 | | Re: Steppr motor pulse problem
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Hi Philip, are you shure, you have the right pins from the stepper to the outgoing pins from your chip. Have your stepper 4,5 or 6 cables? If you exchange the cables, your stepper motor only do some vibrations or doing nothing. The easiest way to (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: [Interactive C features]
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You can also upgrade to IC 3.1/3.2. Among the improvements include support for multidimensional arrays. -- Randy ---...--- (...) (26 years ago, 27-Aug-98, to lugnet.robotics.handyboard)
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| | Re: [Interactive C features]
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(...) You could use a one dimensional array of length width*height such that: cellMazeWhatever[x][y] is turned into cellMazeWhatever[(x-1)*width+y] (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | [Interactive C features]
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Hello All, my name is Marcelo Manjon and i am 5th year graduate student of Mechatronics Engineering at Politechnic School of Sao Paulo University. Turns out that this year i'll be developing a Micromouse Robot using the MIT Handy Board. I have (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Analogue sonar design.
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Jeroen van der Vegt, Let me suggest some articles. First "Sonars on the Cheap" by Keith Payea page 20 of the Fall 1995 issue of The Robotics Practitioner. This looks lie about a $30 design. Second "An Experimenter's Cheap Robotic Sonar System" by (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | HB's analog inputs
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does anyone know if the handy board's analog inputs can accept analog current output(4-20mA) from a photo-electric distance sensor? (e.g. the sensor might return 4mA if the object is 1 ft away and 15mA if it's 3 ft away) or can it only accept (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | problems with main()
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I posted earlier in the week about having a problem with the SRAM. I have determined that there is not a problem with the SRAM on the handyboard. The problem is that "main()" is not executing on reset like it is supposed to. The program that I am (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Re: HB's analog inputs
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(...) Edmund, Typically the solution is to pass the 4-20 mA through a 250 ohm resistor and measure the voltage across that resistor. As long as your A/D input impedance is high, it can be ignored. A resistor is essentially a current to voltage (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Steppr motor pulse problem
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Hi, I've encounter some problem on using the stepper motor with my self-built driver. I am not using the driver in the HB. I have to build out a driver. The driver chip I use is L298 and logic gate chip is L297 or 374( this chip also use in HB) . (...) (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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| | Digital Outputs
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I have discovered that I can use PA6 as a digital output and am wondering if the same applies to PA3 if I do not require a piezo buzzer? Thank You Joe Martin joema@mpx.com.au (26 years ago, 26-Aug-98, to lugnet.robotics.handyboard)
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