 | | Re: Smooth PWM Routines!
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(...) Was the pcode source for the final version of IC 3.1 ever released? Afaik, only pcode 3.1 beta is available. ---...--- Jeff Keyzer UCSD EE Major jkeyzer@ucsd.edu (URL) (27 years ago, 4-Dec-97, to lugnet.robotics.handyboard)
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| | Re: Smooth PWM Routines!
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(...) the pre-built pcode is for 2.8x, but sources are provided so someone could build a version based on 3.1. -Fred (27 years ago, 4-Dec-97, to lugnet.robotics.handyboard)
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| | Re: Smooth PWM Routines!
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Is this a replacement for the IC3.1 p_code, or just for IC2.8x? Jun Nolasco nolasco@inx.net (...) (27 years ago, 4-Dec-97, to lugnet.robotics.handyboard)
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| | Re: Replacement for ZTX614 NPN Darlington Transistor
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I just joined the list, and saw in the list archives the recent question about a replacement for the ZTX614 Darlington. On my Handy Board which just arrived from Patrick Hui, the supplier in Hong Kong, a few part substitutions had to be made, which (...) (27 years ago, 3-Dec-97, to lugnet.robotics.handyboard)
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| | Remove LCD?
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Is the Handyboard supposed to work with the LCD display removed? When we try that with our Handyboard, it just beeps repeatedly. Any ideas on why that might be happening? Is it possible to modify the software so that the LCD display can be removed? (...) (27 years ago, 3-Dec-97, to lugnet.robotics.handyboard)
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| | Smooth PWM Routines!
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Julian Skidmore <skidmorj@cs.man.ac.uk> has implemented and released a new algorithm for performing the pulse width modulation on the Handy Board's motors, allowing up to 100 power steps rather than just eight! This is a big, big improvement over (...) (27 years ago, 3-Dec-97, to lugnet.robotics.handyboard)
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| | Penn State Robot contest
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Hi, Penn State Abington College (Abington, PA; Phila area) will be hosting the 3rd annual "Robo-Hoops" autonomous robot contest on Sunday, Dec 7, 1997 (1-3pm). Robots must pick-up and dunk or shoot Nerf balls (4" diam) into a net positioned 12" (...) (27 years ago, 3-Dec-97, to lugnet.robotics.handyboard)
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| | Sortie Vidio
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Hello all, Can we used the video output to guide an extern system? Salut tous, Peut-on utiliser les sorties vidéos pour commander un système extérieur? Frechn Student... By (27 years ago, 2-Dec-97, to lugnet.robotics.handyboard)
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| | Re: IC with other boards
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(27 years ago, 2-Dec-97, to lugnet.robotics.handyboard)
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| | IC with other boards
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Is is possible to run the freeware IC with the BotBoard II? (How?) Also, what is the difference between the RugWarrior version of IC and the Handyboard version? -- Justin Kao <jkao@bigfoot.com> <jkao@compuserve.com> (27 years ago, 1-Dec-97, to lugnet.robotics.handyboard)
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| | PCBs in the UK
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Hello, This is a note for people in the UK. I just ordered 2 sets of handy board PCBs from Colin Barnard of Miranda Robotics. The boards arrived quickly and appear to be good quality boards. -Jeff Loeliger r12110@email.sps.mot.com (27 years ago, 1-Dec-97, to lugnet.robotics.handyboard)
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| | Re: IC problem
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(...) Alright, I have isolated the problem a little more since last time. It turns out that when I put my finger over a certain area of the solder side of the board, I can run IC perfectly well. The area is right around pin 22, 21 and 20. I believe (...) (27 years ago, 1-Dec-97, to lugnet.robotics.handyboard)
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| | Re: Smoking serial/charger board...!!!
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Hi. This evidence pretty conclusively points to a power-ground short on your board. Here is why: * you are fairly certain it is not the RJ11 cable (the most common cause of blown R11's). * when applying charge pwr directly to the HB's charge jack, (...) (27 years ago, 1-Dec-97, to lugnet.robotics.handyboard)
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| | Re: IC problem
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Jeremy, You have to give us more information about what you've tried. Have you re-downloaded pcode_hb.s19 to your board? Do you get the boot beep and LCD message when you turn your board on? Have you changed your desktop computer configuration at (...) (27 years ago, 1-Dec-97, to lugnet.robotics.handyboard)
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| | Re: IC problem
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(...) Hi Jeremy, My board does that sometimes too. Are you useing the same telephone cable? Make sure all other programs are closed on your computer. Reset the board by turning it off and then back on. Good luck Terry (27 years ago, 30-Nov-97, to lugnet.robotics.handyboard)
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| | Robotics club in the Los Angeles area.
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Does anybody know of a club in the Greater LA area. The only one I've found so far is over an hours drive away. Any info would be helpful. Thanks Mike (27 years ago, 30-Nov-97, to lugnet.robotics.handyboard)
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| | IC problem
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Hi guys, I know that this exact question came up once before in this newsgroup, but its reply has long since gone to the bit bucket in the sky, so forgive me. Anyway, I can get the following message on my handy-board: Interactive C V 2.81 9/28/93 (...) (27 years ago, 29-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Smoking serial/charger board...!!!
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I am having a similar problem (see notes below) - R11 is burning on the serial/charger board. My HB had been on the shelf for a month or so, and it may have been left on AND I had made the motor-power hack (I tapped the center of the battery pack to (...) (27 years ago, 28-Nov-97, to lugnet.robotics.handyboard)
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| | LCD Connector?
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Hello to ALL, I was wondering if the LCD connector could be used to connect a speech board from RC Systems. Could I unplug the LCD module and use the plug ins for the board w/ an additional power source for the board? Thanks, Randy Eaton (...) (27 years ago, 28-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Replacement for ZTX614 NPN Darlington Transistor
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(...) I am currently arranging a supply of the ZTX614, when they are available I will post the price to the list, hopefully early next week. I also supply the Handyboard in the UK at £19-50 for the set (main board and charger/if) including first (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | The frequency of a digital input...
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Hello all, What is the maximal frequency that we can put on an digital input of HB? French Studant... By, and thanl you... (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board PWM Routines
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(...) <snip> LDAA speeda ; rotate bits in motor speed ASLA ;Rotate the speed bitmask one bit position. BCC SPDoffA ;Did we set the carry flag by shifting a "1" out ; of the MSB of the register? ADDA #1 ;We pushed a "1" out of the register, better ; (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | HB sonar new drivers
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the new code is improved in the sense that 1. there is a clear schematic and wiring diagram; 2. it does not require the removal of a motor driver chip; 3. all driver code is written in Interactive C. fred (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Handy Board PWM Routines
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I've recently been implementing a PD controller on the HB for use in a line following robot, and have been having some problems with instability, especially around the zero point. I was beginning to suspect that the 8 levels of PWM in the HB library (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 stuff
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What was wrong with the old drivers? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Handyboard problems
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We've encountered a problem with our Handyboard that we hope the list may be able to help solve. It all started with the "Normal/Zap" switch on the charger board, which was somewhat loose. It wiggled whenever we changed the setting. After a couple (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | RE: Replacement for ZTX614 NPN Darlington Transistor
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I have looked in the Maplins Catalogue and they don't stock the 614, they stock others but not this particular one and I was wondering if anybody knew of a compatible version. Thanks for any help. John Hatton johnha@icsplc.co.uk (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | RE: IR Demodulator Range Finder Hack
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(...) Sure thing. The basic wiring for a 555 in astable mode is pretty straightforward; +5 volts |-----+ +-|-----|-+ +-Res.1-------| 8 4 | | | | |---...---| 7 3 |------> to Base of BJ Transistor Res. 2 | | | +----| 6 "555" | | | | | +--------+----| (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Sonar Adaption
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I am building a sonar ranging device and I want to add it to one of the digital inputs on the HandyBoard. How do you get the board to respond to the message given to it from the sonar? Adam Freedman adamfdp@aol.com (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 stuff
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Oh yeah, I meant to send an e-mail: "There are new drivers and a wiring diagram for using the Polaroid 6500 sonar ranging module with the Handy Board!! Just visit the HB home page: (URL) -Fred" That said, the answer to this question is simply, get (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Polaroid 6500 stuff
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We're planning to use the new Polaroid 6500 stuff on the Handyboard web page. We intend to use a six volt power source to drive our motors independently of the power source to the Handyboard itself (by cutting the appropriate trace on the board). (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | moving
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i know you've told us a thousand times who to send requests like this to, but i'm a looser who suffers from chronic "outlook is a piece of doggy doo" syndrome... i am moving from coreyfro@deepwell.com to coreyfro@cwws.net and would like to retain (...) (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator Range Finder Hack
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Try RADIO SHACK. They stock a pocket book range by Forest Mims. One of these is specifically on playing with the 555 timer IC Regards Terry Howsham (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | RE: IR Demodulator Range Finder Hack
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Thanks to David Kott for the addresses, the pdf file is a slightly updated version of the original so it will come in useful. He mentioned that he was using a circuit to modulate the IR transmission from the LEDs by using a NE555 to trigger a (...) (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | Replacement for ZTX614 NPN Darlington Transistor
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I am writing to see if anybody knows of a suitable replacement for the ZTX614 transistor driving the IR transmittion circuit. I can't find any easily available in the UK and was wondering if there are any other NPN Darlington transistors that can (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | UK SUPPLIERS OF PCBSDate: Sun, 23 Nov 1997 10:25:00 GMT
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Hi Bill, and once more many many apologies for taking so long to reply to your messages.. BB> Are the PCBs still available ? Sorry its been so long, I've been BB> running around like a mad thing the last couple of weeks ! Know the feeling! I'm (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | Steppers
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I am trying to use stepper motors in the handy board, but I can't find any directions on the web site. I thought I saw it somewhere once, but I can't remember where. Please direct me to the information, or if it doesn't exist on the page, HELP!!! (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | Re: External motor power
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(...) Yes, you have to cut the trace. See the FAQ for details: (URL) (27 years ago, 22-Nov-97, to lugnet.robotics.handyboard)
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| | External motor power
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I posted this question about a week ago but got no response. Since several other subscribers with the same question have asked me if I got an answer I figured I ought to post it again. I want to use an external battery for motor power. I see the (...) (27 years ago, 22-Nov-97, to lugnet.robotics.handyboard)
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| | How to know my position??
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Hello We are French Students and we are looking for a system to give the robot, which contains the Handy Board card, his position on a table (2*3m). Could you send us any information about this? Thank You... En français: Salut, Nous sommes des (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | Sorry.
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Whoops, I got so many auto-replies 'mail not delivered', I thought I mistyped the adress or something, so I decided to re-send it. After sending, I found out that it had come-through after all. Sorry, I'll pay better attention next time. (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | Re: OH YES It's Trigonometry
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I hereby send the formula for calculating the asin and acos. They're included a a GIF file, of which I'm sure you can view. I hope they'll be helpfull to you. Jeroen vd. Vegt PS I suppose you already know that 'asin x' does NOT equal '(sin x)^-1', (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | LOOKING FOR THE EXPANSION BOARD
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1. Does anyone know a source of supply for a fabricated & tested Expansion Board? If it is not in production, does anyone have the source code for the PIC 16C84 that is on the Expansion Board? Thank you. (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| |
| | Re: looking for bridge rectifier
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looks like they changed the part no. to 'DB101DI-ND'. Fred In your message you said: (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | looking for bridge rectifier
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HI, I'm looking for the bridge rectifier (D2) on the parts list. Digikey does not support the specified part number (DB101-ND). Can someone give me the voltage and current specs so I can find the correct part??? thanks in advance ron c (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | How to know my position??
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|
Hello We are French Students and we are looking for a system to give the robot, which contains the Handy Board card, his position on a table (2*3m). Could you send us any information about this? Thank You... En français: Salut, Nous sommes des (...) (27 years ago, 20-Nov-97, to lugnet.robotics.handyboard)
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| | How to know my position??
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|
Hello We are French Students and we are looking for a system to give the robot, which contains the Handy Board card, his position on a table (2*3m). Could you send us any information about this? Thank You... En français: Salut, Nous sommes des (...) (27 years ago, 20-Nov-97, to lugnet.robotics.handyboard)
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| | How To know my position??
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|
Hello We are French Students and we are looking for a system to give the robot, which contains the Handy Board card, his position on a table (2*3m). Could you send us any information about this? Thank You... En français: Salut, Nous sommes des (...) (27 years ago, 20-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Error in FAQ
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|
In your message you said: (...) whoops. it's fixed now. thanks. one thing: the range was correctly indicated in the FAQ as $6000-$6FFF. You've got it here as $6000-$6999. Fred (27 years ago, 20-Nov-97, to lugnet.robotics.handyboard)
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| | Error in FAQ
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|
While looking through the FAq I noticed what I think is a mistake - could you check ? In the memory map it says: Expansion I/O Bank 2 $6000-$6999 Reads Enable Y3; writes enable Y5 surely this should read : reads enable Y4, writes enable Y5. Can you (...) (27 years ago, 20-Nov-97, to lugnet.robotics.handyboard)
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| | unsubscribe
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unsubscribe microp@geocities.com (27 years ago, 19-Nov-97, to lugnet.robotics.handyboard)
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| | OOH YES! Its Trigonometry
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|
I've looked up the formula for calculating the asin and ocos. They're enlosed as .GIF attachment, because I can't type then in ASCII, but I'm sure you can view it. I hope they'll be usefull to you. Jeroen vd. Vegt. PS. I hope you already knew that (...) (27 years ago, 19-Nov-97, to lugnet.robotics.handyboard)
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| | Re: TOC4INT interrupt
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|
(...) Yes, 1 mSec. (...) Time slows down (the tick counter is no longer accurate), your motors get variations in their PWM signal, and you risk losing syncronization with any servos you have out holding position. (27 years ago, 19-Nov-97, to lugnet.robotics.handyboard)
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| | TOC4INT interrupt
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|
How do you know when you are "using too much resources" when installing programs into the system interrupt? Is there a limit to how long the system interrupt routine can last? What happens if all the instructions I place in there causes the whole (...) (27 years ago, 19-Nov-97, to lugnet.robotics.handyboard)
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| | sensor for distance
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|
(...) ***...*** * Frederic GIAMARCHI * * I.U.T. G.E.I.I. de NIMES * * 8, Rue Jules RAIMU * * 30907 NIMES CEDEX * * FRANCE * * Tel.: 04 66 62 85 22 * * Fax : 04 66 62 85 01 * * Email : giamarch@iutnimes.un...-montp2.fr * ***...*** (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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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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| | Unsubscribe
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Please unsubscribe me for the Handy Board user group. jacks234@pilot.msu.edu Thanks, Pete Jackson (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| |
| | OOH NO Its Trigonometry
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Hi All, Sorry, but I need to raise a question to anyone who paid attention in maths class at school. Although Interactive C provides tan, sin and cos functions is there anyway of performing the inverse of these - do these functions exist anywhere (...) (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| | unsubscribe
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subscribe microp@geocities.com (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| | Range Finder Hack
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|
I apologise to everybody for my last message, the ascii formatting went completely haywire. Hopefully this one will be correct as I has edited the text file again. To see the diagrams correctly in the majority of email packages that allow font (...) (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator Range Finder Hack
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|
(...) (2 URLs) the referring page. I have used this "hack", and found it to be quite extensible and flexible. We used "high output" IR LEDs, from Radio Shack (I don't have the part number, but, if you go in there, its the light light blue ones) that (...) (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Applications?
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|
(...) Yes. (...) Yes, if the motors draw less than 1Amp of current when stalled. (...) Yes. (...) You can drive bipolar stepper motors using the on board h-bridges. (...) Yes. The typical way to do this would be to attach your directional detector (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | hexapodial walkers & other stuff
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|
hi. I was looking thru the new Robot Store catalog (www.mondo.com) and saw that they were selling hexapod walkers. I was wondering has anyone here built a hexapod? Mondotronix had it so that there were 2 horizontal crossbars per 1 vertical leg. (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | subscribe
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subscribe shahian@csulb.edu (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| |
| | Applications?
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Hello to all Robo-maniacs!!! I was just wanted to make sure some thoughts about the Handyboard. 1 Can you connect it with a PC and after you make a programm in C, load it in the handyboard (and after disconnection can you apply the program on your (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | array variables
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Hello all, is it possible to create an array variable in the .icb file, if so how do you do it? -tanis (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| |
| | Re: 293s, Cable
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In your message you said: (...) this isn't the problem. (...) please do the following, and specify the point of failure. 1. Open a terminal emulator program on your CPU (e.g., ProComm for DOS, HyperTerminal for Windows 95, ZTerm for Mac). Select the (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator Range Finder Hack
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(...) I would be interested to hear about this too please. We are running a Group Design Exercise (our own version of a Lego robot competition). Designing the staff entry (to check the idea was feasible in the short time alloctated to the exercise) (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Platinen zu verkaufen
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Soory, this offer is valid for Germany only. So it's written in german. Hallo, ich hab hier noch eine Platine fuers Handy-Board uebrig. Eigentlich sinds 2. Also das eigentliche Board + Schnittstelle. Wer also noch Bedarf an so etwas hat, sollte sich (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | 293s, Cable
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We're trying to build a handyboard, and we attempted to dl the .s19, but it doesn't work. It gives the connecting at 1200 baud.... message but nothing happens after this. Two issues that I believe may be causing this are: 1) we don't have the 293 (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | IR Range finder
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I am posting this for in case any body is interested as I know that I will be trying to make use of it. I apologise in advance to anybody who already knows how to do this, or does not intend to use such a range finder, but I imagine there are a lot (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Ooops.
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It's unlikely you killed the MCU, there are 1k resistors in series with the RxD and TxD lines. Go to the assembly manual, and run through the series of tests that verify proper operation of the Interface/Charger Board. (URL) your message you said: (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | External motor power
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I want to use an external battery for motor power. I see the power expansion header apparantly for this purpose but it appears that I have to cut a trace to disconnect the HB battery from MOTORPWR. Is true? Is there anything else that I may have (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | IR Demodulator Range Finder Hack
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A few months ago I found information on how to modify the Sharp IR Demodulator to produce an analogue voltage relating to the strength of IR received. The problem is that I have lost the information and can't remember where I saw it. Has anybody (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Ooops.
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Help! I accidently plugged a network rj11 cable between my HB and the serial interface board. It seems that I released the smoke genie from R 11. I have replaced the resistor and the MAX 232 but I'm not getting the board to sync. Is there anything (...) (27 years ago, 16-Nov-97, to lugnet.robotics.handyboard)
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| | Shaft Encoders
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While looking through the code 'pcode.asm' I came accross reference to various encoder routines that enable Y0 and get RSE code from the data bus. How can I call these within a C Programme ? I've not seen this feature documented anywhere (or maybe (...) (27 years ago, 15-Nov-97, to lugnet.robotics.handyboard)
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| | Motorola Reference Guides
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I just got the set of Motorola HC11 guide books and reference manuals. I can highly recommend them - I am now able to understand the processor better, and how to take advantage of its many facilities. However when requesting them from the web site I (...) (27 years ago, 15-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR devices
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The IR led I assume would be the transparent one and the detector would be the black one? There are 2 leads on the transmitter and 3 on the detector, how and where should I connect it to the HB? Any diagrams available? If this works, I have about 10 (...) (27 years ago, 14-Nov-97, to lugnet.robotics.handyboard)
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| | AD: Wirz Electronics
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Hello Everyone, We have a number of new Microcontroller products that we think you may be interested in: ---...--- Microchip PIC Products: "Programming and Customizing the PIC Microcontroller" book by Myke Predko (URL) Up The Pace" book by David (...) (27 years ago, 14-Nov-97, to lugnet.robotics.handyboard)
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| | Re: bit_set and Poke
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bit_set in english is "for the byte at this adress, make these bits high". The first argument is the address (i.e. 0x0e). The second argument is the mask which indicates which bits to make high. bit_clear in english is "for the byte at this address, (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Microphone and Heat Sensors
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(...) Interesting sounding project Melissa. The trick is to distinguish the doorbell from other ambient sounds heard picked up by the microphone. One approach might be to use the LM567 PLL Frequency Detector. Its a relatively simple little 8 pin IC (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | microphones and heat sensors
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I am a highschool intern trying to build a lego robot which models a housepet using the handy board. My task involves the robot sensing a "doorbell" and moving towards the sound. I will need to use microphones to accomplish this and I am wondering (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | bit_set and Poke
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Could someone xplain the relationship that bit_set, bit_clear and poke / poke word have ? Specificallt in the bit_set code used for the motor control, 0x0e is placed before the bit values - why ? I geuess this is used to select the motor port, but (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | UK SUPPLIERS OF PCBSDate: Tue, 11 Nov 1997 21:40:00 GMT
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Hi John, JJ> I am just writing to see if you still have the PCBs available. If Yeah, I do - the guy I originally emailed hasn't got back to me yet. Neither has anyone else actually! I'm just in the process of enquiring about ordering a Fingerboard (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Chuck is correct. There are some other subtle differences between the D and E versions but the basic function and capability are the same. John Bachman (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | RE: Burning hot motor driver chips.
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(...) I wouldn't say it's partially correct, I would just say that the drive motors used in RC (radio controlled) cars are picked out to make the car go fast, and hence require a lot of current to produce this speed. They are readily available at (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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So I guess RC servos/motors are regular servo motors and DC motors that have been stripped from RC cars? Are they any diferent from regular servo/DC motors? If not, then why lable them as "RC"? Since the RF component isn't there anymore... :-/ (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) Well, that's partially correct. The RC cars usually have a speed control/ steering module that incorporates the RF receiver. This module supplies PWM signals to the drive motor and also controls a steering servomotor. Marco A.A. de Oliveira (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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So am I correct to assume that an RC motor had a built in RF reciever? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) I believe that's correct: Radio Controlled devices, RC devices. Marco A.A. de Oliveira assfalk@eece.unm.edu ---...--- Autonom. Robotics (SMART) Project UNM/NASA ACE Center ---...--- (URL) ---...--- (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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What does "RC" stand for anyway? I don't think it's Radio Control...is it? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Jonathan: I have _dozens_ of L293's as well as L298's with motor controller circuit boards i would be pleased to sell to you if you like. L293's for $5.00 canadian. If you would like to see the motor controller, check my website at (URL) under the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Hi, I got L293E (the 20 pin DIP package) from Mouser at $2.53 each. 800-346-6873. John Bachman (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Expansion Board
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It would be nice to see a set of raw, addressed digital OUTPUTS (as well as) analog OUTPUTS on the board. Maybe they are already on the handy board itself, however, they are not addressed on the data bus. The IC code libraries needed for this would (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | L239
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Does anyone know of a good source for the L293D or th TI SN754410? Future Electronics has them, but they want roughly $9.00 per chip. I am just looking for 4, but I don't want to be charged an arm and a leg to get them. Thanks ___...___ ___...___ (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Anthony, As you've no doubt heard, RC motors take much more current than the Handyboard can supply. To control RC motors your only choice is to create a separate H-bridge to drive the motors. You can do this fairly inexpensively with power (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR devices
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Hi Jeremy! I used the shaft encoder out of a track ball for my robotic project(same thing but a bit bigger). You do not need the IC out of the mouse just take the shaft encoder and use it with a IR led and detector pair. If you are going to use the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Hello, RC car motors pull a lot of current, from 2A to 8A. The L293D chip goes up to 1A peak (for some miliseconds) before it shuts down. I suggest bypassing the L293D chips and using something like the LMD18200. (URL) Good luck, Marco A.A. de (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Project Questions
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Three of us are undertaking a project using the Handyboard as the control system for a class at MIT. Our project, an autonomous blimp, has an unusual set of constraints, but we're hoping that your collective experience might be able to help us (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) sounds reasonable.. which "car" BTW? Some may be using that very same platform and may have some timely advice for you. (...) sounds like overload/overheating cutoff to me. (...) This is from the Handy Board FAQ : <---snip---> It is possible (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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