There are a couple ways to use I2C to connect an LCD to the Raspberry Pi. Learn how to do just about everything at eHow.
Arduino Lcd Display Charlesreid1
The PCF8574 converts the I2C signal sent from the Pi into a parallel signal that can be used by the LCD.
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. Find expert advice along with How To videos and articles including instructions on how to make cook grow or do almost anything. The simplest is to get an LCD with an I2C backpackBut the hardcore DIY way is to use a standard HD44780 LCD and connect it to the Pi via a chip called the PCF8574.
Arduino Lcd Display Charlesreid1
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Arduino Lcd Display Charlesreid1
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