tecno4

La pantalla tiene una retroiluminación de LED y puede mostrar dos filas con hasta 16 caracteres en cada fila. Puede ver los rectángulos para cada carácter en la pantalla y los píxeles que componen cada carácter. La pantalla es está diseñada para mostrar texto.

En este kit es necesario soldar el módulo adaptador I2C a display LED

As we all know, though LCD and some other displays greatly enrich the man-machine interaction, they share a common weakness. When they are connected to a controller, multiple IOs will be occupied of the controller which has no so many outer ports. Also it restricts other functions of the controller. Therefore, LCD1602 with an I2C bus is developed to solve the problem.

I2C bus is a type of serial bus invented by PHLIPS. It is a high performance serial bus which has bus ruling and high or low speed device synchronization function required by multiple-host system. The blue potentiometer on the I2C LCD1602 (see the figure below) is used to adjust the backlight  for better display. I²C uses only two bidirectional open-drain lines, Serial Data Line (SDA) and Serial Clock Line (SCL), pulled up with resistors. Typical voltages used are +5 V or +3.3 V although systems with other voltages are permitted.