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Old 26th February 2010, 04:47 AM   #1
funky2x is offline funky2x  Syria
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Default Key matrix circuit ... Help

I need some help to put this circuit into work ..
any idea of pcb design ....
am not good at this matrix
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Old 26th February 2010, 10:11 AM   #2
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Location: Carlisle, England
You need 4 off the isolating protection diodes in case two or more keys are pressed at once.
Also the lower diode should be in the same place as the upper two.
Murton-Pike Systems PCBCAD51 pcb design software.
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Old 26th February 2010, 11:38 AM   #3
funky2x is offline funky2x  Syria
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Join Date: Jan 2008
still nothing ... thank you
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