Microcontroller based devices are widely used in different kind of sensing applications. Even though the microcontrollers are purely digital devices which work on logic0 and logic1 voltages they can read analog voltages as well. Most of the microcontrollers have built-in Analog to Digital Converter (ADC) modules which helps them in reading analog voltage inputs.The microcontroller based devices have several means by which it can communicate the sensed value with the user. It can use LED arrays, it can vary the intensity of a sound, and it can even communicate with a PC using serial communication protocol. But the most effective and commonly used method is to use dynamic display on an LCD connected with in the system.The LCD module is the most common output unit in a microcontroller board. It is very effective since it can display messages, values, clock etc. Special kinds of LCD drivers are used to drive the LCD.