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Make an ultrasonic ‘ping’ sensor from scratch

One can purchase ready-to-go ultrasonic sensors for $30 such as those from Parallax or Devantech but for max-cheapiness you may want to roll your own as this fellow from Micro Examples has done. You can make a basic one by having your already-on-board microcontroller do the timing.

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1 Comment

  1. hi
    how to create filter for ultrasonic?
    thanks.

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