 | | blown L293's
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Bill, I think the moral of the story is: DO NOt use 3v motors with the Handy Board. They draw too much current. Use motors rated at least 6v, even that can be a problem. I should put this in the manual somewhere... See (URL) to buy more L293's. (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR sensor question
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As illustrated in the hb manual, the QRD and QRB sensors do NOT use modulated IR light. the sensors as wired just turn on the IR emitter like a little light bulb, and the received sensor value is a combination of reflected IR light and general (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | Re: "Old" (pre-6500) Polaroid sonar boards?
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Well, that was too easy. Guess I should have read all the way through the FAQ earlier... *thud. I've now got the MISO output driving the VSW input on the sonar board, and am reading a digital input for the MFLOG signal. Works like a charm. I'd still (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Motor Problems
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Geeze - sounds like my kind of luck. Well, according to the Handy Board FAQ, there are two varieties of the 293; the 239B and the 293D - the "D" is rated at 600mA/channel and has spike suppression diodes built in, while the "B" is rated at (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | int's and long's
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Greetings all Anybody know if IC can support unsigned int's or long's. My situation is, I need to load a 32-bit signed number, ie a long, into the HB. BUT, I can only load it two bytes at a time, most significant byte first. I've tried different (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | Motor Problems
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I left a email about my motor problem earlier this evening. Well, since then I have changed my code to use ports 2 and 3 and the bot worked just fine for a little while, then both 293 chips smoked. I guess I was drawing too much current. Anyway I am (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | "Old" (pre-6500) Polaroid sonar boards?
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Has anyone done anything with the "old" Polaroid boards? (I've got some I pulled out of some auto-focus cameras I bought cheap many years ago.) I can hook them up and make them work by hand, and I've got one partially wired into a Handy Board, but I (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | IR sensor question
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I have a very basic doubt regarding the working of the QRD114 sensor. If we connect the sensor as per the illustration in the handy board document, how do we make the emitter transmit IR waves? what will be the frequency of the IR beams (40kHz)? (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | My motors quit!
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Howdy, Well I finally got my bot to going and was hooking up the bump sensors. I had one plugged in and was seeing how it functioned when all of the sudden there was dead silence. My motors quit running. I have them hooked to ports 0 and 1 of the (...) (28 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Downloading problems
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The memory circuit is probably flaky, or, you zapped a 6811 address line output. If you haven't already tried, swap the 6811 with a known good one. If that doesn't work, examine the ram chip addr, data bus, and select signals with a logic probe when (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Downloading problems
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After setting the CONFIG register, downloading the pcode never completes. We get anywhere from 0 to about 1600 bytes transferred, then an error. Everything has checked out to this point. Any hints? ***...*** * Greg Starr, Professor and Graduate (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Re: QRD1114?
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Digikey. call 1 800 DIGI KEY. add 'QT-ND' to the part number and you get the digikey catalog #. -fred In your message you said: (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | SPI
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Hi all- I remember reading something about an asynchronus serial routine at 1200baud using the SPI that was coming out in January. Does it exist? If so, how can I get it? Does anyone have anything that transmits RS-232 on the HB? I still want to be (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Polaroids
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Jim, Check out the following links, the work has already been done for you! ftp://cherupakha.med...trib/kent/ ftp://cherupakha.med...ent/readme - Prabal (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Polaroids
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My design team would like to incorporate two polaroid sensors with our handy board. We were wondering just how do we send the INIT pulse from the HB to the Polaroid sensors? The member in charge of writing the code for our robot quickly drafted up (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | QRD1114?
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In the documentation for connecting sensors and actuators to the HB a The Quality Technologies IR reflective optosensors (QRD1114 & QRB1114) were depicted in the example and recommended. Where can these sensors be aquired? Thanks JTW (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR sensors
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(...) Sure. We put "Front" on digital(14) and "Right" on digital(15). And you can have as many as you want that don't interfere with each other. We did something like... contact = digital(14) * 2 + digital(15) to get both sensor results into an (...) (28 years ago, 5-Feb-97, to lugnet.robotics.handyboard)
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| | Extra power supply?
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I can't seem to locate the 'how to add a second power supply for a servo' information. I know I read it once, but now that I want to go back and use it of course I can't find it. (duh) Can anyone point me in that direction? Also I could use any (...) (28 years ago, 4-Feb-97, to lugnet.robotics.handyboard)
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| | Handyboard debugging problem...
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One of the student groups in my Lego robot course is having a problem getting their Handyboard to work...they got IC to load successfully, then went ahead and installed U6 ('HC138), U9 ('HC04), U5 ('HC244), resistor packs RP1 and RP2, and SW2. Now (...) (28 years ago, 4-Feb-97, to lugnet.robotics.handyboard)
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| | Please subscribe me to mailing list
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Please subscribe me to the mailing list: menser@sbu.edu Matt Enser email : menser@sbu.edu WEB: (URL) (28 years ago, 4-Feb-97, to lugnet.robotics.handyboard)
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