I2C Backpack for HD44780-compatible LCD modules - 5 Pack
Now available from PMD Way are these I2C Backpacks for HD44780-compatible LCD modules in packs of five.
Click here for packs of fifty!
These convenient devices are used to give HD44780-compatible interface LCD modules a serial interface via the I2C bus. This allows you to control the LCD with only two data wires from your microcontroller (and power of course).
We may send one of two versions of this device - the difference is the controller IC. If you have the PCF8574T. the default I2C bus address is 0x27. If you have the PCF8574AT the default I2C bus address is 0x3F.
A jumper on the back controls power to the backlight, and a contrast potentiometer is also fitted.
- An Arduino tutorial
- Alternate Arduino library which allows for custom LCD characters (Thanks Geoff!)
- Raspberry Pi tutorial with the same I/O expander.
- PCF8574 datasheet (.pdf)