 | | Diodes for Sonar Assembly
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On the official plans on the HB web site, it says to connect 6 1N5401 diodes for a voltage drop. Can I use 1N5404s instead? We got our sonar module the other day and are itching to try it out. After visiting various Radio Shacks I couldn't find the (...) (26 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: IR decode disabling
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I came across the same line in the lib_hb.c-file, hoping to achieve more performance but as I was told by Fred Martin, the default setting is OFF. Dirk (26 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: sharp gp2d12 infrared ranging sensors (fwd)
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A little known fact is that this does NOT work on inputs 3, or 6. Cutting the leads on 1,2,4, or 5 works just fine. If you cut the traces on 3, or 6, simply put a solder bridge across the signal and 5V leads to put things back to normal. If you run (...) (26 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Gleason Research
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Dear Joe Kopena: We are here and are sorry you have found any difficulty in getting a prompt response. We have no record of having received email from you yourself. We have recently faxed a quote to another party at Drexel. Perhaps your email was (...) (26 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Re: sharp gp2d12 infrared ranging sensors (fwd)
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hi has anyone successfully used these with the handyboard? i know that we have to cut the lead from the 47k pull down resistor for the sensors to work, but once doing that (we confirmed that it was cut through an ohmmeter) it still doesn't read (...) (26 years ago, 4-Apr-00, to lugnet.robotics.handyboard)
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| | Gleason Research
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We haven't been able to get into contact with Gleason, they're not answering our eMails. Has anyone else had a problem? (26 years ago, 3-Apr-00, to lugnet.robotics.handyboard)
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| | array sizes
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Hi Does anyone know whether the array sizes in ic are limited in any way other than the physical memory constraints? thanks Ross (26 years ago, 3-Apr-00, to lugnet.robotics.handyboard)
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| | IR decode disabling
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Hi everybody, I try to disable the IR decoding, as it is written in lib_hb.c that it take 11% of CPU time, and that it is default ON. So I add the line at begin of main : bit_clear(0x39, 0b00000010); to disable it. I noticed no improvement, but when (...) (26 years ago, 3-Apr-00, to lugnet.robotics.handyboard)
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| | Re: Non-volatile memory storage?
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(...) Hi, Brad, You may use one non-volatile memory to subsitute HY62256 directly. Our company has 32k non-volatile ram AS62256. Ellen Grandar Co. Shanghai, P.R.China (...) (26 years ago, 3-Apr-00, to lugnet.robotics.handyboard)
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| | RE: Non-volatile memory storage?
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Brad, I know in the Mobile robots book they used a Ram chip that had a built in battery back up, whether this would work in the Handyboard (Possible opposing voltage problem), or indeed where you'd get it from. Matt (...) (27 years ago, 2-Apr-00, to lugnet.robotics.handyboard)
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