 | | What a day.
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Well I wanted to demo my new robot it was cool, but the day did not turn out to well. I think I switched the phone cables. When I tried to connect my interface board with the HB, it would not run IC. I then tried to download a new PCODE_HR.S19, but (...) (28 years ago, 28-Jan-97, to lugnet.robotics.handyboard)
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| | (no subject)
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1. Is it possible to expand the 32K RAM of the Handy Board? If so, how? 2. We will be using two shaft encoders (HEDS5500 from Hewlett-Packard) for our project. How can we interface the shaft encoders to the Handy Board? What inputs do we use? Does (...) (28 years ago, 28-Jan-97, to lugnet.robotics.handyboard)
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| | Power Supply
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I'm using the 1.2 volt NiCad's wired in series to give me 9.6 volts. If I want to get rid of one or two of the batteries, will the handyboard still run at 7.2 or 6.0 volts ? What is the minimum voltage that the handyboard will run on, 5V ? I dont (...) (28 years ago, 27-Jan-97, to lugnet.robotics.handyboard)
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| | Unsubscribe
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Please drop me from the list. I can't handle the volume. Ken Owen (28 years ago, 27-Jan-97, to lugnet.robotics.handyboard)
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| | as11
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Can anyone tell me how to get the Motorola freeware assembler for the HC11, to run on a PC? Thanks Richard Whitehead (28 years ago, 27-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Mobile Robots book
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I recieved my copy in a special deal from a book club that catered to electronics enthusiasts. It was a kind of Book-of-the-month club. The name escapes me at the moment. Anyway, you got to choose 3 books for like $5. Then you just had to buy one (...) (28 years ago, 27-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Vector 2x again
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(...) You'll need 3 input and 2 output lines. One input and two outputs are available at the SPI port, (right side of board, J6?). Find two more discrete inputs on the Handyboard and you're set. All the other inputs on the V2X can be hardwired high (...) (28 years ago, 27-Jan-97, to lugnet.robotics.handyboard)
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| | Vector 2x again
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I know this topic has come up time and time again, but from all the previous postings I still am unsure of some things. First of all has anyone be able to get the vector working *without* using any other microcontroller board (using only the (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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| | Re: -POWER-GLITCH-
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Make sure your downloader is configured to download "pcode_hb.s19" and not any of the other variants (eg pcode_r22.s19). Avard, please send me an email and let me know if this solves your problem. -Fred In your message you said: (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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| | Re: memory not remembering...
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Ben -- the pin 27 R/W line of the RAM should be connected directly to the R/W line of the 6811. I don't remember the pin # off hand -- it's 7 i think -- but just check the schematic. check the continuity first on the board. if that's ok, then check (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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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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| | -POWER-GLITCH-
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My handyboard is experiencing some kind of a -POWER-GLITCH-. At least that's what is displayed just before the board shuts itself off. How did this happen, and what can I do about it? Thanks in advance. Avard Fairbanks (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IC loop
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(...) There are a number of ways to do this in C. If you get the code that comes with the Handyboard, they have msleep(500L); which sleeps for 500 milliseconds (L for LONG Integer) and then returns to the calling program. My code is at work, but I'm (...) (28 years ago, 26-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Mobile Robots book
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(...) True. I ordered one, then another a few weeks later at $4.95. About two months ago I tried to get five and they were out of stock. They won't post their phone number and it isn't included in their newspaper-like catalog that I now get every (...) (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | IC 3.1
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Has anyone used IC 3.1 yet and does anyone know when it will be available for Windows 3.11 or win32? Thanks. Keith Soldavin kas219@email.psu.edu (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Mobile Robots book
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(...) Yes, Edward R. Hamilton Booksellers has been sending me thier list periodically now and I never saw the Mobile Robots Book in it. I guess it's a good chance that they probably will not restock it. (...) (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | 8MHz crystal
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The 8MHz crystal is no longer listed in the Mouser Catalog (part #332-5080). When I look in the DigiKey catalog, it lists several 8 Mhz crystals with different load capacitances (18pF, 20pF, 32pF, and Series). Does it matter which I get? If so, (...) (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | Mobile Robots book
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Hello: Sometimes back there were posts here that the Mobile Robots book could be obtained from a bookseller in CT for $5! However, later appends said that this booksellers stock was exhausted. Are there any other discount book sellers around? (...) (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | thanks
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This is just a quick thank you to all those who replied to my plea for book information. I'm on the right track now. Gracias! Dave (28 years ago, 25-Jan-97, to lugnet.robotics.handyboard)
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| | books
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Hi all, What is the best way to get my hands on a copy of Mobile Robots: Inspiration to Implementation? My local book vendor wants me to wait two months for it. I'm hoping to find a faster solution. Thanks, Dave (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Please subscribe me to the handy board mailing list. Thank you very much. Michelle Conway ***...*** * Michelle Conway * wake up late and honey put on your * * Doyle 213 * clothes and take your credit card * * x3343 * to the licquor store, well (...) (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | (no subject)
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You are unsubscribed. For future reference, the way to unsubscribe is to write to me. fredm@media.mit.edu. -Fred In your message you said: (...) (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | LM052L LCD Display
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I have just had no success at all finding this part in the UK. I even talke to Hitachi UK and was told that if I wanted any it would have to be 100+ with a 20 week lead time! Now, I have an alternative fitted and working so there is no desperate (...) (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | bipolar steppers
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Suggestions Anyone???... Was wondering if anyone has an alternate solution to stepping a bipolar stepper? Currently.... I'm using an H-Bridge (driver if you will) SAA1042 (by Motorla) which is then getting its pulses from 1 of the motor outs on the (...) (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Can anyone tell me how to unsubscribe from the handyboard mailing list? thank you in advance, Zlatko Horvat (28 years ago, 24-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Problems with downloading
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Tom: Your tests, specifically the fact that the HB's PWR LED comes on after download fails, demonstrate conclusively that the HB can *receive* data from your PC. This proves that the downloading software is able to open the serial port properly, and (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | Problems with downloading
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I'm trying to download the pcode_hb.s19 file to the handy board and I'm having a very hard time. I using win95 on a P5 and 200mhz. I setup the com port settings at 110 and no data flow. When I run the hbdl program and try to download the file I get (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | RE: dual servo update
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(...) I use Futabas. The 32.768 mS interval is convenient because the 68HC11's 16-bit timer on a 2 MHz clock overflows at that time, allowing easier programming of the TOC functions. Has anyone found the upper limit on the time interval for Futaba (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IC loop
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Hi Wade, You can use the "seconds()" function which reports elapsed time, plus a variable to keep track of when the loop should end: void main() { float end_time; end_time= seconds() + 20.; /* go for 20 seconds */ while (seconds() < end_time) { /* (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | IC loop
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Hope someone can help, I have just written my first code for my bot. All I have done so far is make my bot go forward in about a 4 foot square area. I am now wanting to put a loop in the code so that it will continue for a certain length of time or (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | bipolar steppers
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Was wondering if anyone has an alternate solution to stepping a bipolar stepper? Currently.... I'm using an H-Bridge (driver if you will) SAA1042 (by Motorla) which is then getting its pulses from 1 of the motor outs on the Handy Board. The (...) (28 years ago, 23-Jan-97, to lugnet.robotics.handyboard)
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| | RE: dual servo update
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Mike writes : (...) The limit is specified by the product manufacturer. Futaba servos don't guarantee they will hold unless they see a pulse every 20mS. The Tower Hobbies servos are a bit more lenient. If you have the servo manufacturers data sheet, (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | Re: LCD screen
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(...) I ended up with a display that did this very thing (A Rolm display I think), and what I did was to cut the contrast lead coming out of the LED connector, and then solder a 20k pot to the GND, +5V, and Contrast leads so that I could vary the (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | Re: LCD screen
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Garth The contrast of the LCD can be adjusted. The third pin from the left side of the LCD, labeled VR on the HB is the contrast adjustment. You can cut this pin from the male header than connects to the HB. Solder a small trimmer pot with the wiper (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | Re: LCD screen
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I have seen cases where an LCD display was destroyed by excessive heat. I used to be in a car rallye club, and we had several timers destroyed by being left in a hot car. Could your board have been exposed to high temperatures during your travels? (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | Handy board use in Micromouse
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Hello, I am new to this group, so I may be repeating previously answered question. I wanted to know if anyone has looked into using the handyboard for building a Micromouse. Comments on their experiences and ideas would be appreciated. Tejesh (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | LCD screen
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After turning on my handy board after some traveling with it (and loading IC, etc) I have found that the contrast of the screen is very high. If looked at straight on the screen looks black (well, all black squares), but if looked at from an angle, (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | RE: dual servo update
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(...) I send my servos commands every 32.768 mS, and they work fine. I don't know what the limit is, but I don't think that 20 mS (50 Hz) is critical. * Michael L. Ross/C33 | Lockheed Martin Eng & Sci Svcs Co. **** * Robotics Department | 2400 Nasa (...) (28 years ago, 22-Jan-97, to lugnet.robotics.handyboard)
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| | Sharp IS1U60
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hi everyone, i bought 8 sharp IS1U60 IR detectors from Sterling Electronics.. (refernce "mobile robotics-inspiration to implementation) They have a $25 minimum purchase, the parts are reliable and are still working well for me. They cost $3.25 a (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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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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| | Re: Twitchy servos
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(...) I'm using a 80C32 board and control two servos by generating a PWM signal with a timer interrupt. It frequently happens that the servos twitch. In my experience the period of 50 ms of the PWM signal was too great. The problem disappeared when (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | MEMORY FAULT
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When I turn my HB on I get the message "MEMORY FAULT" what does it mean and how do I fix it? Thanks, Peter Eacmen (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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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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| | Stepper Motors driving [DAT]
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Hi - I am new to this list but the archive indicates some interest in driving stepper motors on the HB so here is my little bit: If we have a typical four coil, unipolar stepper such as those found in disk drives, they will have connections (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator
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(...) I'll post this again: 4 sharp GP1U58Y: 40KHz IR Receivers for $12 From page (URL) them at mek-orders@orlandone...igital.net These are compatible with the IS1U60 as far as i know. I ordered 4 of them and they were shipped to me in the (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | Re: dual servo update
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Hi, I spent a bit of time a couple of months ago re-arranging a lot of the Pcode (we all get our kicks different ways!). At that time, I concluded that the printf routine (or more specifically the despooling function of the buffered characters going (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | Re: addendum
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Ahah. due to the arcane way printing to the lcd screen is implemented, all interrupts must be turned off each time a character is written to the lcd. apparently this conflicts with the servo routines. i'll look into it and see if there is a (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | addendum
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Hello again, I forgot to include the most interesting part of my findings. Removing printfs from my routines (which I did independently from all other fixes) markedly improved performance of the servos. This is actually one cause of trouble which I (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator
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I too am interested in getting the Sharp IS1U60 but have not been able to locate it. Scott sherman@plains.nodak.edu (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | dual servo update
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Hi, For any interested dual servo users the following is what I have been able to find regarding the twitching. Wiring a 1000microf electrolytic across the 6V within inches of each servo seems to work. However, a much more important fix has been (...) (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | IR Demodulator
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Hello Everyone, I have had absolutely no luck in getting a IR Demodulator for my HB. I have tried every source given on this sight and even more. Can anyone help me to locate this part? Sharp (IS1U60) Having No Luck! Bill Rose (28 years ago, 21-Jan-97, to lugnet.robotics.handyboard)
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| | Re: mosfet H-bridge
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I would also be interested in plans for such an H-Bridge. I have two 12Vdc motors than take 3.5 Amps at full load (actually gearhead motors so I get lots of torque @50 RPM) but they have surges us to 12 - 14 Amps at start-up and if they get stalled. (...) (28 years ago, 20-Jan-97, to lugnet.robotics.handyboard)
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| | RE: mosfet H-bridge [DAT]
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Sure, I've built several. The only "trick" to MOSFET bridges is that if you use all N-channel FETs you need a charge pump on the upper FETS. (look out for typos, this was done 'off the cuff' so to speak.) Chuck's Simple MOSFET Tutorial ---...--- (...) (28 years ago, 20-Jan-97, to lugnet.robotics.handyboard)
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| | mosfet H-bridge
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Hello, does anyone know how to build a mosfet hbrige and, if so, could they pass that on to me? It is my understanding that the mosfet hbridge does not heat up near as much as the transistor hbridge nor does it have any loss of voltage or current (...) (28 years ago, 20-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Sensors
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(...) Voltage. (...) Yes. (28 years ago, 20-Jan-97, to lugnet.robotics.handyboard)
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| | More Sensors
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What is the smallest difference between voltages that the HB can differentiate between at its analogue inputs.I am very grateful for the information which has already been supplied in reponse to my queries and have found it useful though not (...) (28 years ago, 19-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Robot Soccer Teams
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Perhaps someone can post it on their HomePage or something so that we all can read it. :) (...) (28 years ago, 19-Jan-97, to lugnet.robotics.handyboard)
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| | Twitchy servos
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Hi. I also have the problem of twitchy servos, but I am currently only using one of them. The servo is used in steering and it constantly twitches. Although, when I have nothing else hooked up to the board and have only the servo running, no twitch. (...) (28 years ago, 18-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Ranging
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(...) The Polaroid sensor (50-60 KHz, 1.5-30 feet but maybe more from the air?) is $49 (minumum two) direct from Polaroid. They are in the FAQ or I can look up the ordering stuff if you are interested. There is plenty of documentation for using the (...) (28 years ago, 18-Jan-97, to lugnet.robotics.handyboard)
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| | Robot Soccer Teams
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I just read in Nuts & Volts about your triumph!! What an impressive feat! Doesn't it get boring having your robots beat the competition 15 to zip? Just kidding.. I can imagine the excitement you all must have felt to see your creation take off seem (...) (28 years ago, 18-Jan-97, to lugnet.robotics.handyboard)
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| | Re: dual servos
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Hi, Richard wrote: - but I just read yesterday on a web page that servos want a signal (20 ms = ?? degrees) every 50 milliseconds or so Right concept, wrong numbers. Servos want to see a pulse about once every 20ms. The pulse should be in the range (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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| | Sensors
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Would someone be able to tell me whether the analogue inputs on the HB are sensitive only to voltage or to current.I would also like to know whether or not I could recieve sensor input on more than one analogue input simultaneously and make the HB (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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| | RF communcations
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--text follows this line-- Check out the network section on (URL) the various options Thad Starner MIT Media Laboratory Wearable Computing Project (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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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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| | dual servos unstable?
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(...) Try running the two-servo code, but unplugging each of the two servos, in turn. One servo plugged in to the two servo code should narrow down whether this is a software or power problem. If it only jitters when both are plugged in, I'd (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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| | dual servos
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Hello world, To richardv@abac.com, I am eagerly awaiting your results. To joe.doubek@privy.com, I'll keep you posted. So far I have gotten to the stage of pretty well ruling out input noise as the cause of twitching servos. I have almost identical (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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| | Re: dual servos
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I'm a newbie at this, but I just read yesterday on a web page that servos want a signal (20 ms = ?? degrees) every 50 milliseconds or so, and if you stop sending the signal, they "go limp" and don't "hold" position tightly, but are deenergized and (...) (28 years ago, 17-Jan-97, to lugnet.robotics.handyboard)
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| | capacitor question
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I was just wondering about this - are you supposed to heatsink capacitors when soldering? My gut feeling says "no", except that my ECE TA seems to disagree. Any thoughts on this? (Sorry, this doesn't have too much to do with the handy board - (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: power and servo
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[problem 1: voltage on motor chips when no motor voltage applied] This is normal, because the motor chip INPUTS have +5v signals on them. These signals "bleed" into the motor chip power supplies. This isn't dangerous, but it isn't particularly good (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | IR Demodulator
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Hello Everyone, I have had absolutely no luck in getting a IR Demodulator for my HB. I have tried every source given on this sight and even more. Can anyone help me to locate this part? Sharp (IS1U60) Having No Luck! Bill Rose (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: (BrainDead)
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Dear Jim, In your IC distribution, there should a file called servo.lis. Make sure you have it, and add the following line to lib_hb.lis: servo.lis The *.lis files are kind of like include files, and will cause IC to load any files listed in them. (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | unsubscribe
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unsubscribe (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | unscribe
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Please unscribe "tdk@utrillo.wustl.edu" from the mailing list. Thanks. (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | HB ni-cad battery pack
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I located a 9.6 volt 700 or 900 mah battery pack at Radio Shack and the one on the parts list is just 500 mah. My question is, will the charging circuit work ok with either of the above battery packs from Radio Shack? Thanks Bill Rose (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | power and servo
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Hi everyone, I've got two problems that I hope your combined expertise can solve. 1) I cut the trace connecting the the motors to the main board supply, so that I could power them independently (as per the instructions I found on the web). The board (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | step motor interface & control
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For anyone interested in using step motors: I have found a way to use them - Pull out the L293's chips, replace the y6 clk signal on the motor latch with y4, then pokes to 0x6fff will allow you to send bit patterns for 2 unipolar 5 or 6 wire (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: 100 sensors
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Joe, A very handy way to connect lots of digital switches is to arrange them in a resistor ladder and connect them into an analog input. You could get up to 8 switches into one input, giving you 256 different voltage levels, in theory, but in (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR wall detection
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(...) Keith I think it works. I managed to get a bread boarded version of the IR sensor working. A 555 provides a 40khz carrier. The 555's reset pin is directly tied to pin 5 of a 567. The carrier is modulated by the internal freq of the 567. A (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | 100 sensors
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I am interested in sensing with about 100 water activated switches and am wondering if this is at all possible with the Handy Board.I had thought that it might be possible to by making them all return different levels of current at the sensor input (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: LM629 and "quadriture incremental" encoders
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James, That's probalby my post you read. I'm still working on hooking 'em up. I'm gonna use two 629's and two 18200 H-bridges. The 629 uses encoders simmilar to the ones in mobile robots. The quadrature encoder has two signals that are 90 degrees (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR wall detection
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Keith, Try an LM567. It's a tone decoder with PLL and VCO. Basically set the internal freq. of the 567 any where between .01 Hz up to I think 500 kHz. Feed a signal into the 567 and if the freq's match up, the 567's output goes low. I've been (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: dual servos
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There may be two separable issues in your experiment: 1. "twitching" when the control value isn't changing. this should not happen. 2. twitching because of flakiness in the pot reading. this would not surprise me at all. if the A to D reading on the (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: unsubscribe
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Please unsubscribe "vie100@psu.edu" from the mailing list. (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | RE: LM629 and "quadriture incremental" encoders
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The last time I priced these chips they were $249.00 each qty 1. (a bit expensive for my robots, but I've used them and they are cool) --Chuck ---...--- From: James Lewis[SMTP:jlewis@nomadics.com] Sent: Wednesday, January 15, 1997 5:10 PM To: (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | LM629 and "quadriture incremental" encoders
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I was reading through the mail archive last night and was struck by a message someone sent regarding the LM629 motor controller. It seems as though this is a really cool chip! I requested some samples and they are on the way. My question is this, I (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | dual servos
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Greetings all, I have been programming lately using the recently released dual servo routines. I have noticed that if I enable both servos and simply send each of them a pulse (servo_a7(or 5)_pulse=3040 for example) they respond faitfully but then (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: (BrainDead) servos
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Please see the Servo page, linked off of the Software Resources page: (URL) you load the drivers, and connect the servo to power, ground, and a control output. -Fred In your message you said: (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Re: (BrainDead)
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(...) there 's one little mistake here.. you do not only need the servo.c file, but also the servo.icb file...So first you have to load the servo.icb file an then the servo.c file to get the thing working... Now you can use the servo commands as (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | (BrainDead)
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I'm kind of stuck, and hopefully someone can tell me what I'm doing wrong. My group and I have been working with the HB for a couple of weeks now and have progressed to the point (in programming the HB) where we've written programs utilizing muliple (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | (IR sensors)
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Can some give me a suggestion as to what kind of IR sensors would be good to use in conjunction with the Handboard on a mobile robot. I remember seeing some info on Sharp IR modules...and if I'm not mistaken, the posting mentioned that these IR (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | (2 sensors)
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Tom, With regards to your writing the program that compared two sensors...may I ask what specific sensors were you using? or had in mind?? Jim Tegarden (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | HB ni-cad battery pack
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I located a 9.6 volt 700 or 900 mah battery pack at Radio Shack and the one on the parts list is just 500 mah. My question is, will the charging circuit work ok with either of the above battery packs from Radio Shack? Thanks Bill Rose (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Long Distance Communications
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RF modems. These are 9600 baud and up serial links with just that range. Cost tends to be $500 per. I don't know of any brands I can recommend off-hand. Try a net search? -fred In your message you said: (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Long Distance Communications
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How Can I communicate between handy boards over long distances,cost effectively and wirelessly.I would like to communicate over distances of several miles. Thank you, Joe Martin joema@mpx.com.au (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Pins Y0-Y5 addresses
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Info on how to use these pins is explained in the Appendix B of the 6.270 manual. The HB and the 6.270 have the same memory/digital I-O circuitry. Look in the Tech Docs link off the main page. -Fred In your message you said: (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | You know, I just had a wacky thought...
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Rememeber all those MOSFET stereo ads in the back of Pop Electronics et al? I got to thinking about it today and wondered if they wouldn't make a cheap and easy motor controller? Sometimes the modules are dual channels, but essentially all they are (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Pins Y0-Y5 addresses
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Hi, I need to access the pins labelled Y0 to Y5 on the expansion bus. I wasn't able to find the addresses for these pins on the HB web site. Does anyone know these addresses or can someone direct on how to find them? Thanks, Maria ---...--- Maria (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Ports on Windows NT
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Dear Chris, The reason that the downloaders don't work with NT is probably due to the fact that NT has a hardware abstraction layer, and requires special code to access it. I don't think either HBDL or IC has this code. As far as the Win 3.1 goes, (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Ports on Windows NT
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Hey folks, I can't get my HB downloaded on my dual Pentium Pro running Windows NT (3.51). Anybody done this? HBDL complains that none of the COM ports are available, and my event log claims conflicts occur between COM ports (managed by SERIAL) and (...) (28 years ago, 14-Jan-97, to lugnet.robotics.handyboard)
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| | Strange.....
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Today I was at The Computer Museum, Boston, presenting The Handy Board, and non-commercial controlers called Crickets. The HB was working fine, but one time I turned it on. It diplayed: "IC v3.1 Bet" an the heart stopped beating. It seems as if it (...) (28 years ago, 14-Jan-97, to lugnet.robotics.handyboard)
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