 | | Re: NiMH batteries?
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(...) NiMh batteries do not have a memory but they do discharge faster when sitting unplugged. In my Thinkpad 750 (for which I have one NiCd and two NiMh batteries) the NiCd looses < 5% of its charge overnight and the NiMh batteries loose around 15% (...) (27 years ago, 16-Jun-97, to lugnet.robotics.handyboard)
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| | Walker Invasion #2
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More and more people are building walker robots each week. These web sites can help you become one of them soon. Steven Bolt just posted a note about his "Spider" robot on the BEAM list. His web site shows the eight-leg robot and includes (...) (27 years ago, 16-Jun-97, to lugnet.robotics.handyboard)
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| | Re: NiMH batteries?
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(...) Well, that is one of the great benefits of NiMH batteries is that they can be charged without ever having to completely cycle them. They are really convienient in Cel phones since you can use a trickle or 'zap' type charge on them no matter (...) (27 years ago, 16-Jun-97, to lugnet.robotics.handyboard)
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| | Re: NiMH batteries?
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(...) When I bought a mobile phone (or cellular if you like), the sales guy said that the NiMH didn't suffer from the memory effect like NiCad batteries do. But that was from a sales person - not necessarily reliabe info! cheers chris (27 years ago, 16-Jun-97, to lugnet.robotics.handyboard)
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| | Electrostatic cooling of robots
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The Yuma proving grounds, in Arizona, has proven to be a hostile environment for robots. In his UXO detection paper, Mark W. Tilden, researcher at Los Alamos National Laboratory, describes the area: The Yuma terrain is excessively hot during the day (...) (27 years ago, 15-Jun-97, to lugnet.robotics.handyboard)
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| | Re: stacked L293's
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It sounds like you have some kind of short in your L293B/D circuit. Do you have any single chips you can try separately? This method of stacking chips does often work, but you might have blown one, and then the two of them are fighting each other. (...) (27 years ago, 14-Jun-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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(...) Hi, You can tap the +5Volt pin from any of the digital/analog headers to power your motor drivers. (...) (27 years ago, 14-Jun-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Ihave solder two l293 (one D y one B) togethers .If i push that in the board , the battery go off in 60 seconds!!!! If i probe the motos (testmotors()) work fine ,but leds for the motor ligth without this outputs are actives!!! Wath is happens??? I (...) (27 years ago, 14-Jun-97, to lugnet.robotics.handyboard)
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| | RE: NiMH batteries?
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i'm sure they do, but the memory effect can be fixed and can be used to your advantage in some cases... you may want to talk to people all a local hobby store... esp. if they have a track.... i never learned the memory stuff, being into gas trucks, (...) (27 years ago, 14-Jun-97, to lugnet.robotics.handyboard)
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| | Need a Credit Card...
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If you have challanged(bad)credit and want to rebuild it, a good start is with a credit card. How DO I GET ONE you might ask? Follow the link below: (URL) (27 years ago, 14-Jun-97, to lugnet.robotics.handyboard)
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