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I've been brainstorming for a while about what could be done with a kludge. I'm more into the whoosh-bang side of engineering than the beep-zap, so I don't know if it would work... A few years ago, Estes (the model rocket people) made a "rocket (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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Daniel Miller wrote in message ... (...) Daniel, I could not help but notice that you are into rockets. If so, then whoosh-bang is not the way to go. I think bang-whoosh makes a much better rocket since it should have a loud ignition, then a (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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There is a single channel sound sensor on my web page: (URL) was really designed for picking up loud noises like claps. What you want would require two mics and a circuit that would take the difference between the sound levels. Better yet it should (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | The IR beacon, was Re: Homebrew sensors?
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(...) The light sensor is directional without a tunnel. I use the IR tower as a beacon. I've got a perl script that listens for RCX messages. Here's the normal sequence of events: 1. RCX sends the message 2 "Turn on your beacon, so I can find you" (...) (26 years ago, 13-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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(...) I was thinking of something that sensed amplitude, not frequency. (Like the light sensor, which sees brightness, not color.) Of course, whatever you want for yourself is best. :) I know the logic of taking two sensors and differentiating to (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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(...) Unfortunately the bang comes with the whoosh, often leading to a rapid unplanned dissasembly. Witness the recent destruction of Delta III #1, caused by a 4hz roll oscillation, or the Titan IV that ended in a BFRC due to a clog in its wacky (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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(...) So's Michael - he's proposing a notch filter so you get the amplitude at a particular frequency, which may be better for a seeking application. Cheers, Ben. (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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In article <Pine.GSO.3.96.98111...129.6050E- 100000@expert.cc.purdue.edu>, Daniel Miller <danielmi@expert.cc.purdue.e du> writes (...) Ah. A jet engine expert. It always puzzled me how the hot air knows it is supposed to go out of the hole at the (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: Homebrew sensors?
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does pressure difference make any sense?..:-) Selçuk (...) (26 years ago, 14-Nov-98, to lugnet.robotics)
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| | Re: The IR beacon, was Re: Homebrew sensors?
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(...) And if you mounted some sort of plug on the front of your robot it could mate with a matching socket when it entered the garage and wait there until its batteries were recharged! (26 years ago, 16-Nov-98, to lugnet.robotics)
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| | Re: The IR beacon, was Re: Homebrew sensors?
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(...) ph> I think that the light sensor is read once every 3 milliseconds. When you ph> think you're reading the light sensor, you're really getting the last ph> sample. Anyone want to verify that? Dunno about the bit level, but the Official Lego (...) (26 years ago, 16-Nov-98, to lugnet.robotics)
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| | Re: The IR beacon, was Re: Homebrew sensors?
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(...) Eventually, I want to make a robot that can keep the cats water dish filled. Eventually, maybe a humidifier. So the task becomes finding the water source, loading up, getting to the water destination and unloading. This is easy to turn into a (...) (26 years ago, 17-Nov-98, to lugnet.robotics)
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| | Re: The IR beacon, was Re: Homebrew sensors?
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(...) ...as long as you don't spill any into the RCX :) Daniel "Dan'l" Miller Senior, School of Aeronautics and danielmi@expert.cc.purdue.edu Astronautics, Purdue, Indiana danielmi@cartoon.ecn.purdue.edu (26 years ago, 17-Nov-98, to lugnet.robotics)
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