General product
SPECIFICATION
5V power supply
Serial I2C control of LCD display using PCF8574
Backlight of the LCD display can be enabled or disabled via a jumper on the board
Contrast of the LCD screen control via a potentiometer
Can have 8 modules on a single I2C bus (change address via solder jumpers)
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.
