 | | Using the IR Port to simultaneously send and receive for proximity sensing
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I haven't really looked into this but can the IR port on the RCX be used to send out a message and then flip to receive the reflected infrared light thereby using it as a sensor and still have 3 ports left for other sensors? I have read about using (...) (26 years ago, 16-Apr-99, to lugnet.robotics)
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| | Re: Using the IR Port to simultaneously send and receive for proximity sensing
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In article <01BE8785.9B90A2A0.d...home.com>, David Cuthill <david.cuthill@home.com> writes (...) Unfortunately the speed of light is *** to fast. A reflection from an object 2 feet away would return in 4 nanoseconds. Each data bit of the (...) (26 years ago, 16-Apr-99, to lugnet.robotics)
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| | Re: Using the IR Port to simultaneously send and receive for proximity sensing
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(...) In fact, the IR emitters and IR receiver are in such close proximity that the receiver already receives whatever the emitters emit, using a direct path. The RCX ROM ignores messages it sends out and is thereby able to avoid getting lost in the (...) (26 years ago, 16-Apr-99, to lugnet.robotics)
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| | Re: Using the IR Port to simultaneously send and receive for proximity sensing
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(...) Ah, this is a vital piece of information I had hitherto missed. I had been puzzling over the 30ms delay which makes the Mark R. David proximity detector work, 77 times 417us is 32ms - Mark is sampling right at the end of the transmission. My (...) (26 years ago, 16-Apr-99, to lugnet.robotics)
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