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 | | Re: (IR sensors)
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| If you go to the following link: ftp://cher.media.mit.../cmcmanis/ You will find a file called ir.tar.Z which describes some software I wrote for a PIC chip that drove several LEDs and monitored three IR sensors (Sharp 1SU60s but could have as (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Re: Rob Gaunts Last Message
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| (...) the instructions are wrong -- you should be seeing about 9v, which is the voltage on the nicad pack. i will revise the instructions. thanks for pointing out the problem. fred (27 years ago, 22-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Re: expansion board schematic posted
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| Hi Fred The "new" spec sound's great ! I'd also like to see a bit more digital I/O on any expansion board, and the extra 8 CMOS outputs are just what I (we) need. Thanks Scott (...) Martin'" <fredm@media.mit.edu> (...) (28 years ago, 10-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Re: Board synch problem
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| two things you can try: 1. use DLM to download the CONFIG0C.S19 file. Make sure to use the -eeprom flag. This will cause it to burn the config register to the proper value. 2. Have you tried Randy Sargent's DL.EXE for DOS / Win 3.1 full screen DOS (...) (27 years ago, 20-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | dual servos
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| Good Day, A consensus seems to be emerging among those who know more about pcode interrupt structure than I. The printf function does indeed disable the interrupts and run that way for quite a long time. Thus, the servo twitching seems to be mostly (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | RE: dual servo update
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| Two things to note in the servo investigation: (...) This supplies a reserve of current to the servos, and that allows them to seek to their desired position faster. (...) Two servos, when moving, can pull two AMPS of current. Thats 2000mA. Two (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Re: Rob Gaunts Last Message
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| Whoa, i just realized that the instructions *are* correct. Here's why. For this voltage test, the instructions assume you are powering your board from the DC adapter. This should give the 15 volts mentioned, unless: * you hooked up the battery pack (...) (27 years ago, 22-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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fred
(score: 0.942)
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| | HB web site renovated!
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| Hi everyone, I've completed the HB web site's first major renovation, after about two years of existence. I'm pretty excited about the new look, which hopefully will serve the primary purpose of making information easier to find. it's there at the (...) (27 years ago, 26-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Reducing Battery Pack Voltage
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| Hi Fred I am attemping to run two low voltage DC motors (as motors 0 and 1), around 3V each(I don't have specs). I have piggybacked two of the motor driver chips (and maybe adding a third) to handle the higher current but they are still getting (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | memory not remembering...
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| I'm stumped. In the process of assembling my first handyboard, I have just reached the stage where I install the memory (all previous checkpoints passed). The computer successfully downloads the bootstrap, sets the config register correctly, and (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | HB site and 2.x web browsers
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| So all of my work is incompatible with version 2.x browswers, which don't colorize text. As an interim solution, I have created a site index page -- a single page that points to all pages linked from what are invisible menus if you have a 2.x (...) (27 years ago, 27-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.942)
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| | Re: Initial Download Problems
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| you easily could have blown chips if the vreg was shorted. then you're putting the direct batt voltage into the chips. just about any chip could be blown. sorry for the bad news! i'd try ordering the socketed parts from jameco and swap chips. fred (...) (27 years ago, 30-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.941)
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| | followup: Initial Download Problems
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| just to add a bit, the chips that can be bad if you can't bootstrap are the 6811, the RAM, the 'hc04, and the soldered-down 'hc373. If you have any easy way of swapping first 3 of these 4 these chips, try it. Fred (...) ? (...) co (...) (27 years ago, 30-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.941)
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| | Re: serial interface
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| Lisa you could also use the HEXMON40 program you might already be familiar with from the Mini Board. Basically all you have to do is change the motor out and vector location definitions. See the FAQ for the memory map of the Handy Board. (URL) your (...) (27 years ago, 30-Oct-97, to lugnet.robotics.handyboard)
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fred
(score: 0.941)
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fred
(score: 0.941)
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| | Re: Re[2]: phone cord length
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| Sorry Fred, but I must respectfully disagree..... Fred G. Martin wrote: (snip) (...) Actually it is phone cords which are the crossover type. Use of a patch- cord tester confirms this. I am not familiar with any RJ11 network cables, but I know that (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.941)
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| | RE: expansion board schematic posted
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| I've got one comment "balance". The expansion board adds 24 new inputs and only 6 new outputs. Perhaps I'm atypical but I don't need any more inputs to the handy board, I've got those aplenty, but I'm screaming for outputs to control other parts of (...) (28 years ago, 7-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.940)
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fred
(score: 0.940)
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| | HOW TO UNSUBSCRIBE
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| Greetings all, This is the periodic reminder about how to get yourself removed from the Handy Board list. The method is to send e-mail to Fred Martin. (That's me!) To unsubscribe, send e-mail to fredm@media.mit.edu. The message should say, "Please (...) (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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fred
(score: 0.940)
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