 | | Re: serial connection
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(...) Your LCD is bad. Either the logic to it is in error (check for an open on the E pin) or the LCD itself is non-functional. If IC cannot talk to the LCD it won't run. (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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AN OPEN LETTER TO PROFESSORS JAKE MENDELSSOHN AND DAVID AHLGREN, ESTEEMED FOUNDERS OF THE TRINITY COLLEGE FIRE-FIGHTING ROBOT COMPETITION. Wed Apr 23 00:50:42 1997 Dear Jake and Dave, Thank you for organizing such a fantastic robotic event. It was (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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| | Proximity sensor circuit on the web!
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I have posted the circuit to my web page about ten minutes ago. The address for the page is in the sig. file at the bottom. Follow the robot link near the top of the main page for the schematic. Tell me what you think. Keith Keith Soldavin (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard to Vector 2X compass
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OK everyone. I put Tom's stuff online, see the HB HP (handy board home page :-). -Fred P.S. Tom, check your color table the next time you make a GIF. Somehow your black and white schematic GIF got saved with 256 colors (255 blacks and 1 white), (...) (27 years ago, 23-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard to Vector 2X compass
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C> I'm planning to hook a Vector 2X digital compass to my HandBoard. C> I'm looking for any code for such and interface. It should be C> simple SPI stuff but I've never messed with the SPI before and C> would rather not re-invent the wheel. I've (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | serial connection
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Hi, I am still trying to get the PC-Handyboard connection to work. I got as far as downloading the pcode_hb.s19 file successfully. After I turn the main board power off and back on (reset), I should get a message on the LCD screen ("Interactive-C v (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re: I have a good schematic to post
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Hi Keith. Send it to me and I'll post it for all. Please send as a GIF not JPG as this is better for line art & text (i.e., a schematic). I can decipher just about any encoding format so use whatever's easiest for you. -Fred In your message you (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | Re[2]: Good books about electronics
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Speaking of good books: It seem the majority of books you can pick up is on "ideal" electronics. The "ideal" transistor, the "ideal" op-amp, the "ideal" circuit! What about a book that tells you when you should put a capacitor of XuF across Vcc and (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | I have a good schematic to post
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I have finally debugged my IR proximity sensor circuit and I want to post it to the group. My question is what is the best way to post it? I can put it into a JPG file but I don't want to just send it to the whole group at once. Fred, can this go on (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | hb serial connection
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Hi, I recently purchased a handy board kit, and while assembling it, ran into some "download" problems. After the memory chip and LCD were installed (Section 6.0.4 and 6.0.5 of the assembly guide) and I tried to download the IC file (dl (...) (27 years ago, 22-Apr-97, to lugnet.robotics.handyboard)
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| | 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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