 | | Memory peripheral device
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I,m trying to give to my 68hc11 board a memory mass storage device, like a floppy reader, or a disk, or a disk on chip, or a PCMCIA memory card interface, I found a way but I'd like to know if someone of you did something like this before me. Thanks (...) (28 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Vision on the Handy Board?
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Excuse me what is it a CAN controller ? Stefano ---...--- (...) a (...) communication. (...) to (...) transmitted (...) system. But (...) slow. (...) serial (...) framegrabber) (...) Maybe (...) the (...) useful (...) Some (...) be (...) (...) (28 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Vision on the Handy Board?
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Hi Bill we are using a NewtonLabs cognachrome system on one of our model cars. The car is equiped with a Handyboard, a cognachrom system, a camera, and a couple of RS232 to CAN converters. Our Handyboard has a CAN controller attached to it for (...) (28 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Vision on the Handy Board?
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I hade the same idea, with a parallel port camera, just to see what can happen. If I'm not wrong it is possible to use a parallel port -> RS232 interface. Am I wrong ? Stefano Falconetti ---...--- (...) recognition? (...) any (...) (28 years ago, 10-Mar-99, to lugnet.robotics.handyboard)
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| | crystals and voltage monitors
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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 (...) (28 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 (...) (28 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 (...) (28 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 (...) (28 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 (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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The attached GIF shows the Taylor series of the arcsin and arccos. arctan=arccos/arcsin. I haven't tried to implement these formulas on a 68HC11. 3 to 4 steps are quite precise already. Jeroen van der Vegt. -----Original Message----- From: Raymond, (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: basic trigonometric functions on the handyboard..
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Hi, The taylor for cos^-1 goes: cos^-1(x) = Pi/2- (x + 1/2*x^3/3 + 1/2*3/4*x^5/5 + 1/2*3/4*5/6*x^7/7 ...) (which in fact is simply Pi/2 - sin^-1) The results are very good for small x. For x close to 1 you need many many elements of that series to (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Polaroid Sonar
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Hi all, I don't know the Polaroid Sonar.... Do you have photo of it. Do you have schematics.... Thanks Dperonne@aol.com (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Serial routines for PA7 at 2400 Baud
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Hi, I read somewhere taht if i want to use pa7 with 2400 baud that i'll have to modify the LDAB 37 to LDAB 148. Is this the only change ?? If i try to use this, and i send 0b11111111 on the HB, I get 0b11000000 on the Host (if i try 0b00000000 i get (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Help!
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Hello Everyone! I have a problem with my Handyboard. Until last week everything was ok, but now.. At the moment I can put the Handyboard in bootstrap mode,and download pcode. But I do not get the Interactive C message and the beep! So I guess is a (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | 20 X 4 L.C.D Screen?
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I put in an e-mail yesterday about using a different L.C.D, I made a mistake and said it was a 20 X 8 I meant a 20 X 4. I thought that there was a way to use a 20 X8 L.C.D instead of a standard 16 X 2. My question is is this possible, I thought I (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | System time
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Hi, Have anyone developed a system time on the handy board ? Please advice me... Regards, James (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | RE: basic trigonometric functions on the handyboard..
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Wouldn't it be easier to just use the cosine function itself? x = cos y You know x, but you want to find y. Pick a y (maybe 45 deg) and calculate the x. Use successive approximation to determine y within a tolerance. Almost like calculating a (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 Sonar Problem
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I would also like to know about this. please respond. =) chen (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | Re: HB v1.2, IC v3.1 and ir functionality
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Thanx for the pointer. I got it working with some help from this list. Thanx again, Ed (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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| | basic trigonometric functions on the handyboard..
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Hi. We've been trying to build an algorithm which will allow our HB to travel between given points. We need to use the inverse cosine function (cos^-1), how can we do that? Is there a math library which contains this and other trig functions? (...) (28 years ago, 9-Mar-99, to lugnet.robotics.handyboard)
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