 | | 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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