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But proximity sensor can only detect really short range, i need somehow 1.5-2 metre range.
Thanks for advice. I will change it.
Thanks for the reply, I intend to build a detecter for blind people which help them avoid obstacle above their abdomen. So there will be two arduino board, each with 2 ultrasonic sensor (provide wider range) and one vibration motor. So they will be 4 sensor.
can you help me to review this?
can you make a tutorial on how to use two ultrasonic sensor to control a vibration motor? What spec is your vibration motor.
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