 | | Re: HandyBoard A/D converter?
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The 68HC11 has references for the range of the A/D converter. In the HB design they are hardwired to 0 and +5. I believe the pin is Vrh at (URL) and is currently wired to +5. --chris prosser From the motorola manual: 2.2.7 A/D Reference and Port E (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | Re: colour sensor caliberation
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May I suggest you test your system for response to invisible light? You could shine an Infrared LED onto it to see what you read. There are also "UV Cutoff" Filters available at photography shops supplying color darkroom equipment (UV from the bulb (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | Re: KIPR Kit
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Hi, In the kit you will find a number of pulleys about 1 inch in diameter. These are narrow enough to fit through the sensor. They have six holes in them and if they are on an axle, will give you 12 pulses per revolution - 2 pulses per hole. One (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | HandyBoard A/D converter?
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Dear Handy Board Masters, I am trying to use the handy board for some A/D conversions. The converter is set up on a 5 volt scale, the converter is an eight bit converter. Over this range I get a resolution of 19.5mV per Step. My application is (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | LUGNET spammed (was: Semiconductor Specific Search Engine)
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Hey, folks, (and Todd Lehman in particular) Did you catch this spam over in lugnet.robotic.handyboard? I hope that this trend doesn't continue. :^( LUGNET is one of the few Internet institutions I use that is nearly 100% content, and spam-free. (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard, lugnet.general)
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| | colour sensor caliberation
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Hi all I mailed the list a few weeks back about implementing a colour sensor. someone suggested using three photo resistors with red, green and blue filters over it. I have built the sensor with four photo resitors, three with the different filters (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | A/D converter
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Dear HB, I am trying to convert an anolog voltage from a thermocoupler to a digital value and display it on the LCD. I thought this could be accomplished by changing the high reference voltage V(rh) from the default 5V to 600mV to get the max (...) (25 years ago, 26-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Using ICC11 with the handy board
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John, The 1 KHz system interrupt is set up in the IC pcode, which you are not loading. Furthermore, the bootloader for the Handy Board is loaded into the first 255 bytes of on-chip RAM when you load pcode, and disappears on reset. It can't cause you (...) (25 years ago, 25-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Using ICC11 with the handy board
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Hi John, Using compiled programs with the Handyboard is not difficult, the steps used to download a compiled program are exactly the same as downloading the "pcoder" file in the Handyboard documentation. The compiled program is used instead of the (...) (25 years ago, 25-Feb-00, to lugnet.robotics.handyboard)
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| | Using ICC11 with the handy board
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Dear Sir or Madam, Let me preface this email by saying that I am an extreme novice at programming microprocessors so please try not to laugh to hard at my questions. I recently started an electronics project for which I chose to use the handy board (...) (25 years ago, 25-Feb-00, to lugnet.robotics.handyboard)
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| | KIPR Kit
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Is anyone else using the Mobile Robot Development Kit from the KISS Institute? I was curious to see how other people had mounted the break beam sensors which come in the kit onto LEGO pieces. I've been having a lot of trouble getting them aligned (...) (25 years ago, 25-Feb-00, to lugnet.robotics.handyboard)
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| | Semiconductor Specific Search Engine.
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Semiseek now has the latest Semiconductor News and New Product Announcements from the Manufacturers of Semiconductor Equipment. Follow the latest Industry trends. Submit your Company Press Releases and New Product Announcements. See the most popular (...) (25 years ago, 25-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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(...) you are confusing mAh capacity (the amount of energy stored in the battery) with how fast the batt can deliver the power. the two are not the same. the fuse is in the design because nicad cells can deliver a *DANGEROUS* amount of power if (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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(...) CAVEAT: I'm probably full of it, but here goes.... My understanding is that a 12 V NiCd battery pack would not damage the HB, since the HB can handle up to 12 V. The problem is that in order to charge a 9.6 V battery pack, the HB built in (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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(...) The self-resetting thermal fuse that's part of the HB ought to be just fine (see item F1 on the HB schematics). I think that if you use a 9.6 V NiCd battery pack with less than a couple thousand mAH capacity, you probably have nothing to worry (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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Is there a general guide to what fuse I should have with a certian current? Please excuse some of this if it doesn't make sense, I am learning a lot of electrical concepts as I go... Would the internal resistance of the battery be shown if I measure (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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(...) Yes. Exactly the right point. The two different things to woory about, are the mA/Hr rateing of the battery (which tells you how long a particular current can be delivered), and the _internal resistance_ of the battery, which limits the (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: L297
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(...) If you mean "bipolar" (like floppy head-motors) motors, than i think that i can help you :) -- sincerely Mike Schubert _ |_| Mike Schubert Tel.: ++49-351-3 18 09 15 | |__ interface business GmbH Fax.: ++49-351-3 36 11 87 | |_ | Naumannstrasse (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: Just some questions...
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(...) use a (...) mAh (...) Oh, you are missunderstands some "electrical" details :) You can use a battery pack with 9.6V and 2000 mA or more if you like, because the unit is exactly mA/h. It means you can get this current over a time of one hour. (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02
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(...) Hi, I have a bunch of information about interfacing GP2D02's at this address: (URL) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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