 | | Re: Two way audio -Reply
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Yes, we have not only considered that idea, we have acted upon it. I guess the more operative question would have been: Is there a more efficient method of communication other than the wakie talkies? (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Two way audio -Reply
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That's a hard one because you have to have sufficient gain from the robot microphone to hear someone 2 to 8 foot from the microphone. Usually communication equipment limits their microphone gain on purpose to exclude background noise. You have to (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Two way audio -Reply
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(...) How about those teenie weenie FM radio microphones that they advertise "you can hear a wisper from 14feet away". Usually in "Electronics Now" and other magazines. (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Two way audio -Reply
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How 'bout a cheap pair of voice activated walkie talkies?? (...) Hi, We are trying to transmit our voices to our remote robot to create the impression that the robot is talking. In addition, we want to be able to hear what the robot hears. Does (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Two way audio -Reply
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A couple of years ago I built a small FM transmitter that had a small microphone on it. I could hear whispers in the room next door when I turned it on and tuned in a small transister radio to its frequency. This may be an option. Mike (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Assembler math/PID
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Justin, Thanks for your reply. I assume you had one process doing the PID in a tight loop, and then had other concurrent processes doing other tasks. Was there ever a problem with the PID process not getting scheduled within the 1Khz system (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Two way audio
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Hi, We are trying to transmit our voices to our remote robot to create the impression that the robot is talking. In addition, we want to be able to hear what the robot hears. Does anyone know any products that we can attach to our robot that will (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Extra output for clocking
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Thanks for the advice on the ouput compare and portA. What I realized was the CPU time is being shared by some many functions, like the LCD printing, IR, PWM, that I'm not getting a fast enough pulse from the motor ports. I disabled a lot of these (...) (26 years ago, 4-Dec-98, to lugnet.robotics.handyboard)
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| | motor questions using motor(x,y)
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Hi all, The motor(x,y) function in the lib_hb.c file works as expected (the motor speed does vary depending on value given and the correct motor goes on), but when I actually have a motor in the header both LEDs go on! (and I get corresponding (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Sonar question
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The Polaroid Sonar board requires a supply voltage less than 7 volts. The battery of the handy board is around 12, so you'll probably shorten the life of your sonar board considerably if you connect it straight in (i.e. burn it up :.)). The diodes (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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| | 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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