Public projects 2

Skating Robot

Project tutorial by StaffanEk

  • 3,236 views
  • 0 comments
  • 16 respects

KITtyBot

Project tutorial by StaffanEk

  • 16,812 views
  • 7 comments
  • 81 respects

Toolbox 3


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Respected projects 1

MKR1000 WiFi Robot

Project showcase by Arduino_Genuino

  • 30,156 views
  • 10 comments
  • 56 respects

  • Send messages to the Arduino Yun with your internet browser about 1 month ago

    This is half finished, or am I missing something?
    First: Code snippet #2 ends with a string "msg" being created. Then what, it seems to end in "the blue"? I guess a Serial.println(msg) or something similar should follow.
    And then Code snippet #1? Where do I "put the code"? Do I store it somewhere on the linux part of the yun. It doesn't say anything about this but I read your tutorial how to make a web server on a SD card. I actually do it according to the tutorial and see the GUI materialize on my screen. But what happens with the message I feed into it? I guess it is stored in myarduino.local/sd/mysketch/arduino/msg/themessageiwanttosend (or something, I am trying to interpret the "$.get('/arduino/msg/' + document.msgform.msg.value + '/', function(){alert("Success");" line with very limited knowledge in html (or is it java?)). It does not show up on the (modified) sketch (making Code snippet #2 really doing something with the msg) but to just write myarduino.local/arduino(msg/themessage in the browser makes the Serial monitor display the text.
    So how is this supposed to work? Have you tried to do the tutorial yourself?

  • KITtyBot 5 months ago

    People are correct, they are not very accurate and the center position tends to drift over time. It might be os also that the 500 to 2500 ms interval not completely corresponds to 0 to 180 degrees. Another con is that they break quite easily. The pro is that they are CHEAP.:)
    Normally you can expect accuracy of maybe 5 to 10 degrees. It works good enough for my robot. Also one of the first lines in my arduino code is a variable with the zero position of every servo. It will need adjustment when the robot is built but occasionally I have to adjust it maybe 5 or 10 degrees after some using.
    These cheap servos, costing "a Fistful of Dollars", occasionally breaks also, sometimes a bit rough handling is enough. They carry load also while walking and that might eventually kill the nylon gears. Make sure they are easy to replace, avoid gluing or "embed" them too deeply inside the design.
    If you want you go "For a Few Dollars More" and buy servos with metal gears. Also there might be servos that have better characteristics when it comes to accuracy and centering. The con is that the cost multiplies with 12 so it might be a cheaper solution to replace a servo once in a while.

  • KITtyBot 5 months ago

    Interesting!
    I had to google the parallax propeller to read a bit about it. It seems like a good way forward to have parallel processing on the walking, frankly I am a little bit too much of a mechanical engineer to really judge on how much better it becomes. It would be interesting to see the result.

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