Difference between revisions of "Open Source Voice Decibel Detector"

Outline

• Project：Microduino open source voice decibel detector
• Objective：Monitor noise, and it will give an alarm when the threshold is surpassed.
• Difficulty：Medium
• Time-consuming：1 hour
• Maker：ray

• Introduction:
  • In this tutorial we will use Microduino product module to quickly set up a noise detector.
  • It can detect the constant noise and give an alarm with buzzer and LED lights.
  • The noise decibel value will be displayed on the OLED screen.

Bill of Material

Principle of the Experiment

• Collect voice in the environment through mCookie-Sensor MIC microphone sensor.
• When the voice is constantly over db threshold, the LED will light and the buzzer will alarm.
• You should press the collision to remove the alarm.
• OLED screen real time displays the current environment sound db value.

Program Download

• Db monitor github download:DBDetector

Programming

• Overlay Microduino-Core and Microduino-USBTTL together.
  • Connect Microduino-USBTTL with USB cable, and prepare to upload the program.
  • Note：Please upload programs before stacking all modules together.
• Open Arduino IDE for Microduino environment（Reference to set up：AVR Core：Getting started）
• Click [tool] bar, confirm board（Microduino-Core） processor（Atmega644pa@16M,5V） selected correctly, and select the corresponding port number(COMX).
• Click [File]->[open], browse to the project program address, and click “DBDetector.ino” to open it.
• After all these items are correct, click "→" button to download onto the development board.

Noise Detector Assemble

Step1 Set them respectively in turn from left to right, namely structure B1,B2,B3,B4.

Step2 Fix OLED on structure B2 with screw and nut, as shown in the picture.

Fix collision switch on structure B1 in accordance with the direction as shown in the picture. Note that it must be same with the direction on the picture, which is related to the overall placement of the collision switch.

Fix Microduino-Buzzer buzzer on structure B3.

Fix Microduino-Sound on structure B4.

Overlay the following modules on Microduino-Duo-v, as shown in the picture： Microduino-Sensor Hub Microduino-Core Microduino-USBTTL

Step3 Put structure B1 adjoining to structure B2. Make collision switch part in structure B1come out from the hollow-out part in structure B2, as shown in then picture marked.

Put structure B3 adjoining to structure B2.

Put structure B4 adjoining to structure B3.

Step4 Connect the microphone Mic to the A0/A1pin of Microduino-Sensor Hub. Connect the buzzer Microduino-Buzzer to D10/D11 pin. Connect collision switch Microduino-Crash to D8/D9 pin. Connect Microduino-Color LED to D6/D7 pin. Connect OLED screen Microduino-OLED to the IIC pin of SDA/SCL （choose either）in the lower right corne.r

Fix Microduino-Color LED and structure A1 together.

Step5 Cover structure A1 and structure A2 up and down and fix with cart slot of structure B5 . Now the noise monitor assembling complete.

Finally, insert USB cable into the power supply backplane of Microduino-Duo-v , then the noise tester can operate.

Operating Instruction

• When noise reaches a certain degree, it will give an alarm.
• The buzzer will ring, and the LED lamp will light.
• OLED will show the highest decibels.
• You can press the collision switch to turn off.

FAQ

• Q：Can the triggered sound size and duration be changed？
  • A：Yes, you can change the variable value of voice and maxNoise in userDef.h.

• Q：Can I close it when the alarm ring？
  • A：Yes, pressing the switch can close it.

• Q：Why dose mine continually alarm, and turning off the switch has no reaction？
  • A：Notice that if the pin of microphone MIC has been inserted into A0/A1, and not into D0/D1, where is confusing.