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Hi. Does anyone have current part numbers/vendors for the 8MHZ crystal and the U12 Voltage Monitor on the Handy Board? Are the correct values available from digi-key? I saw they carry both crystals and voltage monitors, I just don't want to order (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Vision on the Handy Board?
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Has anyone tried to connect some sort of a camera to the HB? Would I be asking too much of the 6811 processor to do some simple pattern recognition? I was just curious to what extent I could push my board to. Thanks for any info! Bill Denzel Senior (...) (26 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: HB v1.2, IC v3.1 and ir functionality
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Dear Edward, I don't think you need the r22_ir.lis file.The file sony_ir.icb is available at (URL) . Yours sincerely, Nitin (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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Dear Berg, You can perhaps express cos^-1 in the forms of a Taylor series and use that series for finding the approximate value. I have however not tried it. There is no math function for inverse cosine.Refer to handy board manual available (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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A Taylor series isn't the way to go: they converge far too slowly. Here is a polynomial fit to arccos(x): arccos(x) ~ = 1.5708 - 1.0927 x + 4.358 x^3 - 0.8340 x^5 It differs from the exact value of arccos(x) by no more that 0.08 radians (4.6 (...) (26 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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