LCD's generally need 11signal lines + 3 or 5 lines for Vcc, ground and contrast and in some cases an extra 2 for background light.Using the LCD in 4 bit mode saves 4 pins, but often that is not enough. Although it is possible to use an I2C module to control the LCD with two wires via the I2C port, t...By: diy_bloke
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from Instructables: exploring - technology - robots http://ift.tt/1GXkDE4
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