Microcontroller based smart walking stick for visually impaired people

In this paper, the proposed system presents the Smart Walking Stick based on Sensors and PIC16F877A Micro Controller for visually challenged People. This system provides a solution who need help from others to do their regular activities. This system is designed using PIC16F877A microcontroller, ultrasonic sensors, DHT11 Temperature Humidity Sensor, LM35 Temperature Sensor, APR9600 Module, Buzzer and Earphone. This system will signal and alert the visually impaired person over any obstacles, water and fire through beep sounds and through voice commands in the earphone. This system finally alerts the user to take necessary actions. By Using Embedded C language, the system was designed and programmed. This system is used and checked by the visually impaired person. Blind person can gather information about the direction of the obstacles. It is possible by hearing the sound generated by the earphone and the buzzer. The aim of this system is to provide Low cost and Light weight Smart Walking Stick.