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  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Making a mechanical gyro? in Sensors
    How fast can you spin that encoder before it starts losing steps?
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    10 replies | 3437 view(s)
  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Malum IK in Mech Warfare
    More crammed than this 33x50mm thing? Probably not on average, but the dual-rail buck converter area, and the video-switch-and-general-inverter...
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    69 replies | 14693 view(s)
  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Malum IK in Mech Warfare
    Not sure this is all that useful. The board is fairly crammed, so it's hard to tell from the CAD. Maybe I'll remember to take a photo when I get home.
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    69 replies | 14693 view(s)
  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Malum IK in Mech Warfare
    They didn't have QFN footprints to match, so I constructed them in KiCad using the recommended dimensions from the data sheets. Also: I use "QFN" to...
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    69 replies | 14693 view(s)
  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Malum IK in Mech Warfare
    I have used exactly this circuit to interface between Teensy 3.2 and 3.5 and the DXL bus, yes! The RX pin has a 560 Ohm / 1 kOhm resistive divider...
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    69 replies | 14693 view(s)
  • jwatte's Avatar
    1 Week Ago
    jwatte replied to a thread Making a mechanical gyro? in Sensors
    Oooh, that'd be awesome!
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    10 replies | 3437 view(s)
  • jwatte's Avatar
    2 Weeks Ago
    jwatte replied to a thread servo sequencing program? bipedal walker. in Mech Warfare
    Those are RC servos, using PWM control. You can generate such pulses from any of the Arduino boards, using the Servo library. I'd recommend using a...
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    2 replies | 767 view(s)
  • jwatte's Avatar
    3 Weeks Ago
    jwatte replied to a thread Mech Warfare at the NorCal Robotics Expo in Mech Warfare
    I'd like to attend if possible, too! Also, I'd like to help a bit, perhaps with scoring plates or somesuch. Maybe we can make an order to Macrofab...
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    5 replies | 1884 view(s)
  • jwatte's Avatar
    3 Weeks Ago
    jwatte replied to a thread Making a mechanical gyro? in Sensors
    That's what the magnetometer (and ideally also a GPS input) is supposed to help you solve, using some kind of Kalman conditioning. Another option is...
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    10 replies | 3437 view(s)
  • jwatte's Avatar
    3 Weeks Ago
    jwatte replied to a thread Making a mechanical gyro? in Sensors
    Optical flow from a camera to detect movement and orientation isn't half bad! You could get a NVIDIA Jetson something-or-other and a camera for it;...
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    10 replies | 3437 view(s)
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About Gertlex

Basic Information

Age
32
About Gertlex
Biography:
https://mywebspace.wisc.edu/relson/web/index.html
Location:
USA
Interests:
Archery and engineering.
Occupation:
Nuclear engineer

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TwitchMX's Gun
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Re: Mission Purple Dye - Failure
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Mech Warfare at the NorCal Robotics Expo 11-04-2019
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  1. jwatte jwatte is offline

    Agent Smith

    jwatte
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    • Created by Gertlex
    • Synopsis: Twitch is a 3 servo hexapod (for lack of better classification). Twitch is controlled via two Wixel boards and an Arbotix Commander. The mobility of Twitch far greater than any other approach to a 3-servo walker that I have seen, and makes for a cheap bot that I can let anyone try driving.