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Open Design for ~$800 Swarm Robots

An anonymous reader writes "There are lots of multi-robot designs out there. Most are either research platforms well over $2K (often $10K or more), or are hobbyist bots under $400 with tiny brains and few sensors. But George Mason University's new FlockBots wiki is interesting. They're trying to pack as much functionality as possible into a roughly $800, 7" mobile swarmbot, and publish the design and software as a free and open spec. So far their design includes a wireless 200MHz Gumstix Linux computer, a camera, range and bump sensors, wheel encoders, a can gripper, and lots more. It's a great-looking design and I think the cost could drop to $500 with vendors doing consolidation."

72 of 106 comments (clear)

  1. Comment removed by account_deleted · · Score: 2, Funny

    Comment removed based on user account deletion

  2. Re:I for one... by ServeYourWorld · · Score: 1

    I for one welcome our new low-cost overlords.

  3. Ahh but does it cyber? by SComps · · Score: 1

    When they come up with something like this

    http://www.questionablecontent.net/view.php?comic= 234

    THEN I'll be impressed. ok.. so I am already, but hey.

    Awesome stuff though!

  4. Military applications? by CyricZ · · Score: 4, Interesting

    I wonder if we'll see freedom fighters in countries like Iraq and Afghanistan start to use robots like these such as weapons (assuming these researchers do succeed in keeping the cost low). Indeed, considering the US military's increased use of drones and unmanned combat vehicles, it is doubtful that those they are fighting against will not soon resort to employing he same methodologies.

    This particular device uses Linux, which brings up another question: should developers of open source software license their software so as to prevent it from being used in such killing devices? Or should freedom trump such an argument?

    --
    Cyric Zndovzny at your service.
    1. Re:Military applications? by haakondahl · · Score: 1, Flamebait

      Only if by "freedom fighter" you mean "technologically inclined terrorist". I suppose one of the optional packages might have the thing roll into a crowded restaurant and blow itself up.

      And what would you intend with your anti-"killing device" license? Do you *really* want to drive the people who intend to kill with computers into the arms of Microsoft? I can see it now; the "Blue Screen of Death to America"

      Moderator Filter: If you want to call me a troll, READ THE FUCKING PARENT.

      --
      Don't trust anyone under thirty.
    2. Re:Military applications? by cranos · · Score: 3, Insightful

      Nope not a chance. Part of the reason why the insurrgency has been so successful is the low tech aspect. This is something the US found and the forgot about in Vietnam. In a straight up battle, the US probably has the best technology in the world, against simple devices such as road side bombs and car/truck bombs they don't know what to do.

    3. Re:Military applications? by hoggoth · · Score: 5, Funny

      > should developers of open source software license their software so as to prevent it from being used in such killing devices?

      This is a great thought. By forbidding using open source software in killing devices we will cause great numbers of lawyers to approach the fighters to serve notice of the lawsuits. The fighters, of course, are already killing people and killing a few lawyers that get in their way won't bother them.

      Killers use up their inventory of killing robots.
      Software developers feel good about being on the moral high-road.
      Lawyers die.

      It's a win-win situation.

      --
      - For the complete works of Shakespeare: cat /dev/random (may take some time)
    4. Re:Military applications? by Admiral+Burrito · · Score: 4, Insightful
      This particular device uses Linux, which brings up another question: should developers of open source software license their software so as to prevent it from being used in such killing devices?

      Somehow, I doubt that people who would use the software for such purposes would be dissuaded by the licensing conditions.

    5. Re:Military applications? by Profane+MuthaFucka · · Score: 2, Insightful

      We should not restrict anybody from using software. If we allowed restrictions then everybody would have their favorite restriction.

      -no military uses
      -no Taliban can use this software
      -no al Queda can use this software
      -no Nazis
      -no Republicans
      -no vegetarians
      -no meat eaters
      -no SUV drivers
      -everybody but Martha Stewart

      and so on. Pretty soon what was free isn't so free. That's because restrictions and freedom and opposing concepts. When in doubt, go with freedom. Some people will do things don't agree with with their freedom, but if you try to stop them from doing these disagreeable things with their freedom, you are the DEVIL.

      --
      Fascism trolls keeping me up every night. When I starts a preachin', he HITS ME WITH HIS REICH!
    6. Re:Military applications? by hernick · · Score: 2, Insightful

      Open Source must be free for all or else it isn't Free. Should the GPL include a clause that prevents military contractors, neo-nazis, child molesters and Bill Gates from using the software ?

      Never. We cannot exclude a single group from using Free software. This would be a desecration of the Freedom that the software stands for. Also, every OSS author would use the license as a political platform to condemn people at random: "This software cannot be used by Southern Baptists, Wahhabists and the followers of Ayn Rand."

      --- By having read this post, you have already agreed to the Mostly Open Posting License. You are hereby granted the generous authorisation to read this post, but only if you are not a Witch, the daughter of Bill Gates or a fat-cat billionnaire. If you have read this post illegally, in defiance of this read-through license, you must paypal ten thousand american dollars to the author of this post, before Big Ben has sounded the upcoming call of midnight.

    7. Re:Military applications? by B3ryllium · · Score: 2, Funny

      I'll take "Before and After" for $2000, Alex.

    8. Re:Military applications? by ph0enix · · Score: 1
      Developers of killing devices won't use Linux, of course. The'll use the OS specifically licenced for these purposes: OpenBSD.
      "...software which OpenBSD uses and redistributes must be free to all (be they people or companies), for any purpose they wish to use it, including modification, use, peeing on, or even integration into baby mulching machines or atomic bombs to be dropped on Australia." -- Theo de Raadt
      --
      <sigh>
    9. Re:Military applications? by CyricZ · · Score: 1

      That's a very interesting quote. I often hear Theo described as a cockfool or a fanatic. But that quote, if he really did say it, proves the opposite. It would suggest that he is one of the few people who truly understands the notion of "freedom", in that true freedom allows one to do anything one wishes. Could you provide a link to the mailing list archive or newsgroup posting or wherever it is that he says that? That quote shows the freedom that every open source developer should drive for.

      --
      Cyric Zndovzny at your service.
    10. Re:Military applications? by ph0enix · · Score: 1
      That specific comment was made in regards to the removal of IPF. But this interpretation of the concept of freedom is strongly held by the whole OpenBSD development team; just have a look at the Lyrics page, which outlines some of the big issues behind OpenBSD releases:
      • 3.3 - Sun refuses to release full documentation for the UltraSparc III processor.
      • 3.4 - OpenBSD loses funding after no-strings-attached grant turns out to have strings attached limiting freedom of speech
      • 3.5 - Cisco attempts to assert patent rights on IETF standards (VRRP)
      • 3.6 - "Free" software projects becoming less free
      • 3.7 - Open wireless drivers and free firmware (OpenBSD is now the only free BSD. Ironic, no?)
      --
      <sigh>
    11. Re:Military applications? by gaspyy · · Score: 1

      The fact that the parent is modded insightful should serve as a warning :-)

    12. Re:Military applications? by Master+of+Transhuman · · Score: 1


      Unless a terrorist can hijack a bunch of these for free, why use them when a stolen car and some C-4 or Semtex is a hell of a lot more effective and cheaper?

      Oh, sure, I can think of scenarios where they would be useful, depending on how small they can get and still carry a lethal payload of something (explosives, gas, anthrax, whatever). But in general, it's unlikely anybody other than intelligence or military agencies of industrialized nations would use them.

      The US military has a long way to go to get drones and unmanned robotic vehicles to actually be tactically useful, let alone strategically useful, for anything other than surveillance. So it's unlikely their opponents (again, other than other industrialized nations) will bother developing equivalent tech when lower tech can be used to render the US devices ineffective cheaply without any R&D expenditure (other than a few dead members while the new technigues are being worked out, of course.)

      As for OSS, I could see licensing the software to prohibit military uses as a check against its use by countries adhering to the laws governing those licenses (are there any such countries?), but it would be useless against anyone else by definition.

      --
      Richard Steven Hack - This sig is TOO GODDAMN SHORT TO DO ANYTHING USEFUL WITH! MORONS!
    13. Re:Military applications? by ph0enix · · Score: 1

      And this is quite possibly the funniest (and oddly relevant to this discussion) email on the subject.

      --
      <sigh>
    14. Re:Military applications? by patio11 · · Score: 1
      I've always been a little fuzzy on the concept of using a robot for something a real live solider can't do better. For recon, OK, it makes sense -- we need to see somewhere, its a dangerous job, send the robot to see and we don't care if it gets shot.

      How many other operations are there for the military, though? Killing stuff? Great, we send the robot swarm somewhere with its little pop gun to... oh, wait. If we already know where the enemy is, we don't need to kill them with little pop guns. We kill them the American Way, by painting them with a laser and annihilating the area from the air (see how Saddam's sons died: demand surrender once, cordon off area, bomb). Every bit as effective, negligible danger to anyone we care about, and doesn't require any expensive capital investments in robots you're intending on using as smart-bombs anyhow.

      Or maybe the enemy is somewhere we can't airstrike, like Baghdad Hospital? Then we'll end up sending in the marines, no matter what -- we can't tolerate SwarmBot 2015 mistaking a crippled kiddy for an insurgent because if we could crippled kiddy and insurgent would both be vaporized already. Same with remote operation of the robot -- as long as we've made the decision as a nation that innocent lives are sometimes worth more than our own that calculation is going to make robots a losing proposition every time.

      Robots for remote demolition, now that I could see. They sure make a lot more sense than sending out members of the bomb squad.

      P.S. The "freedom fighters" we're facing in Afghanistan and Iraq are largely foreign, killing for the freedom to impose an Islamicist Caliphate over people that happen to resemble them a little more than they resemble us (but not by much), so they can get back to doing that whole stoning women accused of adultery and collapsing walls on top of gay guys thing that us pesky imperialists went and interrupted.

    15. Re:Military applications? by aug24 · · Score: 1

      Geek: Hey that's my software you're using!
      Major: Huh? Did someone say something?
      Geek: You've copied my software!
      Major: So?
      Geek: It's not licensed for military use. I insist you erase it immediately.
      Major: Talk to my evil killer robot. It's in there.
      Geek: Wow. Imagine a beowolf cluster of those!

      --
      You're only jealous cos the little penguins are talking to me.
    16. Re:Military applications? by hoggoth · · Score: 1

      Ahhhh....

      Nothing gets karma like killing lawyers!

      --
      - For the complete works of Shakespeare: cat /dev/random (may take some time)
    17. Re:Military applications? by floormasn56 · · Score: 1

      Why build a robot for $800? It's cheeper to tell a teenager he will get layed if he just blows himself up

    18. Re:Military applications? by RyuMaou · · Score: 1

      Oddly enough, someone's thought of that already.
      http://www.e-sheep.com/spiders/

      It's a damn good web comic, so don't /. 'em... (Yeah, like that request would help anything!)

      --
      Oh, the trials and tribulations of a network geek! Read about them at: http://www.ryumaou.com/hoffman/netgeek/
  5. Comment removed by account_deleted · · Score: 1, Funny

    Comment removed based on user account deletion

  6. Interesting equipment choice by Sv-Manowar · · Score: 4, Insightful

    Its interesting that they chose to pair the Gumstix with the Acroname Brainsem. I've been working with the brainstem for mobile robotics as part of CSCS and found it extremely flexible for robotics development. In what we've been doing, we used the brainstem chained to Zaurus PDA's, to achieve a similar linux control environment for the actual board (as the TEA language used to program the brainstem is somewhat restrictive). This platform seems like a great way for people to start out with a known good set of equipment, something that would really have helped us when getting started. (We had a whole load of teething issues getting the PDA's and brainstems talking, not to mention creating working combinations of servos)

    1. Re:Interesting equipment choice by belphegore · · Score: 2, Informative

      I think they haven't yet got a Robostix, which we designed to be a replacement for the Brainstem at a much lower price, with a better feature set, and better gumstix integration. Still not much there on the software side for Robostix, but all your normal AVR tools should work great, and control of the robostix from userspace on the gumstix is just around the corner.

    2. Re:Interesting equipment choice by Fallen+Kell · · Score: 1

      Well, a nice and fiarly cheap add-on are Polaroid Sonic Range/Distance Finders. Basically a poor man's sonar. I believe they only cost about $20. Get a good servo to mount it on and you can get some pretty decent 360 range mapping to add to the camera. This would allow much more detailed mapping to be done of the area that the robot is in for realitively little cost. There are some API's already in existance for the devices coded in C and other languages.

      --
      We were all warned a long time ago that MS products sucked, remember the Magic 8 Ball said, "Outlook not so good"
    3. Re:Interesting equipment choice by awkScooby · · Score: 2, Informative
      My Robostix was ordered last week, and should arrive next week. We'll be evaluating it to see how good a fit it is for the FlockBots, and how much effort there will be in switching to it (soldering ~40 pins per board adds up).

      If nothing else, I look forward to a microcontroller that can keep up with the quadrature wheel encoders. Having to use polling on the Brainstem was less than ideal -- we had to slow the bots down a whole lot.

    4. Re:Interesting equipment choice by Anonymous Coward · · Score: 2, Interesting

      The problem with sonar is that it eats batteries like there's no tomorrow. That's fine if you're runnng off of lead acid or li-poly like the bigger bots, but these guys are trying to run the bot for 4 hours off of a pack of 5 A's. Sonar's not feasible for this, but the excellent SHARP IR rangers they're using *are* feasible for it.

    5. Re:Interesting equipment choice by mollymoo · · Score: 1
      My Robostix arrived yesterday (actually, I got two!). They came with the pin headers already soldered on. I seem to recall Gordon mentioned something about the first batch coming with headers installed on the Gumstix mailing list.

      I've not fired it up yet, hopefully I'll have this new chassis rolling by the end of the day and we'll see what Robostix can do. It does look cool with all the headers and a Gumstix installed, just one small, solid mass of computing power and I/O connectors.

      --
      Chernobyl 'not a wildlife haven' - BBC News
  7. It would be cool if... by Tanmi-Daiow · · Score: 1

    If you could mix this with the NERO game that was mentioned a few days ago: http://games.slashdot.org/article.pl?sid=05/06/27/ 2129214&tid=206&tid=10 That would be cool, except you'd have to destroy them before they got to smart or they'd take over the world.

    --
    "Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive." - C.S. Lewis
  8. Woo Hoo! by lifebouy · · Score: 1

    Now we can start playing R/C Pikmin.

    --
    Drop me a line at:
    Key ID: 0x54D1D809
  9. Like some anonymous coward said... by myowntrueself · · Score: 2, Funny

    When the time comes to start smashing up robots, count me in!

    --
    In the free world the media isn't government run; the government is media run.
  10. Here come... by Wiseleo · · Score: 1

    ...The replicators!

    Thor's beam won't save us this time, they are already here and are replicating through mental manipulation of the scientists' brains to convince them as if they are their own creation!

    --
    Leonid S. Knyshov
    Find me on Quora :)
    1. Re:Here come... by Boglin · · Score: 1
      I feel the need to point out that it wasn't really Thor's beam. It was O'Neill that designed it (with the help of the knowledge of the Ancients). Thor just built the first unit.

      My knowing this fact tells me that I really need to get a life.

  11. Deterrent in the Field of Robotics by kai.chan · · Score: 5, Insightful

    Having an Open Design is well and good, but I think there is still one main factor that prevents the field of robotics from flourishing. The problem stems from the lack of standard in both the development of the software, hardware, and mechanics.

    Since there is no standard, someone can be using Microcontroller A with Motion Controller X using Programming Language N. Then finally combining these electronics with Servo K. When drivers for Motion Controller X has already been written under Programming Language M, developers have to spend time porting the code for another language for a different microprocessor, which might or might not work with the Servo.

    When there are so many variables in robotics without any standard, a lot of development time are wasted either porting code, finding minor differences between devices and motors that causes incompatibilities, or choosing non-optimal parts for ease of implementation. In order for the field of robotics to advance at a faster rate, there needs to be a more standardized open environment in the software, hardware, and mechanical aspect.

    1. Re:Deterrent in the Field of Robotics by kai.chan · · Score: 2, Insightful

      You completely missed the point of my post. The basic IEEE standards that you are refering to do not help the advancement of robotics.

      For example, I wrote code for a motion controller to drive some motors, with UART, serial, all adhering to these standards. But guess what would happen to that code when the motion controller needs to be changed? I have to write new drivers for the new motion controller following the manufacturer's specifications. After writing the driver, there begins a process of testing.

      Everyday electronics might have standards, but these standards that you are refering to does not mean that every microcontroller will have a Watchdog Timer, and not every motion controller will have the same states to drive motors.

    2. Re:Deterrent in the Field of Robotics by dj245 · · Score: 1

      Doesn't really matter IMO. These are really just sandbox research projects designed to generate some interesting results so that they can get more money to fund more sandbox research projects of this type. Which, in turn, must be used to 'gun for still more grants' as opposed to actually do something useful with the money. The fact that the majority of the time is spent porting code has little to do with the fact that right now the field of swarm robotics is mostly sandbox projects. I see no end to this until countries start spending less on military and more on scientific organizations.

      --
      Even those who arrange and design shrubberies are under considerable economic stress at this period in history.
  12. WTF?! by MukiMuki · · Score: 2, Funny

    No "traveling beowulf" jokes?

    Not a single Skynet reference?

    Where the hell AM I?!

    1. Re:WTF?! by haakondahl · · Score: 1

      I, too, felt a little lost until I saw a "welcome...overlord" post. Everything is OK. You're safe now.

      --
      Don't trust anyone under thirty.
    2. Re:WTF?! by The_Wilschon · · Score: 1

      Just imagine, a traveling skynet of these things...

      Beowulf is beginning...

      In Soviet Russia, Robots create cheap swarming YOU!

      But the real question is... can it run linux?



      Feel better?

      --
      SIGSEGV caught, terminating

      wait... not that kind of sig.
  13. Before they're loose... by nxtr · · Score: 2, Funny

    Make sure the switch is set to 'serve', not 'kill'.

    1. Re:Before they're loose... by haakondahl · · Score: 1, Funny

      "To Serve Man"

      --
      Don't trust anyone under thirty.
  14. Can gripper? by Tablizer · · Score: 2, Funny

    ...seems the ultimate goal is to fetch another beer without leaving the couch (and without organizing the fridge). AI has officially arrived when that has happened.

    1. Re:Can gripper? by flash_kc · · Score: 1

      They way it stands write now.. u cant grip the beer bottle without a tactile sensor at the tip.Its impossible to pre-establish the forces required to manipulate a fragile object with dynamic feedback.

    2. Re:Can gripper? by flash_kc · · Score: 1

      *without dynamic feedback

    3. Re:Can gripper? by patio11 · · Score: 1

      If tea is more your fancy, there is a robot at the Aichi Expo that does exactly that. Its more for old people.

  15. only you by jeffehobbs · · Score: 2, Interesting


    Cheap swarm robots? Hopefully they can find the room to post this somewhere in their workspace.

    ~jeff

  16. Migrating bots by MindPrison · · Score: 1

    Great! When I finally built one, it saw the other ones and decided to migrate to the south... ...I guess thats why they call them swarmbots

    --
    What this world is coming to - is for you and me to decide.
  17. Re:I for one... by ProfaneBaby · · Score: 1

    It'd be even better for high school applications ... $10k-$20k grants aren't difficult to obtain (relatively speaking), and that would help a nice chunk of kids who would otherwise have nothing.

    --
    Video Phone Blogs send video messages straight to the web.
  18. looks exactly like by t35t0r · · Score: 1

    our 2003 southeast conference robot entry, I mean exactly like ours. We had two basic stamp's on the multi level platforms, two wheels, and the shape was identical. Sorry I don't have pictures.

  19. plugin idea by relaxrelax · · Score: 1

    This is gonna give a new meaning to making a plugin to an open source project.

    You really have to physically plug it in!

    Nah, that's not right. There should be software written for the robot to install the plugin himself otherwise m$ will claim linux isn't user-friendly. It's gonna need to be a bit more friendly that windows installshield or we're gonna have some physical crashes and broken windows all over the lab - which would make Microsoft claim they're not the only one with *that* problem.

    I'd be impressed to see a few of those swarms do a "put mittens on kitten's paws" competition. Or empty a bottle of ketchup. Or replace their own batteries. (-;

    --
    Microsoft is pure dog-ma. FreeBSD is pure cat-ma.
  20. Re:Gumstix by belphegore · · Score: 1

    You can do USB host today, with a CF adapter and a USB Host CF card (drivers for the CF1U from Ratoc are in the 2.6.12 kernel).

  21. Second Variety, anyone? by Leomania · · Score: 1

    Man, the moment I read the headline I immediately thought about Philip K. Dick's short story, "Second Variety". What a great story. I never saw the movie based upon it, "Screamers"; I wonder if it was any good? Hmmm, methinks the Netflix queue is about to get an update.

    I didn't RTFA, but I'm going to assume there will be no deployable blades springing out from these swarmbots. I mean, it could be, but why take the chance and ruin a good nights' sleep?

    --
    You don't use science to show that you're right, you use science to become right.
    1. Re:Second Variety, anyone? by n54 · · Score: 1

      I've seen Screamers but I haven't read the P. K. Dick story (shame on me I know, everything he wrote that I haven't read yet is on my todo list). Anyway I highly recommend Screamers, it was very enjoyable. Afaik it is also one of the most true-to-the-book adaptations ever made and the differences that are there are imo added value (some hate the last twenty minutes while I think they follow a logical reasoning adding ambiguity I'm sure P. K. wouldn't neccessarily disapprove of). I'm confident P. K. would like Screamers better than any other of the movie adaptations.

      So be prepared that the story wont be exactly the same and enjoy it for what it is.

      --
      this comment is provided "as is" and without any express or implied legibility or congruity [...]
  22. Tesla Wireless Power Needed by Corpus_Callosum · · Score: 1

    Swambots are a great idea - the most useful purpose of which is construction, I would think. But power is a problem. Someone needs to ressurect Tesla's wireless power distribution schemes w/respect to Swarmbots.

    --
    The reason that it can be true that 1+1 > 2 is that very peculiar nonzero value of the + operator
  23. Another approach... by Jesrad · · Score: 2, Informative

    I can think of another sort of open source robots that cost well under $100.

    --
    Maybe we deserve this world ?
  24. Am I Missing Something Here? by Master+of+Transhuman · · Score: 1


    What are you going to do with ONE $800 "swarmbot"?

    If you have more than one, what's it going to cost again?

    I mean, yeah, it's better to cost $800 than ten grand, but I thought the point of a "swarmbot" is that you need LOTS of them to get anything done. If ONE costs $800 - or even $400 - I don't think anybody other than Bill Gates is going to be buying them any time soon - certainly not for "gripping cans".

    Gripping hand grenades or guns, maybe...Anybody remember "Runaway" with Tom Selleck and Gene Simmons? I loved that movie - mostly because Gene was totally cool in it.

    --
    Richard Steven Hack - This sig is TOO GODDAMN SHORT TO DO ANYTHING USEFUL WITH! MORONS!
  25. George Mason university? by payndz · · Score: 1
    Save LA from a nuke, get a university named after you. Cool!

    So is season 5 of '24' going to be Kiefer versus the $800 terrorist swarmbots? Chloe'll have them reprogrammed in no time.

    --
    You must think in Russian.
    1. Re:George Mason university? by dstewart · · Score: 1
      --
      Not every argument requires reduction to absurdity.
  26. Re:great-looking? by sshtome · · Score: 1

    Their, - sorry

    - Please no more spelling comments -
    (I wasn't educated very well at the circus)

  27. Too bad this isn't a poll by HexDoll · · Score: 1

    Here's the breast option

  28. You can shave a lot off that $800 by Rxke · · Score: 2, Interesting

    if you're willing to do some soldering.

    A look at the list reveals some of the off-the-shelf stuff is very pricey (like the battery charger, boy oh boy, what a rip-off.)

    I guess we'll see people come up with homebrew solutions to expensive off-the-shelf parts, and bring the price down to, say $400, easily.
    Might be an interesting project to follow.

  29. Obligatory Dr Who quote by oPless · · Score: 1





    EXTERMINATE!



  30. Some other similar implementations... by Anonymous Coward · · Score: 1, Interesting

    Can be found here.

  31. Idea for a complementary bot by goodEvans · · Score: 2, Interesting

    What you need is another, similar bot with a flat top and a forklift-type arrangement on front. Then you can get a lifter bot and a normal bot working in cooperation to get stuff onto a table etc.

    Now imagine a tower of these things...

    ps. I think I've just worked out where this idea came from. Remember the episode of Futurama, where Fry, Leela and Bender are trying to escape from the robot planet, and the robots chasing them start stacking themselves on top of one another, before crashing to the ground because the bottom one slipped on the shipment of lugnuts?

  32. Cost needs to go down by a factor of 100 or more. by argent · · Score: 1

    I could see $8.00 swarmbots being practical, but only for limited purposes... until they're cheap enough that there's no point in stealing them the really interesting applications are pretty impractical.

  33. Sea Swarm by Anonymous Coward · · Score: 2, Interesting

    I'm working on an underwater version. Bigest obstacle is communications. Blue-green LED (as opposed to infrared for use above water) gets good bandwidth but fallback to modulated 50kHz when link fails is a royal PITA. Power requirements aren't too bad as B&W camera with blue-green light source sees pretty well under water. Failsafe for dead main battery is valvewhich opens when power is lost allowing bladder to inflate and fish to float, belly up, like a dead fish. Beacon on belly mounted antenna runs on it's own battery which is connected when valve opens. Basic RDF to locate the dead fish.

    Not ready yet so no pix. Perhaps another 18 months ...

  34. Re:Gumstix by skids · · Score: 1

    Hrm, I've been mulling over converting an old Cannon BJC to a robot (you can see the mainboard here
    most of the way down the page.) That would be pretty damn cheap :-). ...but newer printers come with USB (gadget-side, yes, I know but it would be would be much more convenient/flexible than parrallel ports at least, and depending on the hardware it's possible host-side could be software added.) Maybe I should try to get my hands on one of those instead and see what the guts look like.

    Aren't there some IRDA/bluetooth/whatnot wire-free printers now? (Rhetorical, don't answer, I'll just google.)

  35. Commercial Kits Better and Cheaper by Anonymous Coward · · Score: 1, Interesting

    Outfits like roboticsconnection.com sell pre-cut kits (eg "Botster") that run standard microprocessors. These kits are much better made, and well under $800 already! Depending on the processor, you can get 'em for under $200.

  36. Really What Robotic needs... by nightwing2000 · · Score: 1
    Really What Robotic needs... is a high-level operating system and standard interface like normal computer OS's.

    The navigation package, the sensor package, etc. need standard interfaces to a "driver" level; just like the different drivers for various levels of the OS - file systems, disk drives, etc.

    The OS would output a command like "turn 30 degrees, go forward 3 meters." The drivers would implement these commands. Or maybe, "start turning left" and monitor the output from the "Positional" driver until 30 degrees is reached.

    Part of the standard OS (RobOS? Rollux? )would include things like building the virtual map of surroundings and obstacles to calculate the necessary navigation requirements...; receiving things like computer vision or ultrasonics via drivers, calculating arm movement requirements, etc.

  37. only a band of linux geeks by claussenvenable · · Score: 1

    would include a soda-can gripper as primary equipment on an $800 swarmbot...

  38. servo by brentcastle · · Score: 1
    speaking of robotics, anyone know where i can get something that operates like an on/off 180 degree electronic actuator at the cheapest possible price?

    I say like because if a dc motor with stops, a stepper motor, or a servo is the cheapest I'll do it. I'd preferably like the easiest/cheapest rig I can do for Thanks.

    --
    http://www.brentcastle.com