 | | RE: Sonar
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The Robotics Practitioner (trp@footfalls.com has part 1 of an article about this in the Fall, 1995 edition by Bavid Musliner (musliner@src.honeywell.com) and Rick Moll (rick@footfalls.com). Part one is concepts; part 2 will present detailed design. (...) (28 years ago, 9-Apr-96, to lugnet.robotics.handyboard)
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| | Re: Sonar
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Speaking of Polaroid ultrasonic sensors, does anyone know if there's a product out there that can multiplex a few of the sensors? Thanks. (28 years ago, 9-Apr-96, to lugnet.robotics.handyboard)
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| | Re: Sonar
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(617)386-3965 OEM Components Group 3 kits: $299, $165, $99 You're probably interested in th $99 one wich has 2 Rangers and 2 Transducers. (...) (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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| | Sonar
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I don't have my Handy Board yet, but I do need some help in locating a Sonar Ranging Module. I have looked everywhere I can think of to no avail. Even emailed Polaroid and asked them. Twice. Still have no response from them. Where do I get a (...) (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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| | HB design
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I got my handyboard on Saturday, and followed the assembly instructions that Fred did, and was thoughoughly impressed. Fred, you did great work, and have really done a great service to all of us. Thanks. (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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| | more address lines on expansion board
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Hi Brian, When Fred and I designed the Rev 2.0 6.270 controller, we consciously made the expansion bus small and simple. For most expansion devices, the pre-decoded chip selects make more sense than sending all the address lines, since the latter (...) (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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| | Pcode instructions?
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OK. I know this is going to be a long shot, but here goes: Are there any docs on the pcode? I.e. is there some way that I can learn what I need to learn to modify the source code pcode.asm besides reading the file pcode.asm and tearing my hair out? (...) (28 years ago, 8-Apr-96, to lugnet.robotics.handyboard)
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| | Re: Handyboard expansion status
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(...) I don't have one of the beta versions of the expansion board, but I've been building my own expansion boards and putting them on the HB. One thing that I've found is problematic with the HB design, in regards to expansion board design, is that (...) (28 years ago, 7-Apr-96, to lugnet.robotics.handyboard)
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| | http://lcs.www.media.mit.edu/groups/el/projects/handy-board/maillist.htm
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i would like to use the list. thankyou, Jeff (28 years ago, 7-Apr-96, to lugnet.robotics.handyboard)
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| | mseconds
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Is there a way to get sub-milisecond times measured with the handyboard? I was thinking of trying to modify msecond but I can't look at it now that it is a primitive. Dirk (28 years ago, 7-Apr-96, to lugnet.robotics.handyboard)
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| | Expansion board
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How many Polaroid range sensors can the expansion board have up to. One? What kind of signal does it produce? (29 years ago, 5-Apr-96, to lugnet.robotics.handyboard)
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| | Re: High current motors
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I think the question on how to run higher current motors has got to be the most asked question here. Maybe we should add more info to the FAQ or something. Anyway, here is Chuck McManis' solution from a while back. I hate to send out something that (...) (29 years ago, 5-Apr-96, to lugnet.robotics.handyboard)
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| | Re: High current motors
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How about this one? ...to enable two directional rotation. ___...___ motor ___...___ | | | | -> / / -> |/ |/ |/ |/ ---| ---| ---| ---| | |\ | |\ | |\ | |\ | \ | -> | -> | \ | | | | | | | | | | | | | | | | | vcc | gnd | gnd | vcc | | | | | | | | | | (...) (29 years ago, 4-Apr-96, to lugnet.robotics.handyboard)
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| | Re: High current motors
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Do you have to choose a transistor that will switch somewhere near and below 9 volts? Cause Fred mentioned that the handyboard is rated for 9V motors. But, does this mean that the pulse generator make 9V square waves? (...) (29 years ago, 4-Apr-96, to lugnet.robotics.handyboard)
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| | RE:
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It would work but it would be uni-directional. --Chuck ---...--- From: MAR ERICSON[SMTP:mar@cooper.edu] Sent: Wednesday, April 03, 1996 11:27 AM To: handyboard@media.mit.edu Does anyone know if you can do this to the L293D chip to increase the (...) (29 years ago, 3-Apr-96, to lugnet.robotics.handyboard)
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| | Question !
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What should be the nominal voltage of the DC-Motors for the handyboard, I know that in miniboard its 6v - 36v. Thanx. Hachemi. (29 years ago, 3-Apr-96, to lugnet.robotics.handyboard)
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| | (no subject)
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Does anyone know if you can do this to the L293D chip to increase the current? _____- motor +________ / | L293D |/ | motor output___...___| + |\ \->- baterry | | - | | | | ---...--- The transistor in the center would be a high current one. Would (...) (29 years ago, 3-Apr-96, to lugnet.robotics.handyboard)
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| | expansion interface
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How is the beta-test of the expansion interface progressing? Anybody care to estimate when the design might be finalized so I could purchase one? How much would a kit be expected to cost? \---...---\ \ John Mathews jkm@po.cwru.edu \ \---...---\ (29 years ago, 2-Apr-96, to lugnet.robotics.handyboard)
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| | 26 VDC motor
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Using the handyboard, can we drive a DC-motor which has a nominal voltage of 26 volt, (the starting current is less than 600mA). Thanx. Hachemi. (29 years ago, 2-Apr-96, to lugnet.robotics.handyboard)
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| | Re: hooking up to R/C car
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(...) A really wild/money is almost no object idea would be to get electronic speed controls from radio controlled cars. These things can control up to several tens of amps continuously. You can control them like controlling a servo. Their cost is (...) (29 years ago, 1-Apr-96, to lugnet.robotics.handyboard)
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