 | | Re: HB pins ?
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Go to the Handy Board web page and follow the links to the schematic diagrams. These will probably answer most of your questions. I have to look them up myself, every now and then. Larry (...) (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | Re: HB pins ?
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(...) You might want to check the handy board web site, at (URL) as it gives a diagram of the function of each connector on the board. Also, there's a document about interfacing sensors to the handy board which will give you a pretty good idea of (...) (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | HB pins ?
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So far, I don't know wihch is which in the HB I/O pins, I know that 0 to 6 are analog in, and 7 to 15 are dig. in, but I want to know which one is PA1, TOC1, ... and also what does the first row means, the second , the third, and for some of them (...) (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | Re: "cher" archives
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(...) Patrick, the URL you're looking for is: ftp://cherupakha.media.mit.edu This is the ftp archive of the Epistemology and Learning Group at the MIT Media Laboratory. The Handy Board information can be found in this folder: (...) (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | Sign me up to mailing list
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-- Eric Eisenhower Chief Technical Officer Intelus - a SunGard Company 9210 Corporate Blvd #400 Rockville, MD 20850 ee@intelus.com 301-990-6363 x230 301-330-6707 fax (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | Re: it works!
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(...) Great Jeff, I've been planning on doing the definitive breadboard/diagram and document here but haven't gotten to it. Don't worry overmuch about "oversaturation", you are using the transistors as switches and as long as you don't violate the (...) (28 years ago, 22-Apr-96, to lugnet.robotics.handyboard)
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| | IR & Modules / Need help
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I am installing a couple IR emitters and two Radio Shack / Sony IR modules for close in object avoidance. Two main questions: 1) Which software do I use? I have R22-ir.icb which seems to be for the 6.720 Rev. 2.2 board. Will that work? 2) Where does (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | "cher" archives
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OK, I know this is going to sound like a stupid question to most of you, but here goes: I've noticed more than a few referrals to "the cher archives" since I've been on this mailing list, but I haven't figured out how to get there. Can someone give (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | it works!
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Hey, it's time to celebrate! :-) I managed to get the h-bridge circuit working, after thinking about it for a while, tinkering a bit, and reading a couple chapters on transistors... :-) I can run a motor forward and backward, with no problem. The (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | Re: Handy and mini boards
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(...) Yup. Worked for me. :-) I used port D on the HB as a 4 bit output, ran a cable from there to port C on the MB, and used one of the Y signals on the HB as a data ready line. On the MB side of things, I just sat in a loop waiting for YX (where X (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | Handy and mini boards
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Has any one thought of the possibility of interfacing a miniboard to a handyboard? It would be a cheap way to get extra input/ motor control. Is this possible? (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | RE: diodes in h-bridge
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When the motor power is removed, the motor generates a reverse voltage. This voltage can damage the transistors, the diodes provide a conductive path back to the power supply to absorb these spikes. Convieniently, N-channel MOSFETs (and other (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | Code for Polaroid Sonar board
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Hi Kent, I just wanted to let you know that your code for the Polaroid ranging boards is fantastic! It works right out of the box! Keep up the good work. - Prabal P.S. For anyone who doesn't know what I'm talking about, Kent wrote some code to (...) (28 years ago, 21-Apr-96, to lugnet.robotics.handyboard)
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| | diodes in h-bridge
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What do the diodes across Q1-Q4 do, in Chuck's h-bridge design? I haven't figured that out yet.... (28 years ago, 20-Apr-96, to lugnet.robotics.handyboard)
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| | mailing problems fixed (already! :-)
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Ok, disregard that last message. :-) (28 years ago, 20-Apr-96, to lugnet.robotics.handyboard)
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| | list problems
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I'd just like to let everyone know that I'm currently not receiving the mailing list, (who knows why!) so could everyone _please_ mail me copies of any responses you make to my mail? The only other way I have to view them is by checking the mailing (...) (28 years ago, 20-Apr-96, to lugnet.robotics.handyboard)
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| | 2n2907 transistors
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I'm trying to build the h-bridge circuit posted on this list, and, of course, I'm having problems. It simply doesn't work. So, in my efforts to troubleshoot the thing, I'm trying to figure out how each part of the circuit is supposed to work. Which (...) (28 years ago, 20-Apr-96, to lugnet.robotics.handyboard)
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| | Re: high current motors
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This is a repost of a message I sent a few days ago. It bounced back to me, and I don't think it ever made the list... (...) (28 years ago, 19-Apr-96, to lugnet.robotics.handyboard)
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| | Re: motor voltages
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An LM317T is probably what you want. It will provide 1A continous or 1.5A with heat sink. Put a large Cap on the output to take care of peak surge requited by the motors when turned on. These temperary heavy current needs will not hurt the (...) (28 years ago, 19-Apr-96, to lugnet.robotics.handyboard)
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| | Multiple Servo control ??
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Has anyone looked into using the "Mini SSC (Serial Servo Controller)" with Handy Board? Has anyone written any code to allow HB to SSC comunications? I would be very greatful for any info on combining the HB and SSC. Thank you, Larry ***...*** Larry (...) (28 years ago, 19-Apr-96, to lugnet.robotics.handyboard)
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