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    Question(s) Re: Automatic Door Opener

    I love this one :

    YouTube- Beer Robot


    Another favorite, machines made by Jamie Hyneman of Mythbusters

    YouTube- 7up commercial - improved vending machines
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    Project Re: Seeker 2x - Mini Sumo

    LOL! Spaceballs quotes for minisumo!
  3. Re: Rocket Science Soldering/Splicing Examples

    I've liked this video explanation, but have not put it into practice yet :
    YouTube- Surface Mount Soldering 101
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    Re: Issy Goes Fire Fighting

    Fergs, that is too cool, great to see!
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    Re: Another first controller thread...

    Personally I'd go for the Arduino Mega, and probably add an XBee Shield to it for wireless. After learning a bit with the Arduino IDE, might go on to AVR programming in GCC using the ICSP header,...
  6. Thread: NanoSeeker

    by robologist
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    Project Re: NanoSeeker

    Hey Jon, looks awesome but was wondering: how do you keep it from rolling in the water? Along the central axis? Fins redirecting water flow? Just would expect a tube to naturally turn with the...
  7. Re: Looking to buy lynxmotion tri track chassis

    Oops, sorry Tybs, did try to look here first, just didn't look hard enough I guess. :robotsurprised:
  8. Re: Looking to buy lynxmotion tri track chassis

    In stock at Lynxmotion?
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    Project Re: First ever project :)

    Yeah, imagine it could be fun. I know Dave (the builder of CameraCar) has some videos of driving down the halls of SMU causing trouble. Unfortunately I don't know the range of the devices he used,...
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    Project Re: First ever project :)

    Here's a fun example in the CameraCar.
  11. Re: How to differentiate between glass and plastic and other materials

    Was this it? Or something similar? http://www.creative-technology.net/MAKE.html
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    Project Re: Active RFID Asset Locating

    Might check out the Loc8tor website, see if it's close to what you need. I've thought about it for a robot application, somewhat like hunting for a lost Roomba.
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    Project Re: W.A.L.T.E.R. v2.0

    Another possible is to snag the double casters from strollers. Doesn't seem to be a week go by without someone tossing a stroller out.
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    Question(s) Re: Rover based competitions?

    One AVR based color tracker was/is the AVRcam, not sure to what success it has been used to track the orange traffic cones in Robomagellan events. Think I heard about folks trying that or the CMUcam...
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    Question(s) Re: Rover based competitions?

    Had to look to see, and found there's no PDXbot from the Portland Robotics guys this year. They've had Robomagellan events in the past, and indoor stuff. Other events was the Robogames in San Fran...
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    Re: Getting started...another newbie

    One robot I regard highly as a Robomagellan outdoor type is Dave Andersons jBot. That said, it might have some difficult with tall grasses and shrubs. A possible alternative might be to use a power...
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    Question(s) Re: I need advice

    The mechanism you've drawn is somewhat like what I had in mind, seems like it would be effective. However I would still use a pair or RC servos, like some HiTec HS-645MGs some use here, rather than...
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    Question(s) Re: I need advice

    One possibility that I have not tried, but might work. Use a pair of servos to simply move the joystick you already have. It would require a good linkage, one that uses a bracket to move the joystick...
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    Question(s) Re: Worm gear in Servo?

    There are a couple of bipeds at Xrobots that make use of wiper motors, but in a cable suspended limited actuation manner (shuffle bots). Check out the videos for
    Android 6 YouTube - Android 6 First...
  20. Re: Turning analog inputs into multi-switch digital inputs?

    Here is a connection article for an analog keypad :
    http://www.ednasia.com/article-9327-twowirefourbyfourkeykeyboardinterfacesavespower-Asia.html
    http://www.ednasia.com/cmsimages/0612pg76_f1.jpg
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    Project Re: Power Scooter to Lawnbot

    Sorry on a late reply here, but the added casters look a bit small, like something that will dig in and get stuck in a lawn. Wheels for dirt should be taller, and wider. Have the old casters left...
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    Re: Videos of Firgelli L12 Actuators needed

    Don't know which ratio it is, but imagine Firgelli could tell you.

    YouTube - L12 FIRGELLI TECHNOLOGIES MINI LINEAR ACTUATOR
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    Re: Team Wazio - Puma

    Has anyone looked at the physical height spec of the Airtronics 94359 versus the HiTec HS-645?

    Ok, never mind, seems pretty close, 37 mm to 38 mm. Had an issue before when thinking of using Lynx...
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    Re: RC Transmitter Gimbals

    Searching at major distributors (like Digikey, etc) should turn something up. Careful, strangely some cost $100+ but there are others available for $5-10 each or so.

    Use the term "joystick" more...
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    Re: Introducing the Mech Warfare Hexapod League

    Maybe like Mechadon http://homepage.mac.com/roninsfx/Team_Sinister/iMovieTheater16.html

    YouTube - Rammstein vs Mechadon
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    Re: Mech Warfare 2010 Draft Rules

    How would the pictures from Google Street View work? Too fuzzy?
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    Re: noise from motor controller?

    Additionally, the output generated from the Arduino servo libraries is a PWM (width) signal, not a PPM (position) signal. If it were PPM, the Sabertooth might get a little confused. :)
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    Re: Mech Warfare 2010 Draft Rules

    Regarding weapons systems, how would a competitor know if their hopped up Airsoft gun will pierce the mesh while they are developing their bot at home?

    Of course, I also don't know how muzzle...
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    Question(s) Re: Indexing a wheel to a detent location.

    I tried to find a 3 sided Geneva mechanism, but found 4 and 6 stop versions. I'd also wondered about a pushrod advancing a cogged wheel, or one with detentes similar to what you have above. Latching...
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    Re: climbing robots

    What Lynn said. (The second part.)
  31. Re: How to get 12 or more Mechs competing next year.

    Ya know, the early Surveyor robot had a omnivision cam pumping video through or around an LPC2106 to an XBee module, through an OV529 chip on some sort of board. Looks like it might have been a now...
  32. Re: How to get 12 or more Mechs competing next year.

    Think this might be it? Was lucky the article was a freebie.
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    Re: First Quad Mech, yay!

    Scud, I agree with Lynn, that is a really cool quad design.
  34. Thread: Dream Servo

    by robologist
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    Re: Dream Servo

    Linear servos might be nice, mini-leadscrew devices. Firgelli stuff but a little bigger/stronger with internal electronics. And reacivity programability, a to maintain a particular force on an...
  35. Interesting Re: Ultimate collection: 101 Awesome Robot T-Shirts!

    These seem to be showing up everywhere.
    About the above site, I wrote elsewhere :
    Think 19, Johnny 5 is somewhat 80s like the movie; like 21 The DaVinci Hax; and 57 WeRobot for all the robot...
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    Project Re: Felix, a SES based 4x4 DOF quad

    Pretty cool-to-watch walker, AKA "Slightly Bigger Little Dog". Like this type of walking mechanism, more mammalian than lizard like.
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    Re: mech airsoft gun dimensions + weight

    Got a handy-dandy fps measurement device that can be easily transported to a competition to check mechs? Probably can be done, but should it be?

    Additionally, given the same fps, different weight...
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    Re: Flavo(u)r of Linux for robotics?

    Any opinions on Gentoo?
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    Question(s) Re: Servos or Steppers?

    Size is actually quite important in gears, as matching gear pitch requires that a gear with 5 times as many teeth will be 5 times the diameter of a smaller gear.
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    Question(s) Re: Servos or Steppers?

    Q 1. 3" / 5 (from the 5 to 1 ratio) means a 0.6" diameter gear if going down in torque, or 3" x 5 for 15" if going up in torque.

    Q 2. Perhaps opening up the servo and measuring the pot with a...
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