4. Sound Sensor(EF05003)#

4.1. Introduction#

Sound Sensor is particularly sensitive to sound intensity, and it can be used to detect ambient sound level.


4.3. Characteristic#

Designed in RJ11 connections, easy to plug.

4.4. Specification#

Item Parameter
SKU EF05003
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V
Size 55.8 x 23.8 mm

4.5. Outlook#


4.6. Quick to Start#

4.6.1. Materials Required and Diagram#

Connect the sound sensor to J1 port and the OLED module to IIC port in the Nezha expansion board as the picture shows.


4.7. MakeCode Programming#

4.7.1. Step 1#

Click “Advanced” in the MakeCode drawer to see more choices.


We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “PlanetX” in the dialogue box to download it.


Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

4.7.2. Step 2#

4.7.3. Code as below:#


4.7.5. Result#

The value of the sound(dB) in the current environment displays on the OLED module.

4.8. Python Programming#

4.8.1. Step 1#

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor


We need to add enum.py and noise.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and noise.py from the unzipped package of PlanetX_MicroPython.

../_images/05001_081.png ../_images/05001_091.png ../_images/05003_10.png

4.8.2. Step 2#

4.8.3. Reference#

from microbit import *
from enum import *
from noise import *

while True:
    noise = NOISE(J1)
    noise_value = int(noise.get_noise())

4.8.4. Result#

The value of the sound(dB) in the current environment displays on the micro:bit.

4.9. Relevant File#

4.10. Technique File#