originator99 said...
Matt Does your robot have to be wireless?
Hello originator99,
What do you mean about does it have to be wireless? That is the only way I can think how to communicate with the robot/boat that is 3,000 to 4,000 miles away unless you have any better ideas? (not trying to be funny)
Regards,
Matt
Kevin Wood said...
To be fair to HF, it could be made to work, but there are considerations that you would need to design around. VHF and above has its' considerations, too, but it would probably be easier to implement.
Kevin,
This is very true. That is why I am giving myself 2+ years to figure out the best route to take on accomplishing this task.
And again most of what we are talking about depends at large on BAND conditions, ie are they open or not, I would think if you were to try it on HF 20m would be your best bet, but as Kevin mentioned a 20m beam is big very big, I own what they call a tribander for 10, 15, and 20m bands the boom alone on that yagi is 14' on top of a 45' tower. VHF would be easier to implement, but the range would be limited, dont think you are going to get around the world without great conditions (ie never happen). Even HF is not a sure thing, just because I can reach a country today does not mean I will be able to reach him the next. Now as to the AMSAT, I have not played around with that at all, just does not intrest me atm, but I know something about it, for one thing a person can send a message to one and have it broadcast that message at a later time ie different location of the world. Not sure to what extent or if it could be use for what you are wanting. I dont recall ever hearing about anyone doing telecommand on HF but I would guess it would be possible, nor am I aware of a band allocation for it, in HF, as I stated earler 6m (VHF) is where most of the HAM telecommand is norm used. Kevin is right, while a HAM license gives you a right to hack stuff, it is still within a guideline set by the FCC, there are rules for our hacking LOL, and there are what they call certain engineering practace plans you must follow when building equipment. One thing to note, is that if you do decide to try this remeber large antenna's take room, ie land to deploy them on, and you must be in an area where you can put one up, ie building codes ect. I would search the ARRL web site to see if anyone has tried this before, and what was their success ie learn from there mistakes, or accomplishments. BUT what ever you do, just remeber above all, as most hams will say, be safe and have fun doing it.
originator99 said...
"How would one communicate between a computer and a robot long distance? like 1000, 5000 feet - 5, 10 miles."
Maybe I misunderstood something. I thought you were discussing 5-10 miles
originator99,
Yes, my second goal is to communicate with my robot up to 10 miles or so. I have found a couple of transceivers that would allow me to communicate between computer and robot. My third goal is to communicate very long distance somewhere around 2,000 to 3,000 miles if not more with the help of VHF, UHF, or HF.
The ArmsCorp (developed the code hopping radio your US army copied, the South African Atomic Bomb, the German and South African long range artillary, the israeli night sight system and much else) made both a small robot sized remote control tank/bomb and a remote control rocket that operated at several MILES and they were both wire guided. These strange devices uncoiled their thin steel "umbilical cord" as they went along... (you can jam radio but can't jam wire guidence). I had the good fortune to watch the trials in 1969 and the American Military Attache at the same trials was very worried by what he saw.
Obviously this is not an option these days but there are always alternatives.
I'm comming into this late, but I have a quick qustion on the Maxstream 100 mW transmitter (spaseficly the XBee-PRO™ ZigBee OEM Module).·· First, can you directly feed video from a Camera with an RCA jack output, into the datain pin of the transmitter?· Also, can a module transmite AND receive information at the same time (for example, transmit video and recieve data simultanuasly)?
I don't know if this has been mentioned, but, if you plan to use this robot in an urban area, you could use a cell phone as a modem. Also, with the increasing interest in providing WiFi coverage in major cities, that could be used as well.
My first project I will most likely be using the Parallax 433 MHz RF modules because the robot will just be moving around my house so within the 500 foot range of the modules. My second project I was thinking about using the maxstream XTend™ OEM RF Module or another product with that range. This thread has mostly been about communicating with my third project which will be in the middle of the Atlantic Ocean most of its run. So I am looking at it being as close as one mile in the beginning to about 3 or so thousand miles away in the end. I have been asking about what is the best way to communicate with the robot/boat and a couple of people have said using ham radio, which I am in the process of looking into.
Regards,
Matt
Post Edited (Matt Battle) : 8/16/2006 9:33:58 PM GMT
Comments
What do you mean about does it have to be wireless? That is the only way I can think how to communicate with the robot/boat that is 3,000 to 4,000 miles away unless you have any better ideas? (not trying to be funny)
Regards,
Matt
Kevin,
This is very true. That is why I am giving myself 2+ years to figure out the best route to take on accomplishing this task.
Regards,
Matt
Maybe I misunderstood something. I thought you were discussing 5-10 miles
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Truly Understand the Fundamentals and the Path will be so much easier...
Yes, my second goal is to communicate with my robot up to 10 miles or so. I have found a couple of transceivers that would allow me to communicate between computer and robot. My third goal is to communicate very long distance somewhere around 2,000 to 3,000 miles if not more with the help of VHF, UHF, or HF.
Regards,
Matt
The ArmsCorp (developed the code hopping radio your US army copied, the South African Atomic Bomb, the German and South African long range artillary, the israeli night sight system and much else) made both a small robot sized remote control tank/bomb and a remote control rocket that operated at several MILES and they were both wire guided. These strange devices uncoiled their thin steel "umbilical cord" as they went along... (you can jam radio but can't jam wire guidence). I had the good fortune to watch the trials in 1969 and the American Military Attache at the same trials was very worried by what he saw.
Obviously this is not an option these days but there are always alternatives.
Kind regards from Africa
John Bond
Thanks
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NerdMaster
For
Life
Also, you might want to see this thread: http://forums.parallax.com/showthread.php?p=601155
What's your cost for a dev system?
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Propeller + Hardware - extra bits for the bit bucket =· 1 Coffeeless KaosKidd
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My first project I will most likely be using the Parallax 433 MHz RF modules because the robot will just be moving around my house so within the 500 foot range of the modules. My second project I was thinking about using the maxstream XTend™ OEM RF Module or another product with that range. This thread has mostly been about communicating with my third project which will be in the middle of the Atlantic Ocean most of its run. So I am looking at it being as close as one mile in the beginning to about 3 or so thousand miles away in the end. I have been asking about what is the best way to communicate with the robot/boat and a couple of people have said using ham radio, which I am in the process of looking into.
Regards,
Matt
Post Edited (Matt Battle) : 8/16/2006 9:33:58 PM GMT