 | | 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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