 | | Grounding robots
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(...) By ground, I just meant the HB ground. The important thing is just that everything in an electronic system share the same ground; voltages are relative, and the ground is just the shared reference point--the point arbitrarily defined to be (...) (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | Continuous charging
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Graham, J. Todd wrote: <snip> (...) If you use zap charge mode, you'll end up cooking your batteries unless the HB draws just the right amount of current. If you use any motors or other high current devices connected to the HB, trickle charge mode (...) (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | help again
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thanks to the immediate responses from the mailing list I was able to remove the connector bug from my handy bosrd and now my interface board is complete. But the handy board does not enter the download mode The sitution is as follows: Once I (...) (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | RE: gpu5x??
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Step 8.2.1 of the Handy board Assembly insructions has code that lights a motor port LED when a TV remote is aimed at the infared demodulator it says to type the following at the IC prompt: while (1) {if (4 & peek(0x1000)) fd(0); else bk(0);} (...) (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | Capacitors Voltages?
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May I know the voltage of the capacitors for the Handy-Board partlist. Or where can I find out (web site)? Thank u. (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | Re: CD-ROM used as Audio CD player
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Never done it before, Alf, but here are a few hints. First off, learn about the IDE interface. These CD-ROM drives are cheaper than SCSI. Also, try to find source code for a CD player on-line, and examine it to see how it works. Last, why not just (...) (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | Re: gpu5x??
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Hi I have those infrared sharp devices "Gpu5x or something like that" how can I get it to light an led when it sees the transmitting infrared led? A schematic or page to go to would be much appreciated ! thanks -Mike (26 years ago, 16-Jan-99, to lugnet.robotics.handyboard)
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| | Re: RESEND--Re: Help with Power Scheme, Please...
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Thank you for your help :) Just one more questions, please... How can I ground a mobile robot ? Best regards, Andre. (...) | (...) | (...) | (...) | (...) |------+ (...) ===...=== Andre Philippi - Applications Developer | Phone: 626-296-5016 (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Motor output LED
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Hi all! I got a question. Whenever I connect the motor outputs to a scope (I wanted to read the output of the HB), the LEDs light up even with the output off (ao())... Can anyone explain this to me? Thanks. Keith (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | RE: RESEND--Re: Help with Power Scheme, Please...
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In the example, are there any advantages or disadvantages in using a voltage regulator (such as a 7805) to dropping the voltage from 12v to 5v as opposed to using a diode string? Also, I guess no one had an answer on the earlier question of running (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Scrolling through the LCD messages by the knob
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Simon, This shouldn't be too difficult to create...but it could be a real waste of memory unless it is real important issue. The reason why is that you would have to save the messages in memory. You'd have to decide if you wanted to fill all the (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Scrolling through the LCD messages by the knob
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(...) Yes, and it is totally trivial to do so. I don't have my sources here at the moment, but it is roughly like this: c = readknob(); /* or whatever the cmd is for reading it */ if ( c < 64 ) { print "a"; } else if ( c < 128 ) { print "b"; } else (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | RESEND--Re: Help with Power Scheme, Please...
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I apologize for having sent the following with extra line-feeds in it; Here it is again: The main problem I see is with how you label the voltages at various points in the circuit. If you have a 12 V battery, the low voltage end is usually called (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Scrolling through the LCD messages by the knob
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Hi, i am looking for a program to use the knob for scrolling through messages. i really need this, because i have to output more than 32 chars (and there isnt enough space for a larger display ). i have read about using the knob for scrolling on the (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | UCOS
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Has anybody tried to use HB with the ucos (the real time OS developed by Jean Labrosse)? Thanks. Aldo Gentile aldo@lacapital.com.ar (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Help with Power Scheme, Please...
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The main problem I see is with how you label the voltages at various points in the circuit. If you have a 12 V battery, the low voltage end is usually called zero volts and the high voltage end is called +12 volts (although the numbers are just (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | HBL: EPROM Microcontrolers
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FROM: Cesar Mello / cmello@cpovo.net Hi friends, Sorry if this subject isn't much related to the Handy Board, but I'd like to know something about the HC11 Eprom based microcontrollers, like the MC68hc11a8p. Does it have any means of booting from (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | HBL: EPROM Microcontrolers
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FROM: Cesar Mello / cmello@cpovo.net Hi friends, Sorry if this subject isn't much related to the Handy Board, but I'd like to know something about the HC11 Eprom based microcontrollers, like the MC68hc11a8p. Does it have any means of booting from (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Mobile robot QT demo in my HP
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I have Quick Time movies of my robot going about life! visit: www.cooper.edu/~mar Background: As a Masters student I created a mobile robot using the Handy Board. Many of you may remeber me bugging you with questions. :) Well, that all payed off and (...) (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | CD-ROM used as Audio CD player
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Hi, I'd like to control an IDE or SCSI CD-ROM with my HB in order to play audio CDs (ff, rew, shuffle etc.). Did anybody do that before? I'll appreciate any hint! Best regards, Alf (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Clearing the LCD
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I've always used printf("\n\n"); hope it helps! --philsky (26 years ago, 15-Jan-99, to lugnet.robotics.handyboard)
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| | Help with Power Scheme, Please...
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Hi Everybody, I'm trying to hook-up the Handy Board, an R/C car chassis, and a wireless camera together, and here's what I was planning to do about the power... +---...---+ +---...---| Handy Board +------+ | +12v +----+-----+----+ | | +---...---+ | (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Re: TI SN754410
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Try here: (URL) luck, - - - Nick - - - (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Re: TI SN754410
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(...) I don't know of a supplier for the SN754410, but the originally specified L239D is readily available from: Maplins (code No. AH80B) for 3.99 UKP inc VAT, or Farnell (code No. 699809) for 5.04 UKP + VAT Both of these companies have UK websites. (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Clearing the LCD
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Hi everyone, Quick question! What's the IC command to clear the LCD? Thanks for the help in advance. Bill Denzel Senior Mechatronics Student California Polytechnic State University San Luis Obispo (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | FingerBoard Users?
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I want to add a minimal board as a slave to my HandyBoard. My choices seem to be the FingerBoard, MiniBoard, and BOTBoard. At this point the FingerBoard is my first choice. Is there anyone here who has used this board? Any comments? Pros and cons of (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Help with cables
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milind, To check your phone cord, hold the ends together so that the wires are away from each other. Look through the clear connector. The wire colors should line up in this orientation. There is a little more to the DB-25 issue. "Null modem" vs. (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | assembling the pcode
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hi i've recently modified the pcode.asm file to make the timer interrupt occur at 2KHz, rather than 1KHz. does anyone know how i'm supposed to assemble/compile this pcode.asm file into the pcode_hb.s19 file that will be loaded into the Handyboard? (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Re: TI SN754410
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(...) If you can't find the TI chip try doubling up on the L293D by piggybacking them on top of each other for added amps. You can use one L293D with an additional L293 on top of it (the 'D' has protection diodes that you MUST have). You may need to (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Help
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thank you for the apt and quick reply. if you could tell us what is the difference between a straight through cable and a null modem cable it would be great( we are using a 25 female to 25 female connector) and how to identify the difference between (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | (no subject)
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Dear Friends, We, at VESIT ,Bombay,India are making a rover which is capable of navigating itself and avoiding obstacles.For this,we are using the handy board.The soldering work has been completed and we are now trying to use 'download software' (...) (26 years ago, 14-Jan-99, to lugnet.robotics.handyboard)
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| | Serial interface
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Re Serial interface problems in Bombay When I assembled the inteface board, I made the mistake of putting a male connector on the interface board. I had the same problems as you and this turned out to be the obvious cause.... so double check all (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | Digital troubles
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Hi all, I am assembling a handyboard and things have gone well until I got to the section 7.1.1 in the assembly manual. I assembled the digital inputs, and when I used the function testdigitals(), the start button is the only one that will register (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | troubleshooting
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The interface charger board is soldered and the max232 chip has been tested works perfectly and the green led SER glows on shorting the pind of max232 and the J3 socket. But when the host computer is connected and the proper downloaded is connected (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | Re: serial interface trouble
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SHETTI.NITIN.MANGESH wrote: <snip> (...) The most common problems seem to be with the types of cables and the serial port settings. Make sure that you are using a straight through cable (not a null modem cable) to connect the HB to the serial port, (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | RE: interface problem
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This can take a long time. Start by making sure that the cable is correct. You can do this by changing the Rx and Tx lines. If this does not help de Maxim serial driver can be faulty. Last check the solder joints.I once looked at them and could not (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | Radiometrix address
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Radiometrix Ltd. is at lemosint@ma.ultranet.com Contact Danny Lemos 508 798 5004 ___...___ Chad Pennebaker, President mailto:chad_pennebak...ouglas.com ** Creators of the Douglas CAD/CAM System for Macintosh PCB Design ** Douglas Electronics, Inc. (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | Re: Wireless Handyboard Link ?
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I obtained the RF wireless kit ( HP Series ) from Lynx Technologies a while ago, and I have not had any success yet. My guess is that the handyboard is unable to "Synchronize with the board" with the half- duplex communication provided by the kit. I (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | GP2D02 Interface Question?
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Attached below is IC code for a GP2D02 rangefinder. This is a slightly enhanced version of code from Bjorn Astrand. My question relates to the use of TMSK1 in the code. From reading various M69HC11 documents, I think (???) that I know what bits are (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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| | Downloading problems
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The other day I posted to this board that I was having downloading problems with a HB which once had none. Simon very kindly E-mailed me reminding me about the proper phone cable. Seeing he was the only one-I-by necessity have become an expert. (...) (26 years ago, 13-Jan-99, to lugnet.robotics.handyboard)
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