If you want to save permanent data to the Arduino taht won't be erased when you reset the microcontroller, well you have to store the data to the EEPROM, See how to do that. 

• EEPROM
• Arduino
• ROM
• Data

A rotary encoder is a type of position sensor that converts the angular position (rotation) of a knob into an output signal that is used to determine what direction the knob is being rotated. Due to their robustness and fine digital control; they are used in many applications including robotic... view more

• encoder
• Arduino
• CLK
• Data
• menu
• LCD