Subject:
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HELP GUYS! I'm stuck at the beginning of building my HANDYBOard!~
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 20 Oct 2001 17:50:04 GMT
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Viewed:
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1921 times
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Hey guys. I've just finished building the Interface/Charger Serial
Circuit. In testing, when I shorted pin 6 of the MAX232 to
J9-pin7(ground), i get the correct -10V. When I short pin 2 of the
MAX232 to ground, I get the correct +10V. When I short J9=pin2 to
MAX232-pin6, the green LED correctly lights up. When I measure from
J9-pin7 to J9-PIN3 (The MAX232's serial output), i get the correct -10V.
HOWEVER, when i jumper the -10 volt supply (MAX232-pin6) to MAX232-pin10
and measure the same J9-pin7 to J9-pin3 I get this mind boggling
3.70volts, instead of +10V!
I have done some testing, with the circuit running normally, the
voltages through MAX232-pin6 and MAX232-pin10 is the correct 10 volts.
When I put MAX232-pin6 to ground, i get the correct -10V. HOWEVER, when
I put MAX232-pin10 to ground, I get again, the mind boggling 3.7 Volts!
Guys, last time i did math, that's wrong! AHHHHHH! Please help me!
Thanks!
If you want e-mail me personally, PLEASE e-mail me at
michael.wong@sympatico.ca THANKS! Can't wait to get my handyboard up
and running!
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