 | | Re: RF transmitters
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(...) A simple way to get rid of the DC component is to run the data through a scrambler on the TX side, and descrambler on the RX side. This has been done successfully in 9600 baud amateur radio TNC's. 2 or 3 chips on each end of the link is all it (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | RF transmitters
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(...) We did use 900 Mhz Radio Shack RF headphones (cat # 33-1145), which gave us a reasonable analog transmission (the transmitter took L+R RCA audio in, and the we connected in place of the speaker on the receiver). We could get 9600 baud through (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | RE: (no subject)
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(...) If anyone can find Proxim RXA-1000 radios (900 Mhz, Direct Sequence Spread Spectrum), I wrote code for a Handyboard to program the synthesizer. You have to program two registers serially, and then must program one of those registers each time (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Spread Spectrum
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<bold>Fred Cass,FCass@nextwavet...m,Internet writes: </bold><x-quoted>I would also be interested in hearing if there are any inexpensive (<<$500), easy to implement wireless comm solutions. Perhaps spreadspectrum 900mhz, or RF...</x-quoted> By (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid Ultrasound
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Polariod OEM Components Group (617) 386-3965 ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Re: (no subject)
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Fred Cass, Seems like I remember reading in NUTS and VOLTS, or somewhere, about Randy Sargent and his partners involved in a competiton, using a Radio Shack AM transmitter on their robot. It gave details on how they interfaced it. Sounded pretty (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid Ultrasound
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(...) Try (URL) is where I bought my sonar transducer and ranging board for $50.00 +5.00 S/H. It came within a week and the quality is great. Keith Keith Soldavin kas219@email.psu.edu (URL) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Accessing 2nd line of display
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Howdy, One simple question. Is there a direct way to access the 2nd line of the display. Something like: printf("first line\n"); printf(?????); /* move cursor to second line */ printf("second line\n"); Thanks, Clay Timmons ctimmons@asic.sc.ti.com (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | RE: (no subject)
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(...) I would also be interested in hearing if there are any inexpensive (<$500), easy to implement wireless comm solutions. Perhaps spreadspectrum 900mhz, or RF... Thanks, -=Fred Cass=- (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Polaroid Ultrasound
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Where do people get their Polaroid or equivalent ultrasound sensors... the kind which are ready to be used, with circuit and everything...? Sincerely, Yoni Garbourg << To succeed, Atificial Intelligence needs 1.7 Einsteins, two Maxwells, five (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | (no subject)
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I think I know why it is so quiet...... There is only 3 weeks of school left! Exams and finals are coming up soon. well, I do have a question: Has anyone tried making a larger robot, like bigger than your average dog? I'm thinking about it, and (...) (27 years ago, 8-May-97, to lugnet.robotics.handyboard)
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| | Re: Data, are you out there?
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(...) Sounds about right. Some displays are worse than others. I just happened to get one with a contrast that wouldn't work well until I did the above mod. As I recall, out of the first there pins, one is +5V, one is GND, and one is the contrast (...) (27 years ago, 7-May-97, to lugnet.robotics.handyboard)
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| | Data, are you out there?
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HELLO.....Hello........llo....... Is anyone out there? I've been on this board since the beginning of the year...this is the quietest I've ever seen it. I sure miss reading all the questions and comments. Has anyone tried adjusting the contrast of (...) (27 years ago, 7-May-97, to lugnet.robotics.handyboard)
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| | Mobil Robotics Jones/Flynn book.
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I have a Mobil Robots book for $25. If interested respond to kvclark@juno.com (27 years ago, 6-May-97, to lugnet.robotics.handyboard)
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| | (no subject)
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(27 years ago, 6-May-97, to lugnet.robotics.handyboard)
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| | Problems controlling RC Servos
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Some time ago I tried the use of the HB to control a RC Servo using the single servo control software that was available in the HB web page. At that time I made it work and everything seemed to work fine. Yesterday I tried to do it again. (...) (27 years ago, 5-May-97, to lugnet.robotics.handyboard)
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| | Re: I think I blew my HB :(
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(...) All I know is I lost all functionality, i.e. program no longer ran. I poked for the problem, found I had 5V, and then found Ray Butt's Tcomp. I just opted for the easiest solution. It was a natural evolution for me, because I needed to be 'E1 (...) (27 years ago, 5-May-97, to lugnet.robotics.handyboard)
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| | Re: IR o/p
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(...) some questions on the IR transmitter..... This is what i get on my scope when i connected the +ve to the (...) ------||-------||---...----||---- (...) 40KHz, ie(25microsec) is it the time period of the high (...) (27 years ago, 5-May-97, to lugnet.robotics.handyboard)
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| | Bot Base FOR SALE
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Unfinished BOT BASE: $25 (includes shipping) Mobil robot base simular to the Rug Warrior. made out of 2 6 inch clear Acrylic plastic circles. 2 modified servos with rubber airplane wheels. and ping pong ball rear caster. Respond and ill send a email (...) (27 years ago, 5-May-97, to lugnet.robotics.handyboard)
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| | Re: I think I blew my HB :(
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So you only recovered the power supply? Everthing else was bolwn up? I tested my motor chips and they appears fine so far as I can tell. I also had external circuitry with some cmos logic (inverters) and they were fine too so I imagine the latches (...) (27 years ago, 5-May-97, to lugnet.robotics.handyboard)
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