Professional Dev Board
Jason-WI
Posts: 35
One thing that would have been great is an A/D convertor on board. Overall looks good and I may buy one or two.
One question I have is about the LCD contrast POT. Is it just connected to +5 and ground? The reason I ask this is some of the parallel LCD's I have require a negative LCD contrast bias. I have in the past borrowed negative voltage from the built-in switch capacitor convertor that are on the MAX232. This has worked without any adverse affects to the RS232 as the LCD bias is usually in the uA range.
Jason
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He who dies with the most toys wins!
One question I have is about the LCD contrast POT. Is it just connected to +5 and ground? The reason I ask this is some of the parallel LCD's I have require a negative LCD contrast bias. I have in the past borrowed negative voltage from the built-in switch capacitor convertor that are on the MAX232. This has worked without any adverse affects to the RS232 as the LCD bias is usually in the uA range.
Jason
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He who dies with the most toys wins!
Comments
Yes, the LCD contrast pin is positive only, so you may not get good results with displays that require negative bias.
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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA
Ryan