 | | Re: Non-polaroid Sonar
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Hi all, I'm now building the ultrasonic sensor from kam leang's page, did anyone interface it with handyboard?? Can anyone give me some advice on driving it? thanks Frankie Lai 97139371d@polyu.edu.hk (...) to bit_set and bit_clear is not actually (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Non-polaroid Sonar
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(...) No, that's a very good question. It had me confused, too. The second argument to bit_set and bit_clear is not actually the index of a bit at all; it's a bit mask. For example, when you do bit_set( 0x1021, 3 ), the 3 becomes 0000 0011 in (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Polaroid setup w/ exp board...
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John Wynne wrote: <snip> (...) Making the connection to the transducer by hand will very likely damage the electronics on the sonar module board. It says in the Polaroid instructions never to operate the sonar with the transducer disconnected. You (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharge Battery
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(...) Actually, if you had stored them fully discharged then they would likely be as good as they day you bought them. That is the best way to store NiCds. However, if they are kept at a C/100 trickle charge to prevent open-circuit discharge, they (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Vector 2X driver
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Yes, I run my Vector 2X is slave mode using only IC. I don't worry about missing the last bit since the precision of the heading is only +- 2 deg. It's very simple to code up. -Scott (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Non-polaroid Sonar
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Thanks for your help :-D Just so I'm clear, ref pink book page 10-17. Does the "bit_set( 0x1021, 1 );" refer to bit 0 -EDG3B, and bit_clear( 0x1021, 2 ); " refer to bit 1 -EDG3A. This is what was throwing me, I always thought bits started at zero (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: windows nt and handyboard
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I am also using the icwin from newton labs and that works fine also. Although I have not tried it under win2k, which I must do soon. --peter (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharge Battery
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Im going to jump in here on this one and give an opinion. C/10 for a NiCd is a little much for a trickle charge. C/10 on NiCd's is usually considered more of a trimming type of charge following a higher charge rate of C or C/2 to put the bulk of the (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: windows nt and handyboard
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(...) Actually I am working with Linux, but I gave it a try and it worked just fine. I tested with MS Windows NT Workstation 4.0 Service Pack 5. Just open a command prompt and use this ic-version. (URL) There is no admin-account needed. Perhaps you (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Polaroid setup w/ exp board...
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Hello, I am trying to setup the 6500 polaroid sonar package, but am having a little difficulty. I've soldered a .1uF cap (electrolytic) into the C7 space on the ranging board, connected a 22g wire from J12 to input 7, etc., etc. My problem is in (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | windows nt and handyboard
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Hi, Please, someone that is working with the handyboard and windows nt can tell me if do you have any problem in communicating the serial port with the handyboard? Do you think that the handyboard could be connected by serial port with windows nt? (...) (25 years ago, 16-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharged battery?
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(...) OK, this is good to know. (...) Yes, *if* more drop is necessary, more rectifier diodes would be called for (i.e. relatively fixed voltage drop), not a series resistor (v=iR). (...) I didn't have any 5watt resistors handy, so I put a pretty (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharged battery?
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(...) Hi Fred, I don't claim to be an expert on these, but what I have read leads me to believe that this may damage the cells if left on too long. For common NiCds (800mah AA' for instance) C/10 should really be considered a fast charge and not a (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Re: problem with sonar
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A 470 microfarad electrolytic capacitor across the power leads to the sonar board will probably fix your problem. You can get a lot of current really fast out of one of those things. I remember charging them up and tossing them to one of my friends (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | problem with sonar
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Hi.. I have a problem with ultrasonic sonar power supply, hope anyone can help me.. thanks.. I run my sonar well with the exp. board using transformer, but i failed to run it together with 2 sharp GP2D02 IR, i think may due to 2.5A surge of the (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Hitachi LM052-L
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Jan, Do you have the expansion board? If so, have you tried removing it and seeing if the display works on the Handy Board by itself? What makes you think the display is damaged? What are the symptoms? Does IC still work, even though the display is (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Hitachi LM052-L
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Hello, my Hitachi LM052-L display is damaged. Does anybody know where to buy a new one or equivalent in Europe ? Or how to test which part is damaged of the handyboard display system or the display itself ? Thank You ! Jan Luijk Netherlands (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Q: 10 dc motors on handyboard?
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Does anyone know if handyboard can run more than four dc-motors? I want to be able to control a complex lego construction, with full control of all motors at once. The current flow shouldn't be to dramatic, I hope. I would also like to ask how it is (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharged battery?
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hi dennis, well, it's just a plain C/10 charge circuit. but i was under the impression that nicad's aren't damaged by that. it's possible i'm wrong :-). any other battery experts out there? fred In your message you said: (...) ly (...) ut (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Overcharged battery?
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(...) I was guessing here - most chargers don't check for peak charge, since I didn't know if the Handiboard charger did or didn't... If the charger has a trickle charge of more than C/50 or C/100 then NiCds will be damaged eventually on a long-term (...) (25 years ago, 15-Mar-00, to lugnet.robotics.handyboard)
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