 | | I hope someone can help me...
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I am planning on getting some LMD18200 motor driver chips from National Semiconductor and I found some info about which pins go to what by doing a search in the H-Board archive. Great resource by the way. It expalains how to take one of the standard (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Polaroid Sonars
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Hi everyone, It seems that the world's Polaroid Sonar reserve is almost depleted. Polaroid is currently in the manufacturing process to produce more. The company www.acroname.com still has them in stock if anyone is interested. ---...--- ericson mar (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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Capacitance is calculated using the area of the plates, the dielectric constant, and the distance between the plates. It does not have anything to do with the voltage. If a thicker dielectric is formed, it will reduce the capacitance. This is not (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | RE: new intranet ip
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(URL) now points to the new site also. Doug -----Original Message----- From: mark williamson [SMTP:markw@tabnet.com] Sent: Friday, March 19, 1999 2:42 PM To: Andy Stevens; Brad Davis; Brendan Benzing; Caitlin McGillicuddy; Carlie Ross; Chris (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Electrolytic Capacitor Ratings [was Re: Choosing Parts?]
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(...) listed (...) Your comments aren't taken as being harsh, but I'm still not sure I agree. Now I must say that my comments are based on something I heard in the rummer mill, but it still sounds plausible. What I heard goes like this. Electrolytic (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid Sonar
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Greetings, Acroname has them on their parts list, though I am not certain if they have them in stock (www.acroname.com). Marco A. A. de Oliveira assfalk@eece.unm.edu /---...---| /---...---/ CNPq Scholarship Awardee | | Research Asst. | | | ACE SMR (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | handyboard clock speed
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Ive checked the mailing list archives and i cant find a simple answer to the following question: Is it possible to run the HB at >2Mhz? That is, can I run a different version of the 6811 perhaps and get 8Mhz? What are the advantages/disadvantages? (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Mobile Robot Question
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(...) Can anyone answer all that? I think the answer is "it depends". Unfortunately it depends on so many variables that you'll just have to implement one system at a time, checking each thoroughly and modifying as you go. Make sure to go back and (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid Sonar
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(...) The Mondotronics Robot Store was selling them, but the price wasn't great. Instead of about $50 per transducer/board combo, they were selling pairs for $150 last time I checked. -- Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Choosing Parts?
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(...) I don't mean to be harsh, but this isn't exactly correct. The voltage is the highest the capicitor is rated for. if you have a 12V circuit it won't hurt to put in a 200V cap, but you'll need lots of room. Generally for safty, in high current (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Choosing Parts?
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In a message dated 4/21/99 1:08:33 AM Central Daylight Time, josr0633@cetus.zrz.TU-Berlin.DE writes: jos runarko: (...) For electrolytic capacitors, you want the printed voltage to be the closest voltage above the voltage you are operating at. The (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
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| | Choosing Parts?
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Hi, in Katalogs, there are many capacitors with the same capacity value but different voltage and tolerance. My question is, which voltage should I choose: above the operating voltage of 12 V? Second, the tolerance the lower the value it has a (...) (25 years ago, 21-Apr-99, to lugnet.robotics.handyboard)
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| | Re: help on replacement part
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yes. fred (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | Mobile Robot Question
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Hi, I'm building a mobile robot using an R/C car with an Electronic Speed Controller (ESC) as the mobile platform, the Handyboard for sensorial data aquisition, and servo control; and a Linux "box" for GPS, videoconferencing, wireless (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | help on replacement part
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Can anyone please tell me if a 50 v replacement for part C7 and C9 will be ok instead of the normal 63v one? -Jon Schuck (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | Polaroid Sonar
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Anyone know where to get a Polaroid Sonar besides Wirz elevtronics and Polaroid Corp? They are both out of the product. Thanks for any input. ---...--- ericson mar Robotics Consultant mar@cooper.edu (212)353-4356 Department of Mechanical Engineering (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500
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Scott Sherman, My name is Fabian Lopez and I am to begin hooking up a polaroid sonar transducer to my handyboard.....any words of wisdom. Hola from New Mexico (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | Spurious IR signal
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Dear IR users, I recently have begun experimenting with IR sensing for my HB by using an IR led and a 3 pin detector (Everlight IRM8100-3-M available from Radio Shack, cat no 276-137a). The LED is driven by a 38 KHz square wave (50/50 duty cycle). (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | GP2D12
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Looking for this part. Does anyone know where to get it? ---...--- ericson mar Robotics Consultant mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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| | Re: GCC/HC11 small patch
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Patch 1.2 to the GCC/HC11 compiler is now available on my FTP site: ftp.eskimo.com/u/a/a...est.tar.gz This new patch includes the patches by Otto Lind, Dr. Steven Barnicki, Keith Hearn, and myself. It is patch 1.2. Also, I put the latest snapshot of (...) (25 years ago, 20-Apr-99, to lugnet.robotics.handyboard)
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