Design and implementation of microcontroller based assistive robot for person with blind autism and visual impairment

Blindness is a more severe problem among the disabilities of Human. It is difficult to lead a normal life for blind like a sighted person. Because they cannot feel their surroundings. So, most of the blind peoples require travel aids to travel freely in an unknown environment. Researchers were invented several devices to make independent navigation for blinds. But most of them are invented for a specific task or the devices do not cost friendly. To gain independent navigation, a device with more features is required. For this purpose, “Design and Implementation of a Blind Assistive Robot” is designed to fulfill the goal. The device eliminates the requirement of human assistance for blind while traveling outside. It is made of reliable parts and has a relatively low cost compared to industrial bots. Every part of the device are simulated and tested. The device can run by any operator and requires low power. Arduino Mega (ATMega2560) used as the processor, ultrasonic sensors used to detect obstacles, stair, and hole, IR sensors used to sense line. Two dc motors are connected through a full bridge motor driver L98 module to navigate. A buzzer and a vibration motor used to give notification to the user. The device will follow a predefined line and will follow the wall, will detect an obstacle, hole and stair and gives sound notification to the user. The device will act as an assistant to the blind peoples.