 | | Re: Sonar question
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(...) The battery for the handy board is a 9.6V cell (8 * 1.2V cells in series.) A normal 1n400X diode will drop 0.7V each. (6 * 0.7 = 4.2) 9.6 - 4.2 = 5.4V (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Sonar question
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I'don't even bother using diodes at all I just use a 7805 voltage regulator that is well heat sinked and never had a problem with it -----Original Message----- From: ruizvic@mx1.ibm.com <ruizvic@mx1.ibm.com> To: handyboard@media.mit.edu (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | Re: 2sonar
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(...) I haven't used the transducer multiplexor myself; I decided to just hook up a second sonar module to the HB in the same manner as the first is hooked up. It looks like using the multiplexor ought to be fairly simple, though. First off, in the (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | Sonar question
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Hi to all, I would like to know what difference there are if I connect the 6 diodes between the Handy Board & the Polaroid Sonar Card. Can I connect the cards without diodes? I tested the voltage at the Catode at the end of the 6th diode and my (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | Assembler math/PID
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Hello, I am writing PID code that runs on the system interrupt. I am finding that I have to rewrite alot of the great math functionality available through IC. Does anyone know of a way to use an IC function on a regular system interrupt schedule? (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | motor code questions
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Hi, I got my Handyboard up and going and was trying the following code for driving my motors. (Figure I would try known code before forking out on my own). The code I got from the 'Inspiration to implemntation' book. Anyways it does not seem to (...) (26 years ago, 2-Dec-98, to lugnet.robotics.handyboard)
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| | sonar
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what program to control about 2sonar.jpg? how i adjust program (sonar.c) for 2 sonar in picture 2sonar.c? (26 years ago, 2-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Hacking Servos
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Thank you all very much for your help :) Best, Andre. (...) ===...=== Andre Philippi - Applications Developer | Phone: 626-296-5016 philippi@corp.earthlink.net | Fax: 626-296-5113 Earthlink Network, Inc. | 3100 New York Drive (URL) | Pasadena, CA (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | RE: Hacking Servos
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Yeah, I remember seeing that one; I may actaully have the info at home... Anyway, an R/C servo has a hard stop to limit travel because the electronics use a simple potentiometer on the output shaft for position feedback. These pots typically have (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Hacking Servos
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(...) I put together a page with detailed instructions that has been used by a number of high school students without any problems. The robot is based on a Basic Stamp but the servo modifications are easy and work with any controller. (URL) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Hacking Servos
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Howdy Folks :) I remember reading a web doc a while ago on how to convert servos so their shafts can rotate more than 180 degrees... It was a nice doc, with pics, schematics, and everthing... but I lost the URL... :( Does any one know what doc am I (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HandyBoard and iMac?
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It doesn't bother me that much: I haven't used a floppy in two or three years. I have ISDN at home: it's way faster than a floppy ;^). -- Eric (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | 2sonar
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i use circuit on 2sonar.jpg . if i use sonar.c program, how i adjust this program for 2 sonar trasducers. ?(a picture on 2sonar.jpg) i want to 1 sonar working single , don't together.or to alternate. Sonar number 1(#1)is working until check (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | 2sonar
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i use circuit on 2sonar.jpg . if i use sonar.c program, how i adjust this program for 2 sonar trasducers. ?(a picture on 2sonar.jpg) i want to 1 sonar working single , don't together.or to alternate. Sonar number 1(#1)is working until check (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | 2sonar
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i use circuit on 2sonar.jpg . if i use sonar.c program, how i adjust this program for 2 sonar trasducers. ?(a picture on 2sonar.jpg) i want to 1 sonar working single , don't together.or to alternate. Sonar number 1(#1)is working until check (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HandyBoard and iMac?
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hi eric, i haven't tried any of these products, but they *should* work. the mac hb software uses low level driver calls, so if that stuff is patched and translated to usb, it would work. but if i were you i'd get one and try it on an existing (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | micro-mouse
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Hi, can anyone tell me what should I initialise before I start writting all my program for my robot in a microcontroller. Thank you Chin (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Re: What needs to be done to get both the Floating point fix & the Smooth PWM?
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Hi I did the port of the smoothpwm stuff into the IC 3.x source code. The Newton Labs ftp site has the smoothpwm files available from: ftp://newtonlabs.com...mooth-pwm/ If someone can get me the code for the FP fix, I'll see if I can get a new pcode (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HandyBoard and iMac?
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It doesn't even have a floppy drive! -----Original Message----- From: Eric Noyau <noyau@apple.com> To: handyboard@media.mit.edu <handyboard@media.mit.edu> Date: Monday, November 30, 1998 8:39 PM Subject: HandyBoard and iMac? (...) can get one dirt (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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| | HandyBoard and iMac?
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I'm replacing my aging home PC with an iMac (look at my email address: I can get one dirt cheap!) and I'm wondering if I can use it to pilot my trusty HandyBoard. Anybody have any experience in this area? I'd like to throw away the PC... The iMac (...) (26 years ago, 1-Dec-98, to lugnet.robotics.handyboard)
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