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(...) and (...) I've noticed that plugging in or unplugging the serial/charger cable confuses the board. Try plugging it in first, then putting it into DL mode. If you want to unplug it, turn it off first, then power it back on (e.g, after you've (...) (28 years ago, 19-Nov-96, to lugnet.robotics.handyboard)
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Hey guys, My handy board has worked great so far! I've hooked it up with bumpers light detectors, and infared proximity detectors. But unfortunatly, last time I tried to load Pcode, my handy would not go into bootstrap download mode. After screwing (...) (28 years ago, 19-Nov-96, to lugnet.robotics.handyboard)
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| | Digital Compass
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Dose anyone know how to hook up the Vector 2X Digital Compass to the handyboard. I know to use the SPI, but what else. Any info would be great. Illegitmi non carborundum -scoooty- (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: Handyboard in the U.K.
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(...) Im not sure if Radio Shack is in the U.K. or not (I doubt it) but they sell ultrasonic tape measures for about $29. Possibly you could order a catalog from them. Alternately there were several suggestions for building your own in the group (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | RE: sonar (fwd)
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(...) This is correct, but it isn't too expensive. Scott Edwards has a PIC that will do all of the computation for you. I built a cheesy ultrasonic sensor using a Ramsey Electronics Tone Detector and a modified Rainbow electronics IR-3 board. (total (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Handyboard in the U.K.
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I'm just getting started into robotics and have spent the last weekend going over the archived mailing list (big isn't it?!). It has certainly whetted my appetite. I've lashed together a rudimentary 6811 board and have since discovered the (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Ok, the Ultrasonic Docs are up http://www.vnet.net/wizorg/wizorg.html
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Howdy all, I've gone ahead and put up the Ultrasonic Ranging System documentation and schematics on my web page: (URL) Hope it helps someone! John (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar (fwd)
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Just to add a basic newbie note on receiver blanking that will have to be designed in if you build it yourself. A transmit pulse is a very powerful (relatively speaking) pulse. For example, the Polaroid transducer, about the size of a silver dollar, (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: Used Handy Boards
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(...) Can't offer much wisdom at this time since we are at the same place as you. Decided on Handyboard, saw three different suppliers in the HB stuff at MIT, and will decide this week which to buy. We're using Polaroid sonar, IR, and bumper (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: Strange Problem???
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(...) you don't have to do it manually? I have one. it's attached, and was made by my friend. It stands for IBM-To-UNIX. I have also it's companion, UNIX-To-IBM ;) cya! (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Steel-Tec Sale
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Thought that you might me interested to know that Kay-Bee toys is having a nice sale on Steel-Tec sets. They're kinda like Erector sets. A bunch of straps of metal with holes in them. A 1000 some piece set is selling for about $20! That includes (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar
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I haven't actually priced them, but I would imagine that used Polaroid Cameras aren't that expensive. I assume that this uses the same unit that everyone is talking about. It might be worth a trip to your local pawn shop to save some money. My (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar (fwd)
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(...) Garth, To get a detailed idea about the device electronics, call (617)386-3965, Polaroid Corp., OEM Components Group. They will give you FREE literature on this. I imagine that it will help you if you want to investigate making your own (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar (fwd)
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Forwarded message: (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar
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(...) yes. the polaroid board is pretty sophisticated, really, in that it ramps up the input gain the longer it waits for the ultrasonic reflection pulse. this compensates for the exponential falloff in "volume" as sound disperses on the way out and (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar
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(...) No, you are correct. The sonar parts that Digikey and All Electronics and others offer are just the sensor and transducer. Polaroid seems to make a package with all ranging electronics included. I read an article (by Chuck McManis if memory (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: catalogs and sonar devices
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(...) Digikey 800-344-4539 (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar
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(...) I think I found your treasure. It's under "Audio, Buzzers, Microphones, Speakers..." right? ...Panasonic ceramic devices? This is my input: I have a Polaroid unit. This is what it looks like. There is ONE transducer and a ranging (...) (28 years ago, 18-Nov-96, to lugnet.robotics.handyboard)
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| | IR communication
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I want to get five handyboards to talk to each other using infrared transmission... I use infrared transmitter/receiver reflectance sensors for other things... 1) What parts (I need distributer and part number) do I need to get and can I hook up 4 (...) (28 years ago, 17-Nov-96, to lugnet.robotics.handyboard)
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| | Re: sonar
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you can get similar units from all electronics corp. for $2.50/pair. there was an issue of the robotics practitioner magazine that gave circuits for using them with the time-of-flight ranging method. colby --- Garth Webb wrote: I was paging through (...) (28 years ago, 17-Nov-96, to lugnet.robotics.handyboard)
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