Quantity   Component name
1 × BOOK (18 BY 21 cm)
1 × ARDUINO NANO (ATmega328P) Arduino boards are widely used in robotics, embedded systems, automation and electronics projects. These boards were initially introduced for the students and non-technical users but nowadays Arduino boards are widely used in industrial projects.
1 × LIMIT SWITCH A limit switch is an electromechanical device operated by a physical force applied to it by an object. Limit switches are used to detect the presence or absence of an object. These switches were originally used to define the limit of travel of an object, and as a result, they were named Limit Switch.
1 × BATTERY (9V) The nine-volt battery, or 9-volt battery, is a common size of battery that was introduced for early transistor radios. It has a rectangular prism shape with rounded edges and a polarized snap connector at the top. This type is commonly used in smoke detectors, gas detectors, clocks, walkie-talkies, electric guitars and effects units.
1 × LCD I2C (4 X 20) Now, with only 3 pins from the microcontroller, you can display messages on this LCD. Compared to a parallel LCD which required at least 6 pins of I/O, this LCD offers a more cost effective solution. The LCD display is four lines by 20 characters and provides basic text wrapping so that your text looks right on the display.