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  1. Replies
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    Project Re: First ever project :)

    Congrats, Chris!
  2. Thread: HottieBot

    by Adrenalynn
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    Contest Entry Re: HottieBot

    Funny!

    Curious why you didn't go with a little 2 channel PWM-driven motor controller. Something like the Scorpion would have cut your part count and size (and programming) down infinitely much. ...
  3. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    Yes. Let's see you get it running on an arduino - or even a SAM9...

    Again: Undocumented.

    And still undocumented.

    The module I posted is documented. With source.
  4. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    http://www.sagrad.com/index.php?option=com_docman&task=doc_download&gid=47&Itemid=70 <-- 5Ghz

    The module in your linksys example is undocumented.
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    Re: ArbotiX ROS Package 0.2.0

    Sorry I laughed. Couldn't help it.
  6. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    The SG901 modules are ~$30ea in moq: 1, have free drivers (cross platform) and they GPL the hardware abstraction layer.
    ...
  7. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    802.11n is faaaar more frequency-agile and far less susceptible to interference regardless. That's a big part of what OFDM (Orthogonal Frequency Division Multiplexing) buys. And mimo doesn't hurt...
  8. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    What 5.8 are they using?

    n is in the 5.4 to 5.75Ghz range.
  9. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    >> until you start talking about the 40kbit 3-5fps 160x120 streams which are just painful to look at

    Even then it's latency that will kill you.

    >> so with a raw 2bpp palette you can contain a...
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    Question(s) Re: Where to go from here??

    http://tinyurl.com/bms4an
  11. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    2.4ghz WiFi g can stream 60fps 720p HD without a hiccup.

    PNG isn't going to get you anywhere. You need to research motion prediction, sprites, and temporal compression.
  12. Re: Collaboration group for ROS+Arbotix-based robots

    I've got a couple HPs under the desk here that have 32gbit/sec fabric. But DLink makes some inexpensive managed stackable 32gbit/sec switches now that aren't have bad.
  13. Re: Recommended 24V Battery for laser scanner?

    Do you know what the current requirements are? Maybe you could use a boost regulator and step the power up from the Create?
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    Re: Off-Topic: Webcam recommendation request

    No worries. The occasional [enter] helps a lot between paragraphs.

    DSL is a doable solution. I had just seen you mentioning satellite in there. Latency is the killer over satellite.

    I have a...
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    Re: Off-Topic: Webcam recommendation request

    That was like a giant wall of text. But am I correct in reading you're looking to stream realtime video with PTZ over a satellite link?
  16. Re: Collaboration group for ROS+Arbotix-based robots

    In theory, if everyone played nice, ran identical [properly interpreted] network adapters feeding a carefully chosen access point(s), and followed an exact band-plan - there would be ~7gigabits, 20+...
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    Re: C# code for moving servos!

    What servo controller are you using? That's the important question - followed by what servos...
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    Question(s) Re: my own spin on the Phantom X

    dotNet will open a serial port just fine. So you can talk to the arbotiX all you like.
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    Re: Understanding a 3-XBEE network?

    If you're promiscuously broadcasting, anything that knows how to interpret a fully formed command will. If it doesn't, it'll just kick back an error, as you surmised.
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    Question(s) Re: my own spin on the Phantom X

    ROS is being worked on by one of the foremost teams in robotics on the planet right now. Fergs has an interface from ROS to the arbotiX - he's not writing ROS. That'd be Willow Garage's team.
    ...
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    Project Re: More Mule then Rover?

    That's hardly localization...
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    Re: Free stuff free stuff free stuff :p

    Given the cost of tags and the range of the scanner - I'd suggest you consider a web cam with fiducials (http://www.roborealm.com/help/Fiducial.php) or even the newest implementation of fiducials -...
  23. Re: Looking for a better IP camera? - Cisco Wireless-N Internet Home Monitoring Camera WVC80N

    We have a couple of those watching a client's datacenter. They're actually a pretty nice camera for cheap cmos and pseudo-lens. That said - they aren't so hot at holding up a connection unless...
  24. Thread: Gyroscopes

    by Adrenalynn
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    Re: Gyroscopes

    Although the Trimble GIS stuff I've used also integrates RF triangulation to help that along a bit. Averaging out the error, even with WAAS, is never going to get you down to mm accuracy without...
  25. Re: Collaboration group for ROS+Arbotix-based robots

    If everyone goes -n, then it could be constrained to 5.8Ghz and get out of the muck, right? Just lock it to a 5.8 channel space, n-only

    High rejection 2.4 antennas would help a bunch too.
  26. Question(s) Re: how to see through my webcam from some place else?

    You're looking for streaming software.

    VLC, ZoneMinder, Windows Media Encoder - three free examples.
  27. Re: Collaboration group for ROS+Arbotix-based robots

    I've been gone for awhile. Can you link me to the thread with your current walking via remote ax-12-based hexapod that has a fitPC and an arbotiX on it?
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    Project Re: More Mule then Rover?

    I'd be careful with the "all will ____". None of my large controllers will do any such thing if they lose either analog or PCM.

    But regardless - I don't really care what motor controller you...
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    Project Re: More Mule then Rover?

    >> the more I liked it(for safety reasons)

    I have to ask what those "safety reasons" versus a combat robot motor controller would be.

    >> also the $600 cost

    That's about double the cost of...
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    Project Re: More Mule then Rover?

    Have you torn the motor controllers apart and looked at the boards? A lot of these controllers are actually OEM Curtis. And documentation/pinouts are fairly easy to come by.
    ...
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    Question(s) Re: Low profile stepper motor

    Raiding junk printers is always my goto for small steppers.

    Welcome to the forum!
  32. Re: Any experience with Bumblebee2 stereo camera?

    Alas, you missed Ferg's point that the low-end gaming cameras are designed to be far sparser than we require. Raising the density actually hurts them.

    Of course, mass production always drives...
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    Question(s) Re: Newby Arbotix hassles

    I had to roll the JRE to the 32 bit version, and run the dev environment with administrative rights.
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    Question(s) Re: Arduino and SC16A Problem

    The UART is bidirectional. I was thinking the hardware serial was on 2/3, but I guess it's on 0/1. One of these clone boards is on 2/3... [shrug]

    You can run software serial or hardware...
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    Question(s) Re: Arduino and SC16A Problem

    I'm not even sure why it links...

    void setup()
    {
    Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
    }

    void loop() {}

    Get rid of all references to software serial -...
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    Bioloid Re: something wrong with bioloid

    I don't use the CM-*, preferring real controllers like the arbotiX - but I'd wonder if yoinking the connection while it's programming might have gotten it into a bricked-state?
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    Question(s) Re: Arduino and SC16A Problem

    I lost interest when I saw we were using software serial on a hardware UART...
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    Question(s) Re: breath sensors

    Well, if you use a vacuum switch, it would need to make a good seal on their face so there wasn't any escaping gas.

    How about a hygrometer (humidity sensor)? As long as your humidity is under...
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    Question(s) Re: A Good Motor Controller

    Actually, I think it's pretty effective. If you can't figure out what the problem is, just create a new problem that is impossible to repair. Voila! Now you can stop trying to figure out the...
  40. Re: Looking for small, tabletop, autonomous robot

    Maybe a half dozen of them. If they're fast enough...

    Again, same problem. Wheels go flyin off before a single ping can see the edge.

    Never trust any single sensor regardless of what it is.
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