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Commercially available LCD display modules like 16x2 LCD display and 20x4 LCD display are great to be used with a microcontroller like Arduino, Raspberry Pi, PIC, etc. to display the data but a standard 16x2 LCD even when operating at 4-bit mode takes about 8 GPIO pins from the microcontroller to display information on it and in the projects where GPIO pins are at a premium, it is a lot. That is why we need a serial to parallel data adapter so that we can reduce the number of pins needed to drive the LCD display modules. This LCD I2C adapter module is designed to fit directly below the standard 16x2 LCD display. Then through this module, the LCD can communicate through I2C protocol which requires only 2 pins from the controller side and then uses the PCF8574 IC to receive data from I2C and display them on the LCD screen. It can be used to drive Robotics projects, 3D printer, Quadcopters, etc.
As this Module is designed to fit the breakout pins of the commercially available 16*2 or 20*4 LCD displays, you just need to connect it to the display module and then power the I2C module from the controller you are using with VCC and GND pins. Connect SDA and SCL lines to the respective I2C pins of the controller to send the data.
1×I2C Serial Interface Adapter
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