 | | Re: Robot positioning
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William - For my group project, we bought sonar transducers and built circuits for them. Our original recieving circuit is digital rather than analog as we were only going to have one. The circuits we used are on our group's website on our (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: 6.8nF Capacitor
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I don't suppose you know what the formula is for calculating the value of the frequency ?. 1/(R4*C6) possibly ?. This equation gives 38396Hz (38.4KHz) which means that my 6.6nF caps give 39560Hz (39.6KHz) which is closer to 40KHz than the 6.8nF (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Robot positioning
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Hi Kate, I just want to know how/where to get a sonar transmitter/reciever pair with different frequencies for robot positioning. Can sonar module from Polaroid do that? Thanks, William (...) on (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Robot positioning
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If you want to return to "base," all you need is a beacon of some sort. For example, you could use CdS cells (or anything that finds EM in the visible light/low IR range) and a lightbulb (or series of lightbulbs, like a strand of Christms tree (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Melissa Virus
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I have found the source and fortunately it is not from a HB site. It was from the Washington and Lee University EE school. (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Robot positioning
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Hello all, I am currently building a H board/exp board based robot that has (will have) the following sensors: Diffrential drive wheel encoders, hamamatsu sensors combined with the software from the H board site for motor control and distance counts (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Follow-up to Virus
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It is amazing what can be recovered off a disk, with the right tools. This is the data on the virus files. The document, final1r....doc, within the zip file 478eti.zip is the culprit. "This file was quarantined.f M The file (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | File Contains Virus
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There is a file located on one of the HB sites that contains the Melissa W97 virus. It begins with 478... I am sorry that I can not give you more info as the virus scanning software removed the file, but if you maintain a server with HB files on it, (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Re: four polariod sonars
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Hi, I read the design a while back... Don't you just control the multiplexor circuit on the handyboard and then call the sonar routines? All sonar use the same routine, aren't they? -- Ray JULIAN REYES <handyboard@media.mit.edu> wrote in message (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Handyboard startup problems
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Yes, I encounter something similar. Do you use servo on your board? I also have some trouble with the motor ports. I am not sure what causes it. I also have trouble with the motor ports. When I run the motor at 50% power (back or forward), both red (...) (24 years ago, 10-Jul-00, to lugnet.robotics.handyboard)
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