 | | Re: new icon in RCX LCD readout
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(...) I have no idea how that would come to be blinking, but normally it's the datalog icon. It means something is in the datalog, usually (I say that because I don't know why it would blink after a battery swipe). I don't know how you would erase (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | new icon in RCX LCD readout
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Yesterday I took the batteries out of my RCX to replace them with some rechargeables. After doing this I noticed a new icon on the LCD readout. On the right hand side, about midway down there is now is a pie shaped one quarter of a circle (two (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | serial tower
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I recently bought a second RIS 2.0 and was wondering if anyone had a serial tower that they would be willing to trade for a usb tower. If anyone is interested please contact me. rcx2man@hotmail.com Thank You Scott (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Detecting tilt with an Accelerometer.
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(...) No acceleration along the sensed axis, yes. (...) At this point, we need to know the type of sensor you're using (is it a pendulum type sensor, or a linear compression sensor, or gyroscopic precession sensor, or something even stranger?), and (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | RE: Detecting tilt with an Accelerometer.
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(...) Steve, The accelerometer is actually a micromachined beam. Think of a miniature version of your arm holding a 5 lb brick. Your measurement axis is rotation about the shoulder joint. Whether or not you or the brick are moving, the brick is (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Detecting tilt with an Accelerometer.
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(...) Stop eating for just a sec, and help me understand this. If a sensor (accelerometer) is parallel to the earth's surface, the reading should be zero, right? (no acceleration due to gravity) But, if the object holding the sensor begins to fall (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Detecting tilt with an Accelerometer.
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(...) I think I figured this out, right before I read this. I'm not sure if this is what you're saying, but if I put the sensor on the bottom, under the axle, then it will spin opposite the direction the LegWay is falling. So, it could actually (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | RE: Detecting tilt with an Accelerometer.
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(...) <sound of Ralph eating his poorly thought out words> John, You are, of course, correct. The beam is always under 1 G if it is parallel with the Earth's surface. In free-fall, the beam becomes "weightless" and the accelerometer returns 0. As (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Detecting tilt with an Accelerometer.
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A typical micromachined accelerometer WILL measure tilt of a platform that is not otherwise accelerating. The value the sensor returns will be g*sin(tilt angle) if the sensor is placed level on/in the platform. If the platform is accelerating, the (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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| | Re: Detecting tilt with an Accelerometer.
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(...) it. (...) Umm... that is a type of accelerometer, unless there's a terminology difference that I'm not aware of. (Consider what happens to the sensor when pushed sideways (not on axis) without rotation... you get transient swings representing (...) (23 years ago, 21-Oct-02, to lugnet.robotics)
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