Becoming visually impaired can be a life changing experience. Jayraj Teeluckdharee is visually impaired. The latter works as telephone operator and it shows that we should always be courageous in life. Jayraj Teeluckdharee shares with us his ongoing life experience and argues on some of the points that should be implemented for people with disability. He adds that sonar assistive device at bus stop would be helpful for visually impaired person.

Sonar assistive device was developed to facilitate the visually impaired people to walk inside or outside their homes. The device uses a sonar technology where each ultrasonic sensor consists of a transmitter and a receiver. The transmitter will transmit a signal to an obstacle in front of it and when the signal reaches an obstacle, the signal is reflected back. The reflected signal is then received by the receiver. The system of Arduino Pro Mini will then evaluate the echo to identify the presence of the obstacles. This ultrasonic sensor can detect obstacles as far as 4 meters.