 | | Parts availability
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To all: I am constructing the Handy Board from 'scratch', since many places want upwards of $200 for a built (and tested) board. I have located most of the required parts, but have not located the following: the 1 uH iron core inductor the 5W 47ohm (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | How to measure the signal Voltage ?
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Hi Everybody, I am using the retroreflective sensor to an object . The sensor is came from Masushita NAIS brand name. It has 3 wires . ONe for the +ve supply , one for the -ve supply, one for the output signal line. The sensor is using a NPN type. (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Print to LCD
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Hi everyone, Does anyone know how to print messages to the LCD in assembly language. Thanks (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | RE: External Motor Power and the Expansion board.
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I noticed this to when I built mine, I just bridged the gap I had cut with solder and now use an H-bridge to control the motors. Clancy (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Problem resolved?
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To all, Regarding my previous... I am not sure if it was a soldering connection, but after retesting the output voltages it is very close.. Fred says that the voltages should be between, say, +9 and +10, but I'll get a 8.7.. Is this good enough? If (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | MAX232 Chip
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To all: I am constructing my first Handy board. I am currently building the interface board, but have hit a small 'snag'. While performing 'step 2', installing capacitors and MAX232, and then testing, I did not recieve the correct voltage outputs. (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: External Motor Power and the Expansion board.
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ahah, good question. the exp bd grabs the 9v motor power for the servos, sonar, and 9v lego sensors. if you're not using any of these, you could leave connector off the exp bd and you'll have no probs. if these are important, you need to reconnect (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | External Motor Power and the Expansion board.
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Greetings all! I just got the kit for the expansion board in the mail, and I realized something: I modified my handy board to accept external power for the motors through the power expansion header, using the instructions at: (URL) and now I don't (...) (26 years ago, 24-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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The modulation frequency of the IR diodes must match the sensor (depending on exact part number, around 38 KHz) within +/- 3 KHz. As you move away from the center frequency, detection drops off sharply. Are you able to confirm the modulation (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | ICC11v5 - interrupts
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I have a HB (running under IC3.2) that is linked to a 'slave' TCOMP board (68HC11E1, 32k ram) which is programmed using ICC11v5. I need a function similar to 'msleep' on the TCOMP unit. I am trying to use portions of Chuck McManis' HB library for (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 and assembly language
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Hi, I have the same problem. For now I don't care since the GP2D02 is the only thing connected to an digital output. I am using the following: Include: subroutine_get_userval: ldab USERVAL ; load USERVAL to d register clra ; clear upper byte rts ; (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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(...) You can download the archives from the HB web site: (URL) Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, A liberal is a man too broadminded Will Bain, to take his own side in a quarrel. & (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Tracking device
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Chen, I am no expert on computer vision, but Greg Hager of Yale University's CS dept. gave a talk at our school last week about developing function libraries for visual tracking. His web page is (URL) It seems relevant to what you are trying to do. (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Tracking device
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(...) If you are trying to track something moving, it is pretty simple, if you have a fixed camera. Take two images, separated by a reasonable amount of time (2 subsequent frames may not be enough). XOR the two frames, everything the same will show (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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I am new to the list and want to know if there is anykind of archives of old e-mails to the list as I would like to see them. Thanx ___...___ Steve Wall Sir Sandford Fleming college Swall@flemingc.on.ca (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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(...) I don't think "Less sensitive" and "Sharp IR detector module" go together. When they designed that module, their goal was to make a device as sensitive under all types of conditions. It compensates for changes in ambient light and in flashing (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Tracking device
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hello everyone. my team has been assigned to make a tracking device for our robot making use of a video camera or the camera on this silicon graaphics computer in the lab but i'm not exactly sure how to begin. any suggestions or words of wisdom (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Book Review ??? -Reply
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I bought the "Personal Robot Navigator" last year. The book focuses on the simulation software (came with the book). There is almost no hardware discussions at all and I found that frustrating (especially after reading "Mobile Robots"!) The model (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Stupid Sonars
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Try connecting a 4.7K pull up resistor to VCC on the ECHO pin before the diode. the echo pin is open collector and pull up is provided by the handy board digital input when used as described in the handy board instruction. When you add the diode (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Sharp GP2D02 and assembly language
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Hi, I've written a short assembly language routine to access the Sharp GP2D02 sensor and it works just great but... I have one question. Since I use the expansion board's digital outs to control the sensor I need to make sure my routine doesn't (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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