 | | Re: Sonar Multiplexor Question
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You get 4 SPI output digital ports in the HB. Read the section in the FAQ about the HB's digital outputs. These 4 can be used to select your transducer. You can pull one motor driver chip and get 2 more digital outputs. Kent has routines that uses (...) (27 years ago, 3-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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(...) I notice that Adam's circuit uses all 4 available SCI outputs to select the transducer, but the sonar board itself requires two of them already. Why not just get a 2-to-4 line demultiplexor, and use the remaining 2 SCI outputs to select the (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: Sonar Multiplexor Question
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(...) Ive never done this before, but couldnt you do this? Buy a multiplexer that will take 2 outputs and multiplex it to 4 outputs, since you will only be driving one at a time. To each individual output of the multiplex, wire the power to one (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Sonar Multiplexor Question
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To anyone on the list: I would like to drive 3-4 transducers from a single Polaroid sonar ranging unit. Adam Cox posted a circuit for doing this on the HandyBoard page -- I have a few questions regarding this and possible alternative solutions. Has (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: V2X Compass
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I have a question for you, how much does the compass deviate when the motors turn on. As an ex-sailor, one of the major consideration in using magnetic compasses is deviation, and on a small bot, the deviation would vary due to the changing (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | IR sensor
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I am having troubles getting my ir sensor to work I did everything that is said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: downloaded
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Hi German, I'm not sure why this message got re-forwarded to the handyboard mailing list. I was cc'd on the key that our order department e-mailed to you last week; if you still have not received it please let me know. We appreciate everyone's (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Polaroid sonar module connector
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Does anyone know where I can buy a couple of the sockets that are designed to accomodate the flat cable from the Polaroid sonar modules? Thanks. --Will , , __@_/ \_@__ |/ | /__, o @_/ )\ ) ( \ (\/\\, ~~~...~~~ ' ` ~~~...~~~ ` ~~~...~~~ Wendy Parson, (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: ir sensor
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(...) said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and retrieve the data but I still get 255 when I press a different button (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: ir sensor
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(...) Make sure you don't have any bright light shining down on your board. Too much light saturates the sensor and you get 0 or 255 all the time. I thought my IR port was bust for a long time until I turned off my desk lamp one day. I hope your (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | ir sensor
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I am having troubles getting my ir sensor to work I did everything that is said in the technical reference and when I try to retrieve the data all I get is 255 the first time and 0 all the other times. I tried to deactivate it then activate it and (...) (27 years ago, 2-Mar-98, to lugnet.robotics.handyboard)
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| | Re: SPI?
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Thanks for all the info guys :) Clancy (27 years ago, 1-Mar-98, to lugnet.robotics.handyboard)
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| | SPI?
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What is the SPI part of the handyboard an what dos SPI stand for. pardon my ignorance (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | Re: V2X Compass
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John, My v2x has these numbers on the cpu 6448 PN11096 V2XC JJJ I have a handyboard , a v2x compass and small robot platform with left and right steering motors. Everything works, I can run the motors,load compass.icb and compass.c and the lcd will (...) (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | RE: downloaded
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(...) President (URL) (27 years ago, 28-Feb-98, to lugnet.robotics.handyboard)
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| | RE: V2X Compass
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I didn't actually buy the clock, the company that I work for was scrapping a load of stuff from one of it's buildings and these clocks were some of it. The company said if we gave 2 pounds to charity we could have a clock. They have been very (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Help for problems with Polaroid 6500 sonar board
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Hi all if anyone has problems using the 6500 series for distances below 35cm by using the binh signal I have a possible solution to the problem. We also expierienced problems using the sensors for distances between 15cm and 40cm. We finally found (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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(...) Yes! I have been working from your sonar page, but as a sanity check I checked the Polaroid sheet again. Whoops! At least we were both tripped up by it. I'm used to seeing the "speed of sound" (ft/ms) quoted, not the "slowness of sound" (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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Good questions!! (...) The polaroid number/widely quoted number is 0.9 MILLISECONDS PER FOOT -- or 1.11 ft/ms. hence the conversion matches! I think also I have this wrong on my HB sonar page! This confused me for a while too. (...) Yes, this is (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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... still a good book though- I recommend it highly :) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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