 | | Re: MC 68HC711 E9CFN2 - please help me as soon as possible!!!!
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(...) The EPROM is probably disables with a setting in the config register. If folks are looking for cheap 68HC11A1FN's, I was able to get 'em for about $5 each, and they came with a bunch of other electronics, and 2 motors. Turns out Connor disk (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Purchase a handyboard? where???
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(...) I recommend saving up your milk money and buying a pre-assembled, tested HandyBoard. Sure, it costs a little more, but for me (electronics moron that I am) it was worth it. I bought mine from Patrick Hui at the Robot Store in Hong Kong. I can (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid Sonar Questions
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(...) <snip> (...) I found that returning the median (middle value) of three successive readings filters out the noisy readings quite well--especially the occasional large error. Just a couple nested if-then statements are needed. (...) Sure, that (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Expansion board assembly tips?
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I just got a expansion board kit from Douglas Electronics and was wondering if anyone has any tips for assembling the board, I'm quite experienced at building kits but I thought maybe someone who had built the kit already might offer some advice, (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Stupid multiple sonars...
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(...) It is correct that you can use the remaining SPI pins as digital outs to trigger a second sonar. I've done it and it works fine. It's also true that there *is* signal contention on the echo lines if you simply plug 'em both into the same TIC (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Beginner's questions...
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(...) You'll need slotted disks mounted on the axles positioned between the emitter and the detector. I recommend using ones from a dead computer mouse. (...) You ought to check for wiring problems and excessive friction in the gears and axles. That (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | RE:Handyboard project
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Hi James, I purchased an assembled and tested H Board from Patrick Hui for about $200, as well as the registered version of IC. Also got his sensor kit ($15). Expansion Board was purchased from Gleason for $59. Also bought the sensor/motor kit from (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re:Re: Beginners questions
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I got the gear sets from HVW Technologies in Canada. (URL) gear sets were pretty cheap when you take into account the exchange rate - about $20 for two. They come with motors but youll have to swap them with something else because the motors are (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | etching a handyboard
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What is the best way to manually etch the handy board, i've etched it by passing the circuit layout through the printer 3 times then ironing it on to the copper board. This works well but some traces bleed together. I have access to a PCB repair (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Canadian Boarder
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Digikey has a Canadian division also, its based out Ontario. I just recieved a list and they mostly everything on the list that has digikey beside it but nothing else. The total cost for these parts is $60 + or - $5. I hope this helps, where are you (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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