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 | | Re: The Handyboard (was Re: RCX 2.0 -- ideas.)
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| There are two very easy methods of making LEGO compatible 9V connectors. 1. Use Dacta #779897 9V Connecting Leads (3 pieces) @ $12.25. Cut the leads to the appropriate length for your use. Break a male 0.100" strip header (DigiKey #929834-01-36-ND) (...) (26 years ago, 4-Jan-99, to lugnet.robotics)
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fred
(score: 0.124)
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| | The Handyboard (was Re: RCX 2.0 -- ideas.)
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| (...) more than a little impressed by it. Why didn't LEGO base their RCX unit on it? Or why not the MIT Programmable Brick? (It at least had more I/O ports than the RCX does) The 6811 microcontroller is, from what I remember from electronics class, (...) (26 years ago, 4-Jan-99, to lugnet.robotics)
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fred
(score: 0.124)
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| | Re: How to use the addition analog port ?
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| these aren't actually additional ports. if you look at the PCB wiring you'll see that they're just connected to regular inputs 0-3. these extra connectors will be used by the expansion board. please look for an official notice regarding the exp (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.124)
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| | encoder to handyboard?
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| dear readers and fred martin my DC motor comes with a 10 pin optical encoder(supply current-10mA) how do i connect my encoder part to the handy board? can i ignore the encoder? my robot only needs to sense retroreflective white tape, can i just use (...) (26 years ago, 29-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.124)
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| | HOW TO UNSUBSCRIBE
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| please *don't* send unsubscribe requests to the whole list. Fred Martin is the only person who can unsubscribe you. Send him email at fredm@media.mit.edu. Fred In your message you said: (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.124)
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fred
(score: 0.124)
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| | CHARGER BOARD PROBLEM(URGENT)
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| hI FRed, anothony and others, I just plug in the RJ11 in the HD and charger board. It supposed that the red LED on the charger board should light up. It failed to light up. When I plug in the adaptor onto the charger board, the red LED light up but (...) (26 years ago, 25-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.124)
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| | Re: motor port problem
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| (...) to make the connector more physically and electrically stable. (...) of course, only 2 connections are needed to make a ckt. (...) you should figure up to several amps of current flow. (...) it should work fine. good luck. fred (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.124)
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| | Re: Serial Communication %!*#!!--Please Help
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| Hi Peter, There was recently a discussion on the list where it was revealed that the network style cable does NOT work to connect to HB's together. If you go back to the FAQ there will now be correct instructions for making a cable to link two HBs. (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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fred
(score: 0.123)
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| | RE: expansion board - servo control
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| I've had a similar problem, make sure your servo power is fully charged. An undercharged system will sometimes drive all the way one way. Mike Ross ---...--- From: shsc9801@condor.stcl...state.edu] Sent: Wednesday, December 23, 1998 8:04 AM To: (...) (26 years ago, 23-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | Re: motor port problem
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| you may have blown one of your L293D chips. try swapping the two chips to see if the problem then migrates to motor 1. if it does, then you have blown an L293D. there is more info on debugging motor problems in the FAQ. See the answer to "One of the (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | Replacing L293D with L298H
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| Hi Fred and others, I very desperate to debug the problem that took place in my HD. When I download the P_code, it is successfully downloaded. However, when the next instruction ask to reset the board, no words of sentence appear on the LCD. Only 16 (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | FW: change of address
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| -----Original Message----- From: Jaron Paludanus [mailto:j.paludanus@....a2000.nl] Sent: donderdag 17 december 1998 23:58 To: Fred G Martin Subject: change of address I'm not sure my previous mail came through but I have gone high-speed by cable (...) (26 years ago, 21-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | HD LCD problems
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| Hi FThompson, Fred and other, I encountered some problem in the downloading. I was successfully able to download the p_code into the HD. However, When the instruction proned me to reset the board,it always appears on the LCD without any lettering (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | Re: LCD configs (was:Suppliers and rf link)
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| john calhoun, Mine just arrived and they are 1 X 16 connectors. I ordered 2035TNLD/Y displays for $8.00 each. You might want to order now while they have the 2X16 displays with 1X16 connectors. I have soldered the connector on and tested it and its (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | RE: urgent request help !!!!
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| -----Original Message----- From: phillip chia [mailto:philchia@sin...et.com.sg] Sent: Friday, December 18, 1998 7:04 AM To: handybd Cc: Mr Peter Lim Subject: urgent request help !!!! Hi Fred and others, I very desperate to debug the problem that (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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fred
(score: 0.123)
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| | Please help! HD jammed !!!
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| Hi FThompson, Fred and other, I encountered some problem in the downloading. I was successfully able to download the p_code into the HD. However, When the instruction proned me to reset the board, it always appears on the LCD without any lettering (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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| | Re: Question for Fred
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| Hello this is mike, I am writing regarding the handy board. What happened was while working on the handy board, our motor control (the H-bridge) heat sink touch the metal chassis of our robot. This lead to one of the components on our H-bridge to (...) (26 years ago, 9-Dec-98, to lugnet.robotics.handyboard)
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fred
(score: 0.123)
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