 | | Re: Polaroid Sonar
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I was getting the exact same result when I ran motors with the HB while using my sonar. The problem was that there was alot of noise caused by my motors...apparently electrical and EMI. Do you have alot of components that may be causing some noise (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Collision Advoidance Emitter Circuit
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Hi Gordon, When you mentioned about "doesn't have a ground in it", are you refering to the part the drives the LEDs, right ? If so, the explaination of the circuit is that when the output of the inverter that connected to a 100 ohm register goes low (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Collision Advoidance Emitter Circuit
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(...) Yes, i have. (...) And: "Yep, it works" (little noisy though) Something particular you want to know? Hans (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | parts???
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I wonder where o where i can get the 32K ram chip and CPU for my handy board. I have e-mailed Gleason Research and Digital Micro Systems, and they do not respond to me! Anyone have any other ideas, i would appreciate them :-) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Polaroid Sonar
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Help! I've purchased the Polaroid Sonar OEM kit, plugged them in in accordance to Kent's instructions and using his software, but if I plug in BINH through a 360 Ohm resistor or with no resisitor, all I get is 1 - 2". If I unplug it, I get (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Collision Advoidance Emitter Circuit
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Hi All, Had anyone actually built the Infared LED emitter circuit that is on the Rug Warrior? (i.e. pg 108 of Chapter 5 of the book "Mobile Robots" by Jones and Flynn). I've looked at it and I can't for the life of me figure out how it works. Before (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Good books about electronics
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(...) Mike, I would also recommend the book: "Electronics (A Self-teaching guide)" by Harry Kybett (1986 by John Willey & Sons) ISBN 0-471-00916-4. It is a very excellent beginning text. It teaches concepts and then you self test yourself every 2-3 (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re: GPS
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(...) Yep. Me! There weren't any major headaches involved in doing it. Feel free to ask me questions. I may have to get my source from home in order to answer them though. Curt Mills, WE7U Senior Methods Engineer/System Administrator (...) (27 years ago, 21-Apr-97, to lugnet.robotics.handyboard)
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| | Re[2]: motors
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Thanks. I tries that. I even tried to use four of them in parralel. OK, here's what I've discovered...just to let you all in on it and maybe it'll help someone in the future. I pulled the leads from the motor header and powered the motors directly (...) (27 years ago, 21-Apr-97, to lugnet.robotics.handyboard)
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| | Handyboard to Vector 2X compass
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I'm planning to hook a Vector 2X digital compass to my HandBoard. I'm looking for any code for such and interface. It should be simple SPI stuff but I've never messed with the SPI before and would rather not re-invent the wheel. I've checked the web (...) (27 years ago, 21-Apr-97, to lugnet.robotics.handyboard)
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| | Re: motors
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Mar, You might want to try attaching a small (0.1uF) capacitor to the motor leads as close as possible to the motor. Use a ceramic or monolithic ceramic capacitor. That might reduce the motor noise your sonar board sees. Also remember that even (...) (27 years ago, 21-Apr-97, to lugnet.robotics.handyboard)
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| | GPS
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Hi, I want to connect a gps-receiver which provides NMEA-0183 data to the HB. Did anyone connect a gps to the HB before? Carsten (27 years ago, 21-Apr-97, to lugnet.robotics.handyboard)
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| | Using Step-Motors
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A couple people have expressed interest in how to use step-motors with their handyboards. I have used step-motors with my miniboard, and since both the handyboard and the miniboard use two L293D chips to run the motors, I am fairly confident that (...) (27 years ago, 20-Apr-97, to lugnet.robotics.handyboard)
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| | Re: motors
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I haven't had the same poblems, but I have a theory as to your problem. There are two probabilities: 1) The motor is causing too much noise and is interfering with the sonar, or 2)The motor is giving off electrical noise (i.e. electromagnetic waves) (...) (27 years ago, 19-Apr-97, to lugnet.robotics.handyboard)
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| | motors
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Hi, I have some motor trouble. I have two motors. I have a polaroid sonar. When I run one of the motors, the sonar works. When I run the other motor, the sonar's detected distance jumps arround randomly. The randomness seems to be more at higher (...) (27 years ago, 19-Apr-97, to lugnet.robotics.handyboard)
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| | hbsonar
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I am trying to run 4 sonar sensors from the HB, and I'm not sure how to go about doing this. I have a copy of the code from the ftp://cherupakha.med...ntrib/kent directory, but I'm pretty bad with assemby language and I'm not sure what I would need (...) (27 years ago, 19-Apr-97, to lugnet.robotics.handyboard)
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| | Stepper motors driver circuit and .s19 compiler...
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Hi, I heard from fred that there is someone out there who had used stepper motors with the handyboard, I am doing something which need to use stepper motors. Therefore I need your help in this area, please email me how should I go about design the (...) (27 years ago, 19-Apr-97, to lugnet.robotics.handyboard)
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| | Stepper motors driver circuit and .s19 compiler...
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Hi, I heard from fred that there is someone out there who had used stepper motors with the handyboard, I am doing something which need to use stepper motors. Therefore I need your help in this area, please email me how should I go about design the (...) (27 years ago, 19-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Stepper motors driver circuit and .s19 compiler...
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Good Day All, I also would like more info on this. If not too much trouble, could it be posted to the whole board as well? Take care... (27 years ago, 18-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Good books about electronics
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The ISBN is: 0-521-37095-7 I took the class at harvard that the book was written for. It was a good class. I learned a lot. I'm not so good with the analog stuff though... There is a student manual which is pretty helpful too. It's by Hayes and (...) (27 years ago, 18-Apr-97, to lugnet.robotics.handyboard)
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