What are the best sensors to be used in smart stick (cane) for

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What are the best sensors to be used in smart stick (cane) for blind people to avoid obstacle such as walls and holes? - Quora

Do blind people use smartphones? - Quora

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What are the sensors used for an obstacle avoidance robot? Which one is the best? - Quora

Do blind people use smartphones? - Quora

Are smart canes for blind people a product that falls under the unsought or specialty category? - Quora

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