 | | 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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