2.3 Operation Guide

It is quite easy to understand the theory of the distance detection. The ultrasonic transceiver sends out the burst waveform and, while waiting for the feedback waveform which is reflected from the obstacle above it, the microcontroller calculates the travel time and translates it into the distance.

Figure 2-2. The Detect Theory of the Ultrasonic Range Finder Board

To use the Ultrasonic Range Finder Board, the user needs only to power-up the board with a micro-USB cable.

Figure 2-3. Power the Board

While powered, the OLED display will show the measured distance above the board. Changing the altitude of the obstacle also changes the displayed value.

The user must select the most suitable level to get the most precise result. The optional levels are show below:

  • 40cm ~ 100cm(beta)
  • 70cm ~ 250cm
  • 100cm ~ 600cm
  • 250cm ~ 1000cm

Press the MODE button to switch between these levels.