 | | Re: Burning hot motor driver chips.
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Anthony, As you've no doubt heard, RC motors take much more current than the Handyboard can supply. To control RC motors your only choice is to create a separate H-bridge to drive the motors. You can do this fairly inexpensively with power (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR devices
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Hi Jeremy! I used the shaft encoder out of a track ball for my robotic project(same thing but a bit bigger). You do not need the IC out of the mouse just take the shaft encoder and use it with a IR led and detector pair. If you are going to use the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Hello, RC car motors pull a lot of current, from 2A to 8A. The L293D chip goes up to 1A peak (for some miliseconds) before it shuts down. I suggest bypassing the L293D chips and using something like the LMD18200. (URL) Good luck, Marco A.A. de (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Project Questions
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Three of us are undertaking a project using the Handyboard as the control system for a class at MIT. Our project, an autonomous blimp, has an unusual set of constraints, but we're hoping that your collective experience might be able to help us (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) sounds reasonable.. which "car" BTW? Some may be using that very same platform and may have some timely advice for you. (...) sounds like overload/overheating cutoff to me. (...) This is from the Handy Board FAQ : <---snip---> It is possible (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Anthony, (...) Yes it sounds like it. (...) It does. The L293D still works after it cools off, doesn't it? (...) I suspect you are going to need more than just two piggy backed L293D. (...) You might have a look at Ben Wirz website, he sells various (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Burning hot motor driver chips.
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After not doing anything with my HB for a few months, I decided to buy a cheap RC car and use it as a platform. Anyway, I get a car that takes 6 AA batteries because I figure that the main motor is probably 9v (maybe that was a faulty assumption). (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Shaft Encoders
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(...) We used the line of "S1" optical encoders from US Digital Corp. ((URL) and found them to work superbly. The encoders are light (~.07 lb) and small (~1.7" x 1.3"). The company is a "Value Added Retailer" and adds housings/bearings/whathaveyou (...) (27 years ago, 8-Nov-97, to lugnet.robotics.handyboard)
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| | IR devices
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I recently opened up a mouse (the computer kind, not the live kind) and found what I assume to be 2 IR shaft encoders which it uses to translate the direction you are moving the mouse. Is there a way that I could remove them and turn them into shaft (...) (27 years ago, 7-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Help in Assembler
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What is "ORG"? Does it matter what number you use? Is the number a memory location? Thanks for any help! :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical (...) (27 years ago, 7-Nov-97, to lugnet.robotics.handyboard)
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