 | | Re: 600 mA Limit
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(...) You mean running FOUR motors uni-directionally from ONE L293D chip, right? ...and TWO motors bi-directionally from ONE L293D chip? (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | Miniboard/Handyboard.
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The Miniboard manual says that it can vary the motor speed at 16 levels at either direction. It was mentioned earlier that the Handyboard can vary only 8. Is this correct? I'm seeing that the Miniboard motor drivers has a higher resolution than the (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | Re: 600 mA Limit
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I just realized that getting 1200 milliamps running two motors bi-directionally is equivalent to running four motors uni-directionally at 2400 from a total power dissipation standpoint. I.e., there are still 600 milliamps running through each (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | Re: 600 mA Limit
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The 600 milliamp limit is per channel, but for a given motor, two channels are wired in series. So you don't get 1200 milliamps per motor but only 600. This would still yield 1200 milliamps per chip, since there are drivers for two motors. Also, if (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | 600 mA Limit
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I was wondering if the 600 mA limit on the motor driver chip is a limit for the total source current of all four motor outputs or for each individual motor output. If its 600 mA for each motor output,...will the chip get hot when running with 4 (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | Re: 1050mA Dc Motor
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If you use the Texas Instruments replacement for the L293D chip, you should be in business. Also, mini board questions should go to the robot board mailing list (see enclosed). -Fred -- This message was composed using Articulate Systems' (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | 1050mA Dc Motor
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Hi everybody I want to know if I can drive a DC motor which need 1050 mA as a starting current, using the miniboard. Thanx. Hachemi. (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | How to free up OC2?
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I believe I can disconnect the OC2 pin from the unneeded IR-Xmit function, so I can divert it for my own use. Would that require any trace cutting, or perhaps removal of the LED Xmitter? Or, better yet, is it all a software change? Fred, I know (...) (29 years ago, 28-Mar-96, to lugnet.robotics.handyboard)
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| | Re: pneumatic arms
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(...) Try this site: (URL) may contain some info you need...perhaps? (29 years ago, 27-Mar-96, to lugnet.robotics.handyboard)
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| | Help!
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Hi everyone, I had posted a question or two and some of you had answered me with some helpful info. Unfortunately, I accidentally erased all my messages before I gat a chance to read and save them. So,...if any of you still have any message that was (...) (29 years ago, 27-Mar-96, to lugnet.robotics.handyboard)
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| | Re: icb fixed in IC 3.1
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(...) Guess it comes from trying to earn a living selling software :) At any rate, I had seen the workaround for free IC posted several times in the past week, so I thought I would add rather than repeat information. Sorry for the self-serving (...) (29 years ago, 27-Mar-96, to lugnet.robotics.handyboard)
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| | problems with ICB files
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oh come on, Randy, you're acting too much like a big software company! "Don't worry that that feature is broken, it will be fixed in our new version!"Most of the time, people would rather hear a workaround than be told to upgrade! Regarding the (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | .icb files
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(...) I'd recommend moving up to IC 3.1. The current Windows and UNIX beta versions of IC 3.1 should accept .s19 files with any newline convention (CR, LF, CR-LF). (We're fixing that in the Mac IC beta soon). If you do get "illegal line in .s19" in (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Sony IR decoding routine!
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I downloaded the source code sony-ir.asm and assembled with asii_ic.bat and the resulting .icb file worked fine. I jumped the gun asking for help. Thanks any way. Ram. I'm having trouble getting sony-ir.icb to load. Every time I try, I get the (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Sony IR decoding routine!
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I'm having trouble getting sony-ir.icb to load. Every time I try, I get the following error message: FATAL INTERNAL ERROR: ILLEGAL LINE IN .s19 FILE I've re-downloaded and installed both the sony-ir.icb and pcode_hb.s19 files but continure to get (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | pneumatic arms
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Since electric motors running off small, mobile power supplies tend to be weak and slow, I was considering designing a pneumatic arm powered by an onboard container of compressed air. Can anyone tell me where I can obtain pneumatic solenoids (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | Get Alias Info
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Get Alias Info (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | process control question
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Hi all, I used the routines in Mobile Robot as a guide in building routines for my robot. I have an IR detector setup like the one described using the Sharp detector to detect left and right obstacles. I have a round robot with three bumper switches (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | How to run 8 servos by adding one HC chip
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(...) Warning: I haven't tried the following idea. Single chip add-on to control 8 servos using one timer line and a few digital outputs: The 74HC238 is a 3 to 8 demultiplexor. (see (URL) for datasheets). Unlike the more common HC138, its outputs (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
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| | Re: Get Alias Info
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In your message you said: (...) Arghh! The "get alias info" command is on the web pages, i.e., (URL) everyone, remember there is nothing automated about the handy board mailing list. to get on it, I must manually put you there. to get you off it, i (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
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