 | | Re: Lego-izing the Handyboard.
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Mark -- I built a chassis for my robot that cradles the HB and clamps two Lego gear motors solidly in place. Check out this web page for photos: (URL) side of the chassis consists of two sixteen-unit beams, one on top of the other with two-unit (...) (25 years ago, 17-Jan-00, to lugnet.robotics.handyboard)
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| | Lego-izing the Handyboard.
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I've mentioned this subject before here, but I never really got an answer that made much sense... Has anybody ever tried building a reasonable "LEGO-ish" container for the Handyboard? Ideally, that would be a sturdy enclosure that still provides (...) (25 years ago, 15-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Using a 293B/293D combination
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I read on this list over a year ago that you *can* piggyback the two different chips together and still get the spike protection from the L293D. It was explained that you don't need to piggyback two L293D chips, because one spike-protecting chip (...) (25 years ago, 15-Jan-00, to lugnet.robotics.handyboard)
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| | OxOc register
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I had short circuit my TOC3 with a 5V source once. i changed the processor and the board worked. but i noticed that whenever i downloaded the pcode.s19 file, it wants to set the OxOD register instead of the OxOc. i downloaded config0c.s19 from the (...) (25 years ago, 15-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02 conversion
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(...) Sorry for two messages about the same subject but after playing around a bit more with it I got better results. Here is the spreadsheet to calculate the constants to convert the GP2D02 output to centimeters: 0.1233 1.0320 9.3078 GP2D02 Actual (...) (25 years ago, 15-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02 conversion
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(...) Actually, the GP2DO2's output is not at all linear. Plotting the output against the actual distance will show an exponential curve. Each one is slightly different so what I do is to make up a little table in Excel like: 0,0 70,10 116,15 142,20 (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Using a 293B/293D combination
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The HB FAQ mentions using the LM293B and LM293D chips in parallel (e.g., one L293D and one L293B) to gain increased current-carrying capability. My question is, if I do this am I losing the function of the spike-protecting diodes on the motor (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Fw: Whats Patrik Hui's Web adress?
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Hello Alex, My web address is: (URL) Hui Robot Store (HK) patrick@robotstorehk.com (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02 conversion
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(...) You mean like value = 10 + ((70 * b) / 256) ? --Ben (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Whats Patrik Hui's Web adress?
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Hi What is Patrik Hui web address? thanx -roboman robotman5@hotmail.com (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D02 conversion
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Does anyone how I could create a lookup table or an algorithm to convert the output of the Sharp GP2D02 (0 to 255 = byte) to values between 10 and 80 cm, which is the reading capability of the IR? Thank you, J.M. Mongeau (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: IR Question
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All of the IR sensors I've seen use a pulsed IR emitter so that the detector can distinguish between the emitted IR and ambient (e.g. sunlight). Some sensors simply measure the intensity of reflected IR, but this method doesn't work reliably unless (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | I have some simple questions
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I am a new user of handy board. I use handy board based on Mac. After I download Handy_Board_v1.2.icd, do I need to download any other thing to handy board? Now the basic function like fd(3), ao() works, but the expend function like sonar does not (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Sorry, I just try
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I am a new user of robot, I just try it! (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Robotics Show on TLC
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Anyone interested, the show is: Extreme Machines: Incredible Robots A look at robots and the long-term benefits and possible consequences of their capabilities. Rating: TV-G Category: Other, Documentary Originating Country: United States Date Time (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) The Electronic Surplus Dealer Goldmine, (URL) been selling some weather balloon electronics innards for a few years. On this board there are some relevant sensors: a thermistor, some sort of barometric chip and a humidity "device". The (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | IR Question
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Greetings, I've heard mention of the various Sharp IR sensors which can give different distance readings for different zones. Part of my final year project is to design and investigate various sensors, but I really have to generate the stuff myself (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: SPI Port
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I interfaced my Vector2X to the handyboard without using the SPI port and without any machine language. I set the compass to be in slave mode and used three digital outputs on the expansion board to control the RESET, SCLK, and SS lines. I used (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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You wrote: I then tried the LM34. There is no calibration pin and it uses farenheit. 1F=10Mv. For some reason, the output from this device varies very little with changes in the room temperature. Now the present room temperature is 58F, during the (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) Sounds like fun! Go check out the EFI332 (hope I got that right) project. That's a project to build a 68332 board to control a larger engine. They'll probably have pointers to the different types of sensors that can be used with it, some of (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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