fast code.

Does anyone have any preference ATM I am thinking of porting to C. But if people would prefer it in the simpler Arduino coding format I can leave it there and just finish/fix it for B-328.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Mon Jun 28, 2010 4:21 pm 
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kkeerroo
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Joined: 17 Jun 2004
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Location: Brisbane


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I'm still old school radio stuff here so what is this satellite Rx? I am Interested in getting rid of the slow 50Hz servo pulses and have been working on my own 2.4GHz system but can't afford PCB prototyping at the moment.
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Post Mon Jun 28, 2010 5:28 pm 
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Spockie-Tech
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Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia


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http://www.google.com/images?q=wiring%20pencil

Greatest Prototyping tool I've ever found.. Smile

I wish I had known about them 20 years ago when I started making proto's with wire-wrap wire by hand. You need good short-range eyesight (or a magnifying lamp) and a steady hand, but with one of these, some donut-ring perf board (Jaycar, Dick Smith) you can knock up (and easily change) a prototype in no time. You only go to etch-PCB's once the design is finalised

Available in Aus (and the spools of wire) from Farnell for about $20, or make your own out of a standard CLick-LeaD Pencil and some bent coathangers.
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Post Mon Jun 28, 2010 10:28 pm 
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Philip
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Joined: 18 Jun 2004
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Location: Queensland near Brisbane


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quote:
Originally posted by marto:
Does anyone have any preference ATM I am thinking of porting to C. But if people would prefer it in the simpler Arduino coding format I can leave it there and just finish/fix it for B-328.

Steve
Assuming you are asking because you intend to give out the code once you make it, I would like the Baby O to mix two servo signals with a logarithmic response and the ability to use a nano gyro. I would not presume to talk about codes.
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Post Tue Jun 29, 2010 6:08 am 
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Knightrous
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Joined: 15 Jun 2004
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Location: NSW


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quote:
Originally posted by kkeerroo:
but can't afford PCB prototyping at the moment.

PM Dumhed, he has a PCB router that can make up boards from Eagle/Protel files for good prices.
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Post Tue Jun 29, 2010 8:22 am 
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marto
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Mixing is the easy part. Nano Gyro I have no idea about. Is this an RC product or am I adding a gyro to the chip. Can be done and I am interested but need a bit more info.

Hard part atm is interfacing with the Satellite RX form the hobbyking radios. Once that is up and running should be easy.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Jun 29, 2010 9:38 am 
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Knightrous
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quote:
Originally posted by marto:
The B-328 is sorta Arduino compatible so I could finish off / port code in Arduino or I could port it to C. Or even assembly if anyone wants to do some crazy stuff which needs ultra fast code.


Arduino please Wink
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Post Tue Jun 29, 2010 9:43 am 
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marto
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Fine well link me to where to setup environment for B-328 if you can.

You can use C functions directly in Arduino you know.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Jun 29, 2010 9:57 am 
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Knightrous
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Programming Orangutans from the Arduino Environment , specifically, Section 3 .
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Post Tue Jun 29, 2010 10:52 am 
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marto
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Why must they hide these things. I was looking for that for ages lastnight.

Well should be pretty simple once I get serial setup so I can debug it.

Will keep you updated on progress
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Twisted Constructions
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Post Tue Jun 29, 2010 11:03 am 
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Philip
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Joined: 18 Jun 2004
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Location: Queensland near Brisbane


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quote:
Originally posted by marto:
Nano Gyro I have no idea about. Is this an RC product or am I adding a gyro to the chip. Can be done and I am interested but need a bit more info.

Steve
It is a normal hobby gyro, but tiny. http://www.hobbycity.com/hobbyking/store/uh_viewitem.asp?idproduct=4320 I just didn't know if it would plug in with the satellite rx.
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So even the rain that falls isn't actually going to fill our dams and our river systems

Post Tue Jun 29, 2010 7:00 pm 
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marto
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Location: Brisbane, QLD


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Hmmm I am not 100% sure how gyros work in the RC work. I assume its meant for tail rotor of heli and just runs some PID loop to keep angular rate to ~0. If so what you could do is apply a constant 1.5ms signal and then read in the output signal and use that to determine your spin rate.

However I am not sure how well it would work on the little ants and is it really necessary?

In any case I can play with it if you want it but it might be easier to get a dedicated gyro sensor rather than trying to work with RC stuff as we aren't actually generating RC signals digital data is read straight in from the satellite receiver. e.g.
http://www.sparkfun.com/commerce/product_info.php?products_id=9165
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Jun 29, 2010 7:45 pm 
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