Arduino + HR-SR04 Ultrasonic

I wanted to try an Ultrasonic sensor so I bought the cheapest one I could find, the HR-SR04. I used this tutorial to learn about the ultrasonic. Basically I thought the Ultrasonic would provide an analog signal with the distance…well I was wrong. Distance is calculated based on the time taken for an echo signal to be sent and received.

Here’s a picture of my setup.

IMG_20151121_160922

Materials used:

Wiring is easy:

  1. Uno’s 5V (via LCD Shield) to sensor’s 5V
  2. Uno’s GND (via LCD Shield) to sensor’s GND
  3. Uno’s Digital Pin 0 (via LCD Shield) to sensor’s ECHO
  4. Uno’s Digital Pin 1 (via LCD Shield) to sensor’s TRIG

You can find the code here. And voila! 🙂

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