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Hi, Has anyone tried using laser diodes for detecting objects? I would be interested in finding out how they were connected and how they are read by the controller board. I am also interested in finding out what would be best. I have been looking at (...) (28 years ago, 11-Dec-96, to lugnet.robotics.handyboard)
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| | Re: IR relectance Sensors
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(...) There may be a miscommunication here. There are IR Reflectance sensors, that are designed to note notches and bar codes and such, which have a sensing distance measured in millimeters, and there are IR receiver modules that were originally (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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| | Re: ir obstacle detector
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In your message you said: (...) en bounce the IR off walls. yes, but the tv remote technology includes automatic gain circuits, so you have no way of telling HOW FAR AWAY the original signal source is. (...) ough? You can use a simple reflectance (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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| | Re: ir obstacle detector
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Is this because you used a "bright" IR led? Or perhaps the frequency is high, thus higher energy EM radiation? (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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| | Re: ir obstacle detector
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(...) Why is the distance do short? You can use a remote control for a TV or someting from really far away and even bounce the IR off walls. Doesn't that mean that you can do the same for a sensor? Or is it that the current generation of (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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| | Re: IR relectance Sensors
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I don't have the Flynn book with me currently, but I coulda sworn that I read about the Rug Warrior (or some other robot) "wall following behavior". I thought that this was accomplished by IR obstacle detectors. I was also under the impresion that (...) (28 years ago, 10-Dec-96, to lugnet.robotics.handyboard)
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| | ir obstacle detector
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This is the number of Radio Shacks fax service. I had bought the IR detector module part number 267-137 and on the back it said "For a complete data sheet call Radio Shack FaxBack at 1-800-323-6586 and request document #3313. If you do not have a (...) (28 years ago, 9-Dec-96, to lugnet.robotics.handyboard)
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| | RE: IR relectance Sensors
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(...) I checked out the web page, not all the software is loaded up yet... Looks just like what I was about to ask for, I've gotta hook a 6811 to a Vector 2X via SPI as well. Last I reported on my project, I had fried the Handyboard. The problem was (...) (28 years ago, 9-Dec-96, to lugnet.robotics.handyboard)
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| | RE: IR relectance Sensors
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Where can we find this? (...) (28 years ago, 9-Dec-96, to lugnet.robotics.handyboard)
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| | Re: IR relectance Sensors
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Those reflectance sensors are not made for detecting objects, they are usually used in something like a shaft encoder. So the 5mm is the useful range that they will have for that application. Not too useful for object detection. Digikey (...) (28 years ago, 9-Dec-96, to lugnet.robotics.handyboard)
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| | (no subject)
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My E-mail address will be switching to: ameba@email.mcleod.net -thanx (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | Re: Headers
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Good Idea! Thanks. Another Question. What are these? SINGLE ROW MALE HEADER GOLD SINGLE ROW MALE HEADER SOLDER I guess gold is a better condutor. SBut what is solder as opposed to gold. Is it soft or has a low melting point? If so, why is it like (...) (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | Re: Headers
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(...) The difference is the plating. One version is plated w/ gold and the other w/ tin. The differnce is gold gives a lower contact resistance, and usually costs more. ;) If given the choice, I usualy go with the cheaper one. My projects don't (...) (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | H-bridge.
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I'm wondering you can piggy-back transistors to create a high amp H-bridge. Would this work? :) (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | Re: Headers
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(...) Yep, those are the part no.'s Just go to digi-key's site and do a part no. search. It'll give the part description and price. matt ___...___ Matthew J. Harlan Cornell University Electrical Engineering mjh10@cornell.edu (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | IR relectance Sensors
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Where is a good place to get IR relectance sensors? Also, I'm having a little trouble comprehending some specs. What is the "sensing distance". For example, (in the Mouser CAtalog) the sensing distance of as Omron optical sensor with built in (...) (28 years ago, 8-Dec-96, to lugnet.robotics.handyboard)
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| | Headers
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I can't seem to find the male and female headers in the Digikey catalog. Is the No. in the HB Tech Ref (929974-01-36-ND and 929834-01-36-ND) the Digikey Part No.? Perhaps someone can tell me a description. Is it English or Metric? Thanks. (28 years ago, 7-Dec-96, to lugnet.robotics.handyboard)
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| | New Handy board question
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Hi! Our board is fixed, thanks for your advice David. It was actually the circuit board holder vice that we were using to hold the board while soldering. It was made of metal and shorting power to ground. . . Our second board has a problem now, this (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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| | Re: (Handy-B) wrong connection...
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(...) any normal cmos low power 28-pin (JEDEC standard) 32K RAM will work. You do not need a special battery backed variety. you also might have blown the 'hc373 chip, since that is part of the memory circuit. also check the 'hc132. hopefully the (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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| | successful downloading
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Greetings, Thanks to all who replied. I downloaded dlm.exe and a new copy of pcode and it worked with the -256 option. The old version of dlm which I had did not recognize the -256 option, and I think that was the root of the problem. Onward..... (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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