 | | Re: IR collision avoidance
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Riachard, Could you please explain to me how the IR emitter angled at 45 degrees is able to pick up its beem. I'm unsure of the IR emmission dynamics. Wouldn't an IR angled perpidicular to the wall being travelled along suffice as the only sensor? (...) (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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| | Re: sonar,radar
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Do this: ftp://cherupakha.med...trib/kent/ Then open the readme file. It will tell you the connections. :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu Department of Mechanical Engineering The Cooper (...) (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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| | D0 - D7
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I was poking about the HB with an osciloscope and ran into a bit of confusion. I had the motor outputs ON and wanted to see the PWM effect. I was able to see the square waves but...when I poked "behind" the octal latch to see what's going on with (...) (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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| | hello everyone
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After many frustrations and down times, I've decided to move from students to cslab. Please send me e-mail at brojd_b@cslab.uwlax.edu and NOT at brojd_b@students.uwlax.edu Thanks Benny (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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| | Re: More Motor Speeds
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Where is this file: pcode.asm. I can't seem to find it. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Fun part
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Cappy, (...) I believe that the quickest, most efficient way to get a handle on C is to obtain and begin reading a book called "The C Programming Language" by Brian Kernighan and Dennis Ritchie, ISBN 0-13-110362-8. This small book describes the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Fun part
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I just sucessfully finished putting together the handyboard and will say that if one takes their time and is careful-there shoould be no problems. One observation/question. I notice that with the battery installed, the "heartbeat" character on the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Reducing Battery Pack Voltage
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Hi Fred I am attemping to run two low voltage DC motors (as motors 0 and 1), around 3V each(I don't have specs). I have piggybacked two of the motor driver chips (and maybe adding a third) to handle the higher current but they are still getting (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Reducing Battery Pack Voltage
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I think I might have wrote something wrong before. I said that you can use an external battery of 3V. I take it back. Sorry... I didn't realise that it would only work for 6 volts to 36 volts. Ooops. :b ericson mar Master of Engineering Candidate (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Reducing Battery Pack Voltage
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U can use an external battery with the HB. It can be 3V. Check the FAQ in the HB HP. The exact link is: (URL) mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu Department of Mechanical Engineering The Cooper Union for the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Reducing Battery Pack Voltage
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as has been discussed on this list, the Handy Board wasn't really designed for three volt toy motors. Reducing the voltage and doubling the motor chips is a reasonable approach, however. The Handy Board requires 7.2 volts to operate, because of the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | motor voltages
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Hi, This is in response to the question about motor voltages posted earlier tonight. Check out the archives. Late last week I posted a similar question and got some good responses about wiring the HB for two power supplies and using diodes. I have (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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Hmmm. What voltage and/or LEDs are you using? Assuming 5V, your LEDs age passing only around half a milliamp of current. I am using a 100ma LED and I can only get less than a foot of detection. Am I missing something here? Jun Nolasco (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) Those are the IR LED's - the one's that transmit the IR light that the receiver sees. Also, while I'm at it, I found out that the diagram above isn't completely accurate (I drew it from memory). The circuit I really use is like this: (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) What are the three LED's for? (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | Re: use of single power source op amp circuits with the Handy Board
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(...) The text of your question suggests many possible answers, but I would like to propose a couple of exploratory questions. More importantly it would be useful to have some global state as to what it was you were trying to do. Anyway, you can't (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | Printed circuit board
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Hi, I like to know if there is a posibility to buy a printed circuit board for a Handy Board in Holland, and if there is where can I get it ? Thanks Emiel Agema (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | help.......analog expansion header
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How do you use the expansion header on analog inputs 0 to 3? I could not find specifics on its use in the documentations. Thanks, Nathan Marcantel nathanm@mail.utexas.edu 512-272-8024 6517 Carisbrooke Lane Austin, TX 78754 (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | help ....use of op amp circuits with the Handy Board
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Does anyone know how to get a negative 5 volts from the Handy board for an op amp amplifier circuit or set equations to figure out the gain of an standard op amp as the 741 or LM339 using Vee as ground and Vcc as +5 VDC? The equations only seem to (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | use of single power source op amp circuits with the Handy Board
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Does anyone know how to get a negative 5 volts from the Handy board for an op amp amplifier circuit or set equations to figure out the gain of an standard op amp as the 741 or LM339 using Vee as ground and Vcc as +5 VDC? The equations only seem to (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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