 | | 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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| | Re: electronics question please help
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Eric - - You might try shielding the IR sensor ... add successive layers of "Scotch" tape until you get the desired sensitivity. I'm using layers of black plastic trash bags ... it blocks a lot of visible light, but very little IR. - - - Nick - - - (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: L.E.D. question.
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Typical drop across an LED is about 1.45v. A unit rated at 5v likely has a build in voltage drop/current limiter (read resistor). I would suggest reading the info sheet for absolute ratings. In general, 'any' generic LED will work. Buy the cheapest (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: HB to create video displays?
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At 03:25 PM 2/22/99 -0500, Steve Wall wrote: [snip] In short I want to be able to watch the monitor and have (...) Checkout Decade Engineering's Bob II board at: (URL) I don't think it can do graphics, but it accepts serial input at 9600 baud and (...) (26 years ago, 23-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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(...) Been there, done that! Funny. I bought almost all the same stuff from my local shack. Writting the software was the easy part ;^). (...) I've supplied some power to the inverter, yes. I'm assuming it's mandatory to have the inverter actually (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: lib_r2.lis ?
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Dear Mr Pennington, Have you configured IC using ic -config command ? This sets the library file and its directory. For handy board, the library file is lib_hb.lis.This is a list file which contains the words lib_hb.c and lib_hb.icb. The lib_r22.lis (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Visual Basic and parallel port
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i know that this doesn't really have anything to do with the handyboard but has anyone tried to access the computer's parallel port with visual basic? =) chen (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: electronics question please help
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Bob - - Here is a link to the 74HCT04 data sheet: (URL) that this helps. - - - Nick - - - Bob Kelly wrote: <snip> (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | electronics question please help
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Hello all, I hope there is a simple answer for this... I have attempted to build the circuit that will allow IR object detection using the Sharp IR detector module and a pair of "high output" infrared LEDs. The circuit I built was the one from (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Book Review ???
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Does anyone have any comments about "The Personal Robot Navigator". It is sold by (URL) about $50. I have read (and continue to read) "Mobile Robots: Inspiration to Implementation" and think it is a *must read*. TIA - - - Nick - - - (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR question
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(...) I just looked over the code again, and you're right, I see no reason why it shouldn't work. I guess the comment is just left over from a previous version where it did make a difference. This is not something I can test though, so I'll have to (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | HB to create video displays?
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I am thinking of putting a wireless board-level color or B&W camera on my Mobot and I have a question for all the techies. Is it possible to use one of the different outputs on the HB to interface with the camera to put diagrams on the live picture? (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Need Handy Board memory debugging software
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Gentlemen: I'm having a bit of trouble with my handy board's display. The board itself works, and I've swapped out old display for a new one. I suspect the memory or transparent octal addressing latch to be at fault. I understand you've memory (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Shaft encoder sensors...
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Zagros Robotics sells them for $7.00 ea US (URL) Message----- From: John Vaughn <vaughn@HWS.EDU> To: Kat <khorvath@up.edu> Cc: handyboard@media.mit.edu <handyboard@media.mit.edu> Date: Monday, February 22, 1999 10:23 AM Subject: Re: Shaft encoder (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR question
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I found that article listed at: (URL) It was in the January 1999 issue, titled: "Multiprocessor Communications Part 1: Methods for Communicating " Maybe it wasn't 68HC11 specific after all. Gerald (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | RE: IR question
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James, I'm not sure if this is the correct answer since I am new to the Handyboard, but I think it is: If you do not disable the IR Input Interrupt, your transmission could be 'interrupted' by the receiving information and this may mess up your (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | IR question
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Hi Max Davies and everyone, In your documentation (irinfo.txt), you said that we need to disable the IR input interrupt routine before transmitting another signal, what is the reason behind that ? As the IR input and output are both interrupt driven (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | L.E.D. question.
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What are the L.E.D. voltage ratings for the L.E.D's on the interface board I purchased one(at Radio shack) with a rating of five volts. Which should be O.K right? any help would be appreciated. I have to improvise to get such components cheap. Thanx (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Shaft encoder sensors...
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Kathy, Digi-Key has three kinds. The first two look like the "Mobile Robots" type: QRB1114QT-ND $1.58 QRB1134QT-ND $2.83 The third one looks like a much more compact arrangement: QRD1114QT-ND $1.50 These are on Page 552 of the January-March catalog. (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Shaft encoder sensors...
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(...) The Hamamatsu P3062-01 IR photoreflector mentioned in MR was discontinued and replaced by the P5587. This chip has the identical pinout and dimensions as the original. I ordered several from Hamamatsu last year but they are pricey (~$7/ea) in (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | photoreflective sensors
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Kathy($B!)(B) wants photoreflective sensors for shaft encoder. How about the products of Toshiba? See (URL) ***...*** takatsu@isenshu-u.ac.jp School of Science and Technology, Ishinomaki Senshu University 986-8580 Ishinomaki, Miyagi, JAPAN (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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