 | | Here are your coupons
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Here are some coupons for you. No need to register your E-Mail address or anything else. Just print and save. Merry Christmas !! (URL) you feel that you have received this in error, please forward it back to sender and you will be removed from our (...) (25 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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| | Help with IR receive
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I just added the Sharp IS1U621 to my handyboard. That is apparently a substitute for the ISU160. When I run the simple test program: while (1) {if (4 & peek(0x1000)) fd(0); else bk(0);} my lights continuously flicker. When I put my logic proble on (...) (25 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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| | Firefighting robots
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I'm building a robot for the 2000 Trinity College competition. Since the goals of the contest are fairly complex and I'm new to programming, does anyone know of source code listings for a sumo bot? I've seen a bit of assembly source but I'm (...) (25 years ago, 16-Dec-99, to lugnet.robotics.handyboard)
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| | Mystery problem
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I have been having a weird non-fatal problem lately with my handyboard. I put some code into the other night that was simply calling the testanalogs() function on startup. The .lis file I used just loaded the hbtest.c and the file I wrote containing (...) (25 years ago, 16-Dec-99, to lugnet.robotics.handyboard)
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| | Re: servo motor design
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If you are using a Handyboard then what you probably want to do is simulate a servo motor rather than actually go through the effort of building one that behaves like the ones from a hobby shop. As an example, if you had a lego motor driving a gear (...) (25 years ago, 16-Dec-99, to lugnet.robotics.handyboard)
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| | servo motor design
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I know that designing your own servo motor is kinda stupid becoz they are abundant out there. but i'm in a competition which requires us to design our own gearbox, so i don't see a way out of it. how do i start? how do i design that feedback loop (...) (25 years ago, 15-Dec-99, to lugnet.robotics.handyboard)
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| | (no subject)
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unsubscribe (25 years ago, 15-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Driving an L298 motor driver board
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Hi, I done a PCB with the L298 H-Bridge. You just need to remove the L293D and but a special connector in the socket. You can drive motors (2) with 2A current. If you are interesting with this PCB send me a mail. kind regards, Nicolas. (25 years ago, 14-Dec-99, to lugnet.robotics.handyboard)
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| | Re: error message
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Sorry, but Interactive C does not support the "case" construct. You'll have to rewrite your code using "if...then" statements. Ross M. Tonkens, M.D. Medical Director Primary Care of Nevada 100 North Green Valley Parkway Suite 240 Henderson, NV 89014 (...) (25 years ago, 14-Dec-99, to lugnet.robotics.handyboard)
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| | Re: error message
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Kah Mun, sorry, IC does not support the 'switch' construct. re-write using if-thens. fred In your message you said: (...) t (...) (25 years ago, 14-Dec-99, to lugnet.robotics.handyboard)
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| | error message
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Whenever I run this simple program below, i get the following error message: "Fatal Internal Error: Illegal size to spew_peek_op(read local)". What does it mean?? Please help.. void servo(char balloon) { const float left_b=400.0; const float (...) (25 years ago, 14-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Inversine sine function
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This polynomial approximation looks better: ArcSin(x) = Pi/2 - Sqrt(1-x)*(a(0) + a(1)*x + a(2)*x^2 + a(3)*x^3 + a(4)*x^4 + a(5)*x^5 + a(6)*x^6 + a(7)*x^7 ) where a(0) = 1.57079 63050 a(1) = -0.21459 88016 a(2) = 0.08897 89874 a(3) = -0.05017 43046 (...) (25 years ago, 13-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Inversine sine function
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(...) You might give this a try (for -1 < x < 1): ArcSin(x) = x + a(1)*x^3 + a(2)*x^5 + a(3)*x^7 + ... etc. with a(1) = 0.1666666667 a(2) = 0.0750000000 a(3) = 0.0446428571 a(4) = 0.0303819444 a(5) = 0.0223721599 a(6) = 0.0173527644 a(7) = (...) (25 years ago, 13-Dec-99, to lugnet.robotics.handyboard)
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| | Inversine sine function
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Hello, I would like to calculate an inverse sine (arcsin) function for one of my application. Does anyone know the algorithm of this trigonometric function? Thank you, J.M. Mongeau (25 years ago, 13-Dec-99, to lugnet.robotics.handyboard)
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| | Re: L298 Motor Driver
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If you don't already have the L293D chips it would give you more current capability if you used the SN754410. It is pin compatible with the L293D and supplies 1A continuous versus 0.6A for the L293D, and they can be stacked just as Kam suggested for (...) (25 years ago, 13-Dec-99, to lugnet.robotics.handyboard)
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| | RE: L298 Motor Driver
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James, Have you considered stacking two L293D chips on top of each other, solder the legs together and add a heat sink? You should be able to drive motors in the 1A range. Just a thought. -kam (URL) (25 years ago, 13-Dec-99, to lugnet.robotics.handyboard)
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| | Driving an L298 motor driver board
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I'm trying to drive 2 larger DC motors that draw about 1A each. I am using a L298 motor driver board that is sold by HVWTech. I would like to drive it straight from the Handyboard and I'm wondering if I'm going about this correctly. Am I correct in (...) (25 years ago, 12-Dec-99, to lugnet.robotics.handyboard)
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| | Infrared receiver
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Hello, I'm currently doing a project that requires emitter and receiver, but I have a problem. For the emitter circuit, pulses is received from the programmed that I've programmed into the Xilinx, it then sent the pulses to the emitter and the (...) (25 years ago, 12-Dec-99, to lugnet.robotics.handyboard)
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| | Re: silly question or not??
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No, its not a stupid question. Just impossible. At least kind of impossible. If you want 32 more outputs using the board as-configured, forget it. With what is available for chip selects minus what you have used already, you can get 16 more. All (...) (25 years ago, 11-Dec-99, to lugnet.robotics.handyboard)
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| | silly question or not??
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Im sorry if this is a stupid question....... no1 has answered..... or does no1 know???? Hello everyone... I hav already connected a hc374 to Y0 of the expansion bus to get 8 digital outs, It works gr8. I need anouther 32 outputs which meens I need 4 (...) (25 years ago, 11-Dec-99, to lugnet.robotics.handyboard)
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