 | | dc motor output control???...???
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hi everyone, i need some help on controling the output voltage of the dc motor ports. the output voltage is 9.6V and i like to know if there is any way to clamp down the voltage to 5V or lesser. i try using a enternal resistor but the output signal (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | Re: LCD configs (was:Suppliers and rf link)
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john calhoun, Mine just arrived and they are 1 X 16 connectors. I ordered 2035TNLD/Y displays for $8.00 each. You might want to order now while they have the 2X16 displays with 1X16 connectors. I have soldered the connector on and tested it and its (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | Re: dc motor output control
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Maybe you can put a series of diodes in series and in parallel but the other direction to reduce the voltage. H-bridge +- +- +- +- motor H-bridge -+ -+ -+ -+ Good luck, James (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | RE: urgent request help !!!!
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What about the display board itself? Could it be that one of the SMT parts on the board is dead? Or a trace on the LCD is shorted? --phil (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | RE: urgent request help !!!!
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-----Original Message----- From: phillip chia [mailto:philchia@sin...et.com.sg] Sent: Friday, December 18, 1998 7:04 AM To: handybd Cc: Mr Peter Lim Subject: urgent request help !!!! Hi Fred and others, I very desperate to debug the problem that (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | dc motor output control
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hi everyone, i need some help on controling the output voltage of the dc motor ports. the output voltage is 9.6V and i like to know if there is any way to clamp down the voltage to 5V or lesser. i try using a enternal resistor but the output signal (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Downloader and a/d
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Cesar, (...) According to my book, you can set the reference voltages to anything from Vss to Vss + 6.0 V (notice that this is higher than Vdd). The A/D result is a ratioatic comparison for the sample voltage to the references. Page 48 of the (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Replacing L293D with L298H
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Hi Fred and others, I very desperate to debug the problem that took place in my HD. When I download the P_code, it is successfully downloaded. However, when the next instruction ask to reset the board, no words of sentence appear on the LCD. Only 16 (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Downloader and a/d
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Hi friends! First thank you a lot for the advices on the FingerBoard. It really gets near to what I need, but that ram chip is another headake. So I believe more in a "light" version of the Handyboard right now, later I'll make a specific version (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HD LCD problems
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(...) On a lark, I'll suggest that perhaps U6 is damaged. If you have another 74HC138 around, try swapping it for the one on your HB. I had a "similar" problem (although not identical) and was able to diagnose the 74HC138 as the problem. I too was (...) (26 years ago, 17-Dec-98, to lugnet.robotics.handyboard)
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