 | | Re: handy board troubles... —Jake Burkholder
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| | | (...) Yes, that was indeed the problem. Upon removing all the ICs, the power to U14 disappeared. What could cause this, a blown fuse at F1? (25 years ago, 22-Mar-00, to lugnet.robotics.handyboard)
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| | | | | Re: handy board troubles... —Fred G. Martin
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| | | | that's possible, it's easy enough to test (just check continuity across F1). more likely that U14 croaked. is there batt pwr on its input side. f. In your message you said: (...) (25 years ago, 22-Mar-00, to lugnet.robotics.handyboard)
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| | | | | | Re: handy board troubles... —Jake Burkholder
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| | | | | (...) I traced the lack of power to a dead wire between C5 and pin 28 of U14; soldering a small piece of wire between these connections fixed it. Thanks, everything works perfectly now! (25 years ago, 22-Mar-00, to lugnet.robotics.handyboard)
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| | | | | | | Re: handy board troubles... —Fred G. Martin
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| | | | | | great, that's excellent! the key trick was pulling all the socketed chips. it's a weird but true fact that chips that don't have valid logic supplies can draw power in from their inputs pins (when the inputs are high) and operate off of that leeched (...) (25 years ago, 22-Mar-00, to lugnet.robotics.handyboard)
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| | | | | | Re: handy board troubles... —Gary Livick
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| | | | This isn't technically a Handy Board problem as my code is being run on a Rug Warrior look-alike. However, I suspect that the same problem I'm experiencing would happen on my Handy Board if eviscerated one of my other robots and tried it. (...) (25 years ago, 15-Apr-00, to lugnet.robotics.handyboard)
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| | | | | | Re: handy board troubles... —Fred G. Martin
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| | | | gary -- it's an interesting bug. as you say you've got two 2-dim arrays, i can surmise that you're using Newton Lab's version of IC. In which case, they'd be the ones to address this problem. re: mailing list, it's now administered through LUGNET. (...) (25 years ago, 16-Apr-00, to lugnet.robotics.handyboard)
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