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obstacle detection circuit

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HI friends,

I want to design a circuit for obstacle detection with 5 meter range. which sensor should i use? explain me with details and circuit diagram...
 

Shape, dimension and other properties are of great importance for choosing sensors, such as IR, ultrasound, image sensors,....


I think that there is on edaboard at least several threads about this topic, you can search to see if there is some solution for your needs.
 
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hi, i want to make obstacle detection circuit for visually impaired persons. So we can't decide the size of obstacle.
 

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