 | | Vector 2X Compass
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Hello - I'm having some trouble figuring out how to wire Precision Navigation's Vector 2X Compass for use with the Handy Board. I've checked out the files in ".../software/contrib/tomb/" on the Handy Board site, but I'm sort of at a loss. Due to the (...) (25 years ago, 30-Nov-99, to lugnet.robotics.handyboard)
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| | Re: evaluate inverse cosine, sine in IC
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Another technique for finding trig functions and their inverses used by both HP and TI in their calculators is the CORDIC algrorithm. A description of the technique with lots of references can be found at: (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: evaluate inverse cosine, sine in IC
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Taylor series should converge quite rapidly. After 2 or 3 terms, the error is usually neglectable (depending or your demands, of course: this should be fine for up to a few decimals) For those not familiar with the Taylor expansion, I've added a (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: servo program, addendum
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Dear ? The initialization function is: enable_expbd_servos(1); per the latest library routines see handyboard web site. Bart Schrijver. ___...___ Reply Separator ___...___ Subject: servo program Author: Non-HP-dab8rs-85 (dab8rs_85@yahoo.com) at (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: servo program
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Here's a simple program that will make a servo move as the knob on the Handyboard is turned: int i; void main() { init_expbd_servos(1); while(1) { i= knob(); i = (i*10)+1000; printf("val %d\n",i); msleep(20L); servo0 = i; } } (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: servo program
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Dear ?: First off, your program contains an infinite loop; statement return(0); will never be reached. Also you told it that main does not return a value, yet you used e return in the end. This will generate a compiler error for sure. I belief the (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: evaluate inverse cosine, sine in IC
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I've been trying to do this as well. The problem I have found is that the Taylor series expansion needs to be developed near the solution to get accurate results. Some may wonder why finding the arcsine of a number might be of interest. If one has a (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | servo program
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Can anyone please write me a brief servo motor program that will control two servos from the expansion board? This the one I had to control one, but did not work: void main(void) { while(1) { init_expbd_servos(1) servo0 = 1000 } return(0); } (...) (25 years ago, 29-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Opto isolator
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Hi Tim, Try (URL) and (URL) seems to be a huge variety of MOC3x series optoisolators to choose from. You might be able to find a substitute for the MOC5003 or 4 that you're looking for. Good luck, (...) Great minds discuss ideas; Average minds (...) (25 years ago, 28-Nov-99, to lugnet.robotics.handyboard)
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| | Opto isolator
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Hi, I was wandering if anyone knew where I could get a MOC5003 or MOC5004 opto isolator. I tried looking on the motorola web site but could not find it. Does any one know where I coul something similiar to this that works the same way. TIM ___...___ (...) (25 years ago, 28-Nov-99, to lugnet.robotics.handyboard)
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