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Poor Man's PING))) — Parallax Forums

Poor Man's PING)))

ercoerco Posts: 20,255
edited 2011-11-21 11:37 in Robotics
http://www.youtube.com/watch?v=DLvMBUxk_As

This robot has a cheap proximity sensor that detects walls. Can you find it before looking below?










A transparent, nearly invisible mylar strip projecting ahead of the robot is a bump switch. Gets the job done! I'm actually more impressed how he got that mechanism to turn more in reverse than going forward. Probably the foot mods since his version 1: http://www.youtube.com/watch?v=Y59JL6-EPnA There's a new clutched roller on the left foot, and foot projections added.

Comments

  • Martin_HMartin_H Posts: 4,051
    edited 2011-11-21 09:27
    I've actually never used tactile bump sensors. I started with Scribbler which had built in IR and then moved on to sonar with the NXT and CBA robots.

    My latest robot is an all IR design and I discovered a problem with over the weekend. A vase filled with water does not trigger an IR sensor, so the robot grinds away unaware that it has impacted something. So a tactile bump sensor would be a good backup.
  • ercoerco Posts: 20,255
    edited 2011-11-21 09:38
    I can get you a deal on some $4 sonar sensors that will see that vase! :)
  • GordonMcCombGordonMcComb Posts: 3,366
    edited 2011-11-21 11:37
    Martin_H wrote: »
    A vase filled with water does not trigger an IR sensor

    Neither will a patio door window unless the angle is just right. Or grandpa's ankles when he's wearing his black knee-high socks.

    Best add those little switches, pronto!

    -- Gordon
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