 | | 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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| | Shaft encoder sensors...
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Can anyone help? My team is trying to get a shaft encoder to work, but cannot find a chip that will work correctly to count the black and white stripes on the wheel. We would like to use a chip which can be connected directly to the digital inputs (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Stupid Sonars
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I have a extremely complicated two polaroid sensor set up going on... I had a diode connected to each of the ECHO lines so that I can combine the two lines together... However, no signal passes through this setup... However, I have validified the (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Timer display
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Hi, I would like to display a clock on the LCD display using the real-time interrupt of the 6811. But it does not seen to work at all. Does anyone have done a similar clock on the handyboard ??? Regards, James (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | Re: IR output
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In response to: (...) Could a hardware expert (Fred?) please give a more definitive answer to this? What value resistor should be used? After extensive IR use with just an IR led and no resistor my transmission circuit eventually died... I guess I (...) (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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| | lib_rs.lis, nevermind.
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Sorry, I wasn't thinking, doh! (26 years ago, 22-Feb-99, to lugnet.robotics.handyboard)
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