Hardware

Arduino/Genuino Uno

Software

Eye-Fit: a simple prototype of light and reading distance keeper, built with Arduino Uno, ultrasonic HC-SR04, mini solar cell 0.5v, some LEDs, buzzer and OLED 0.96" display. It helps you to keep the ideal distance and light exposure while reading or watching monitor. If your reading distance less than 20 cm, its buzzer will be turned on. Also, when you read a book at a dark room, its LEDs will be turned on automatically.