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
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| Module |
Number |
Function
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| Micro-USB cable |
1 |
Program download, and power supply
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| Wooden casing suite |
1 |
The appearance, and fixation
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| M2 screw |
15 |
Structure fixation
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| M2 nut |
15 |
Structure fixation
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| Screwdriver |
1 |
Tool
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| double-sided taps |
2 |
Structure fixation
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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
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.
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- Step2
- Fix OLED on structure B2 with screw and nut, as shown in the picture.
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- 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.
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- 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.
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- Put structure B3 adjoining to structure B2.
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- Put structure B4 adjoining to structure B3.
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- Step5
- Cover structure A1 and structure A2 up and down and fix with cart slot of structure B5 . Now the noise monitor assembling complete.
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- Finally, insert USB cable into the power supply backplane of Microduino-Duo-v , then the noise tester can operate.
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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.
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