Vibrating cane to help blind people
A team of scientists in Delhi has developed a smart cane for blind people, which uses sensors to give vibration feedback.
Around 12m people are living with blindness in India, the largest number for any country in the world.
Priced at under $50 (£30), the hope is that the smart cane can help people in developing countries.
The BBC's Shilpa Kannan met Bharti Kalra, a teacher who has been using the cane, and Professor Balakrishnan of the Indian Institute of Technology in Delhi, who is one of the developers.
- From the section Technology