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 | | 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)
| | | | | 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)
| | | | | 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)
| | | | | 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)
| | | | | 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)
| | | | | 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)
| | | | | "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)
| | | | | 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)
| | | | | 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)
| | | | | 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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