 | | Good 9V motor source
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Hi all....I'm looking for a good source of 9V gear motors that i could use with the handyboard for a mobile robot. Currently, i am just using the little 9v motors that came with the board, which i have plugged into the cheap gearbox from a toy tank, (...) (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | Re: -1 with sonar routines?
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(...) The elapsed time calculation can result in negative numbers since the system clock wraps back to zero when it's maxed out. If the elapsed time comes up negative, then the sonar_sample() and sonar_closeup() functions return -1. This could be (...) (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | -1 with sonar routines?
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What causes a -1 with the sonar routines. I checked about all the connections that I could think of. Any help would be appreciated Thank you, -Peter ---...--- Peter Eacmen Boston Latin School babylongod@usa.net Knowledge is power, power is money, (...) (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | stepper motor standard libary
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hi, i need to know that is there any standard libary files in the Interactive C software required if i want to use a stepper motor ? If Yes, how should I porceed it ? rgds, phillip (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Has anyone been experimenting with mapping algorithms?
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For a class project, I found a few alternatives for obstacle avoidance with known areas using evolvable code. You could call it mapping, I suppose, though it maps for a specific type of problems - those that have a "goal" of some sort (I used a (...) (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Has anyone been experimenting with mapping algorithms?
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(...) The two basic approaches are (1) a bitmap, and (2) a list of obstacle coordinates. A bitmap is just a grid of 1's and 0's indicating the presence of an obstacle at each grid point. It can be implemented as a 1-D integer array with a simple (...) (26 years ago, 29-Nov-98, to lugnet.robotics.handyboard)
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| | Has anyone been experimenting with mapping algorithms?
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Hi everyone, We've been reading up on the many different algorithms for mapping an environment using autonomous robots. Has anyone else been trying to figure out the best approach to map an area and it's obstacles using less than 32k of memory? (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Choosing a shaft encoder?
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We're using a track drive system and we're going to be using L.E.D. proximity sensors off of the teeth of the track gears. The tank tracks appear to be very stable but it's still too early in the development to know how repeatable the robot (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Optrex lcd displays
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I must apologize for my last request, upon further investigation I found an excellent resource that answers the questions i posed earlier. For anyone who might be interested, the source can be found at : LCD MODULE TECHNICAL REFERENCE (FAQ) Version (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Choosing a shaft encoder?
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i use US Digital encoders, www.usdigital.com. they are a bit costly, but very accurate, and have quite a few numbers of resolutions. good luck justin (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Optrex lcd displays
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I am trying to interface an Optrex DMC display to a miniboard. What pins besides the data lines need to be connected and to what? Anyone used these displays yet, I have two a one line x 16 characters and a two line x 16 characters. The pin out (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Choosing a shaft encoder?
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(...) hy, I used HewlettPackard shaft encoders HEDL5540 (500 steps per revoltion) with HCTL2020 quadrature shaft counters/decoders. With them you get 500*4=2000 steps per revolution, which is quite a lot. For me They seem to be a good (but not (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Choosing a shaft encoder?
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(...) I've had good results using the Hall-effect magnetic sensors that Patrick Hui sent with my HandyBoard. I glued magnets into three of the six holes in a Lego pulley wheel and glued the sensor into a small Lego brick. I don't know the part (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: How to use the addition analog port ?
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You can time share both your digital and your analog so long as your signal update speeds are not critical. Use a 4 to 8 demultiplexing chip for 4 of your digital I/O and an 8 to 4 multiplexer for the other 4. This effectively provides 8 digital (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | When people answer a question, I would like to broaden my knowledge as well.
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Please either carbon copy your solutions to me, or the HB mailing list. I see a lot of good questions, but only a very few peoples responses. Thank you, (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Choosing a shaft encoder?
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As a neophyte robot builder and HandBoard user, may I ask for help in choosing the best shaft encoder? What vendor/supplier should I use? The current project is a very simple robot with a goal of accurate navigation. Thanks! (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Re: How to use the addition analog port ?
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these aren't actually additional ports. if you look at the PCB wiring you'll see that they're just connected to regular inputs 0-3. these extra connectors will be used by the expansion board. please look for an official notice regarding the exp (...) (26 years ago, 28-Nov-98, to lugnet.robotics.handyboard)
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| | Print to host computer
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Hi, Does anyone know how to print messages to the host computer while running IC.exe using "printf" statement. Currently, when printf is executed, it print to the LCD. Is it true that the handy board can only work when the LCD is plugged onto the (...) (26 years ago, 27-Nov-98, to lugnet.robotics.handyboard)
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| | How to use the addition analog port ?
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Hi, I need additional port for the analog input. I have used up 7 analog ports and 9 digital ports. Hence, I need additional port from the HD. I came to know that there are 4 extra analog port on the HD just above the analog port 0 to 3. These (...) (26 years ago, 27-Nov-98, to lugnet.robotics.handyboard)
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| | IC source compilation under DOS
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Hi ALL Here is a Good News. I used Visual c++ successfully to compile IC Source code. I am testing it now. Once it is done I will release the project files/modified files to all. Prasad (26 years ago, 27-Nov-98, to lugnet.robotics.handyboard)
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| | IC Source compiling under MSDOS
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Hi Anybody has a idea how to compile ic source under DOS.( i.e Which compiler to use etc.) Thanks Prasad (26 years ago, 26-Nov-98, to lugnet.robotics.handyboard)
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| | Re: source for pcode FP divide fix?
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Here's the HB 2.81 pcode with floating point divide fix. This new FLTDIV routine was giving to me by Jon Howell. I just patched the original math library with it and recompiled the pcode. I'm pretty sure this is the same fix that Newton Labs is (...) (26 years ago, 26-Nov-98, to lugnet.robotics.handyboard)
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| | source for pcode FP divide fix?
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Any chance that the source for the recent pcode FP divide bugfix can be released so that it could be retrofitted to the 2.81 freeware source? I'm not suggesting that Newton Labs actually do the retrofit, just that the source for the patch be (...) (26 years ago, 26-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Controlling Parallel Port Pins
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Check out Jan Axelson's Lakeview Research. You won't be disappointed and you won't know where to start. :-) (URL)This is kinda off the HB topic, sorry. (...) output (...) (26 years ago, 26-Nov-98, to lugnet.robotics.handyboard)
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| | RE: pcode 3.2 beta with FP divide fix
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Hi Sargent, I have successfully downloaded the new version of pcode. I received the bootstrap message "IC v3.2 beta 1". I have done the arithmatic operations and got accurate answers. I would like to thank all those you helped me in solving this (...) (26 years ago, 26-Nov-98, to lugnet.robotics.handyboard)
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| | Controlling Parallel Port Pins
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This is kinda off the HB topic, sorry. How do you control the individual output states of the parallel port pins? I'm working with some students where they must use a parallel port to control the states transistors and chips that ultimately control (...) (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Help
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Hi John, It depends on what kind of circuit your infrared sensors are in. An infrared diode or transistor can not be hooked directly into the HB. They have to be biased properly and the signal amplified to be compatible with either the digital or (...) (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | German Robotic User
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Hi all, i want to establish a German-Robotic-Group. Are there any german robotic users are interesting in this? I´m building sumo-roboters. You need more informations? Please mail bye bernd klein P.S. It is possible i will not answer during the next (...) (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | micro-mouse
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Hi! Can anyone tell me what are the registers that I have to initialise for a microcontroller before I start to write a program? Thank you. Chin (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Sharp IR-Distance Sensor GP2D02
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Hi Rajbala, in germany i can get this sensor from "Conrad Electronic". The Sensor is produced from Sharp. It is a very interesting sensor, because it is cheap (ca. 16,00$) It is possible to measure distances between 8-80cm, with a accuracy from (...) (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | pcode 3.2 beta 1 with FP divide fix
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Hi all, With Jon Howell's help, we now have available a new version of IC pcode which fixes the intermittent floating point divide problem. The divide problem was caused by a bug in the floating point library used by the pcode. The pcode works for (...) (26 years ago, 25-Nov-98, to lugnet.robotics.handyboard)
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| | Unsubscribe
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Please Can You Unsubscribe Me From The Handy Board Mailing List (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | Modification of Handy board
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Hi Everyone, I am in urgent need to learn how to modify the Handy Board to support 3 stepper motors (without the Expansion Board). I have absolutely no clues as to how this can be done so I would appreciate assistance from anyone who has tried this (...) (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | help
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Could someone tell me how the "IR_signal" function work, please?? John -- John A. Atkinson-Abutridy EMAIL: atkinson@inf.udec.cl Profesor Asistente Dept. de Ingenieria Informatica URL: (URL) de Concepcion Concepcion, CHILE Phone: (56) (41) 204305 Fax (...) (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | Help
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Hi, I need to send and receive IR signal (not from remote controller) in the Handyboard 1.- Could someone tell me what kind of routines I must use??? NOTE: I am not interested in getting codes from a RC, but also signal to proccess differents (...) (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Source Code For IC
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try (URL) Hi (...) (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | Source Code For IC
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Hi Iam looking for IC source code for DOS/Windows. Has anyone got information Thanks for Help Bye Prasad (26 years ago, 24-Nov-98, to lugnet.robotics.handyboard)
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| | HOW TO UNSUBSCRIBE
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please *don't* send unsubscribe requests to the whole list. Fred Martin is the only person who can unsubscribe you. Send him email at fredm@media.mit.edu. Fred In your message you said: (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Source code for IC
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Hi Iam looking for IC source code for DOS/Windows. Has anyone got information Thanks for Help Bye Prasad (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Intermittend IC floating point divide problem
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Somebody already did part of the job. If you go to (URL) you can download a pcode source for a road warrior kind of robot with some "corrections to the floating point math library to produce correct results for several previously buggy operations". (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Unsubscribe
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Please unsubscribe me from your handyboard list. Thank you. John Rutledge (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Unsubscribe
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Unsubscribe me from the handy board mailing list please (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Intermittend IC floating point divide problem
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Dear Richard and Javaid, I have assigned a programmer to track down the floating point divide problem, and will keep you posted on its resolution. We believe it is a problem with the floating point library that is assembled into the pcode, so it is (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Incorrect number for Pitsco Dacta
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Oops. I gave out the fax number instead of the voice number. The correct telephone number for Pitsco Dacta is 1-800-362-4308. Sorry about that. --Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Sharp IR-Distance Sensor GP2D02
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Hi all, have somebody experience with the Sharp GP2D02 IR-Distance Sensor. It´s a nice and cheap Sensor. I plan it to connect via the SPI connector on the handyboard, but today i have problems with the timing. Greetings Bernd Klein (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | freeware problem
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hello, i downloaded the freeware version of IC for DOS, and i believe it to have a few problems. these problems were not in another version that i had on disk. the problems are: there are no stop_button(), start_button() functions, only (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Building an IR/ultrasound co-processor... (LONG)
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Hi, I'm in the process of building a combination IR and ultrasound co-processor for my HandyBoard based robot. It's based on what Chuck McManis did for his Cougar bot. My version will have forward and backward looking IR and include the sampling and (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | IC errors in arithmetic operation
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Thankyou for your kind response to my student Javaid Iqbal on errors in using floating point divide within IC software. The errors have effectively brought our use to a full stop at present because we cannot rely on results nor bypass what has (...) (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Arithmatic operation
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(...) Yes, you are right. But I think this should be address by the software programmer. joema (26 years ago, 23-Nov-98, to lugnet.robotics.handyboard)
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| | PID Code
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Hi all! I am using the handyboard as a PID controller. I wrote my own program it didn't perform really well. Is there any resource about PID using HB so I can furnish my program? Thanks a lot!! Keith (26 years ago, 22-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Arithmatic operation
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if you are not trying to divide numbers of great precision(many significant figures), then you can try multiplying by some order of 10, performing your division, then dividing by that same order of 10. i have used this before, but not for the same (...) (26 years ago, 22-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Arithmatic operation
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(...) I've asked for help with the floating point bugs in IC before, and nobody seems to care. Unfortunately, I've come to not use IC floating point variables at all, since I can't trust them. It's all very frustrating since none of the IC versions (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Using 30VDC to drive motors
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Dave As far as connecting the grounds, that just means that the HB and the motors must share a common ground. The H-bridges need to reference the direction and PWM signal to ground and if that ground reference is not the same as the HB's the motors (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | RE: New user - printf question/problem
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I'm still not sure what caused the problem, but a new bootstrap/reinstall of the pcode seems to have fixed the problem. I can now successfully use the printf function. Odd though, that that was the only command that wasn't working correctly. Todd (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | unsubscribe
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(26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | New user - printf question/problem
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Okay, this may seem silly, but I've got a very basic question. Just received a new handyboard (assembled, ready to go from Gleason). After charging it up, installing the pcode and booting all works fine. The 'Interactive C' text shows on the screen. (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | Using 30VDC to drive motors
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Hello, I have finished building Matt Harlan's H-Bridge circuit (from the Handyboard FAQ) and I have come across the following instructions: "Make sure the supply ground for the 18200's is connected to the HB ground. You'll get some very strange (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem
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(...) to make the connector more physically and electrically stable. (...) of course, only 2 connections are needed to make a ckt. (...) you should figure up to several amps of current flow. (...) it should work fine. good luck. fred (...) (26 years ago, 21-Nov-98, to lugnet.robotics.handyboard)
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| | Re: LEGO: looking for gears
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(...) Call 1-800-453-4652 for a Lego Shop-At-Home catalog. They have an assortment called #5229 Gears & Differentials for $4.50, that has all but the huge 40-tooth gears. Shipping is free. If you need the 40-tooth gears, you can get four of them (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem .
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Philip In a message dated 98-11-19 21:05:04 EST, you write: << hi, I have a big problem. I followed the method of yours that just lift up pin 8 of one L293 and wirewrapped it. The positive supply is wirewrapped to pin 8 . How about the negative (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Sharp IS1U60 availablity
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Check B. G. Micro 800-276-2206 www.bgmicro.com I would not be too concerned with the actual part number, just look for an Infared sensor or remote control sensor. Also get the pin outs as these may be different. Also have you considered using fewer (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | serial communication
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Hi, Does anyone know the what is the most suitable port settings to use ? The Bits per second, number of data bits and stop bits, parity bit and the flow control type. Thanks for helping... (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Compling *.ICB files
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Hello, Does anyone have any tips on compling *.ICB files on Windows NT? I have IC 3.2. Using the as11_ic.bat file works with much modifications to the the *.asm files. The web based complier at Newton Labs compiles the code, but loading the ICB file (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | arithmatic operation(more)
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Hi all; I have also reckon that following numbers are also giving 2 in answer if divided by same numbers. 5.1,6.1,7.1,4.6,5.6,....4,1.92.3, 2.8,3.3,3.8,8.2,8.7,...10.2,10.7, thanks javaid iqbal (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Arithmatic operation
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Hi all, I am dividing 4.1 by 4.1 in following manner and getting answer 2. instead of 1. Dividing 4.2 by 4.2 give 1 result, dividing 4.6 by 4.6 again give 2. Except 4.1 and 4.6 rest all numbers give 1 result. I am using IC 3.2. Any help in this (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem
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hi Fred, Why there is 2 holes each for the positive and negative supply on the pin jack (J13)? I thought that just insert one hole each for the positive and negative supply only. I need to know why the J13 is designed for 1x4 holes before i decide (...) (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | robots
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I WANT TO BE ON THE LIST. (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Sharp IS1U60 availablity
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(...) How about a replacement of the IS1U60, which you can find in JAMECO Part No. 106382 or Part No. 131908 Though a little bit expensive. joema (26 years ago, 20-Nov-98, to lugnet.robotics.handyboard)
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| | Sharp IS1U60 availablity
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I'm looking to purchase about 12-15 IS1U60s to use as optical bump sensors and I'm having trouble finding someone that has them in stock and doesn't want $5.50 for them. Sterling Electronics, 781-938-6200, sells the part for around $1.75, with a $25 (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Analog Expansion Header On Handy
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Hi, I knew that the analog expansion header in connected to the PE0 to PE3. How should I call the analog command ? For example, if ( digital (11) ==1 ) ......... or if (analog (3) ==1 ) ......... Hence, how should I use to apply into writing a (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Power Expansion Header On Handy
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hi, I came to know that the power expansion can be used on J13 ( 1x4 pin jack). However, why there is a 2 positive holes and 2 negatives on this header? If i'm using a pair of DC motor 12V each, and i supply a 12v alkaline or NIMH rechargable (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Other batteries... -Reply
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I guess what I'm wondering if the recharge circuit on the Handyboard Serial/charger board will work well with a sealed lead-acid/gel-cell. r than the pleasure of smelling boiling H2SO4 what could happen?? ould be convienent to just use the HB (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Other batteries...
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Just a quick anecdote about Gel-Cells. I have a small and useless robot that simply rolls around on the floor and bumps off things. The motors are powered by a small Gel-Cell. I had run it that day and run the motor batteries flat, so I rigged a (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | RE: PE4
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Rajbala, PE4 is the 3rd pin on the 68HC11. Just by looking at the schematics in the HB manual I would think that it probably does connect to analog input 4. Joe Martin (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Help Y0-Y5
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Sorry for my bad english ! i want to write - i have a big problem, i want to use the ports Y0-Y5 but i don´t know how i use them. Bernd Klein (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Help
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Hallo All , i have a big problem, i want to use the ports Y0-Y5 but i don´t know why. I need a ports for write and read. On Saturday i have my first sumo-robot contest and i need this ports !!!! I´m want to use a Sharp GP2D02 Distance Sensor, for (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Other batteries...
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A gell cell battery is charged via a maximum allowed charging voltage. If the charger doesn't limit the charging voltage to less than 14 volts it will shorten the life of a 12v gell cell considerably. A Ni-Cad uses a constant charging current, but (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem .
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hi , Attached from the previous mail, I have already solved the problem listed below. It is the 7404 is damaged .What causes it? Any ideas? RIght now this problem that melted my socket on the L293, the supply I used is 12V supply to my 2 DC motors. (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem .
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hi, I have a big problem. I followed the method of yours that just lift up pin 8 of one L293 and wirewrapped it. The positive supply is wirewrapped to pin 8 . How about the negative supply of the batteries should insert or wirewrapped? I inserted (...) (26 years ago, 19-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Miniboard/download mode
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(...) Check the voltage at the MOBD pin on the chip (not the socket, not the bottom of the board). If it is 5V with the switch in the one position, and ground (0V) in the other position, you may have a defective chip. Otherwise I'd guess open (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Miniboard/download mode
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Hi all, I have a miniboard I built recently that won't go into download mode. In the note called "mb-debug.txt" on ftp://Cherupakha.media.mit from Chuck McManis he describes the exact problem I have. "If the RED LED light ups, or the motor LEDS (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Other batteries...
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Is it ok to use batteries of the sealed lead-acid type (from a UPS). I have V 7.5 Ah and I was wondering if the battery charge circuts would work correctly if I simply replaced the NiCd pack with the lead-acid battery. Are there any considerations (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Re: I overcharged my handyboard.
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(...) What is the battery voltage? Does it work with a different battery or DC adapter? --Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, Virtue is insufficient temptation. Will Bain, & Tatoosh (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Watchdog and Handyborad.
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Anyone konw if is possible to implement a watchdog in the Handyboard? I try but the program hangs when i try to display something in the LCD. Thanks in advance. Germán Gentile (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | RE: low-cost robot platform
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The platform in question was based on the 'Hercules' r/c car that is available at some of the FAO Schwarz stores. This platform appears to be identical to what was used by the USC entry in the 1997 Robo Cup competition. Clem (ctaylor@SRTC.COM) has (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | low-cost robot platform
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A couple of weeks ago, someone wrote and said that Todd Graham had told them where to get a "cool, low cost" robot platform. I was wondering what, where, and how much was that platform? Information would be appreciated. thanks james jones James C. (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Serial Communication %!*#!!--Please Help
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Hi Peter, There was recently a discussion on the list where it was revealed that the network style cable does NOT work to connect to HB's together. If you go back to the FAQ there will now be correct instructions for making a cable to link two HBs. (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | finding handyboard parts
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Hi all This is a list i compiled when building my handyboard. I found some parts Quite hard to find and spent a lot of time reading through catalogs etc. So i thought it might save someone a lot of time. The list is pretty much complete and i now (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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While on the subject of motors and H-bridges. I recently ordered a L298 based motor controller kit from JCM Electronics. Unlike the L293, the L298 supports breaking and has two bits for direction and one enable bit. It would be easy to add use an (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | 32V DC Motor
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hi i'm trying to use the handy-board to drive a 32V DC motor. a webpage at the handyboard website showed that this can be done by cutting the original power trace and simply plugging in a new external power source(a 36V battery pack?). what i would (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Serial Communication %!*#!!--Please Help
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I need for two HBs to communicate via the serial port. I'm using the "network" style cable. With Randy Seargent's serialio routines and the code that is in the HB FAQ. Please Help my project is due the Monday after Thanksgiving. Any input would be (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | HB not responding
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Hi, I have successfully downloaded the pcode_hb.s19, but my computer can't synchronized with my Handy board. It always return the message "Handy board not responding". What should i do now ??? I'm using Windows 95 on a 233Mhz machine, and i have try (...) (26 years ago, 18-Nov-98, to lugnet.robotics.handyboard)
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| | Availability of Expansion board?
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What is the status of the Handyboard expansion board? The latest page update from Fred appears to be Jul 20th, and indicated that the board might be available at the end of the summer. Todd (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | PE4
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Hi : It is given in the standard ir_detect() routine that the detector should be connected to PE4? Can anyone tell me what is PE4 ? Is it the same as analog input 4 ? Thanks . Rajbala (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | RE: 32V DC Motor
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Greetings, We are using a LMD18200-based H-bridge circuit from Wirz Electronics to drive our motors. We simply removed a L293 chip from its socket and ran the signals (a short distance) to the LMD18200 circuit. Marco A. A. de Oliveira (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | RE: 32V DC Motor
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Just a quick note.. As i remember if you stack the SN??? chips to get the current rating you also have to piggyback a L293D as these incorporate the anti-spike protection diodes as the others don't Russ..... -----Original Message----- From: MAR (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | LEGO: looking for gears
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Is there an inexpensive way to get a large assortment of many LEGO gears? Third parties? -Doug Blank (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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There's an alternative to th4e L293D chip that fits the Handy Board. This chip can supply 1A. I know you need 2+ Amps but a common method adopted by some people is piggybacking two or more chips. (You put one on top of another to allow the curent to (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Please use subject headers on all mail
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(...) Thanks Liddy PLEASE !!! Use subject headers on your e-mail. Beam; Handyboard; PIC; MICROE; MicroMouse; Motors; LEGO; and etc. Any letter case is better than no classification of the subject. Thanks Ed Spike 73,33 -- (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: 32V DC Motor
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Edmund, I recently received 2 LMD18200 chips from National Semiconductor through their free samples order (limit 2/day, 5/week). These chips deliver up to 3A continous output, and up to 6A peak. They are ideal for driving DC/ Stepper motors. All the (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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