 | | 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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