{"id":96,"date":"2021-11-26T23:18:15","date_gmt":"2021-11-26T23:18:15","guid":{"rendered":"https:\/\/commons.mtholyoke.edu\/mumtazlearns\/?p=96"},"modified":"2021-12-07T00:40:53","modified_gmt":"2021-12-07T00:40:53","slug":"group-project-tranquility-detector","status":"publish","type":"post","link":"https:\/\/commons.mtholyoke.edu\/mumtazlearns\/2021\/11\/26\/group-project-tranquility-detector\/","title":{"rendered":"Group Project: Tranquility Detector"},"content":{"rendered":"\n

Project Aim<\/strong><\/h2>\n\n\n\n

Develop a noise detector that buzzes and lights up when the sound levels reach above a certain level acceptable in the tranquility room in the dining hall.<\/p>\n\n\n\n

Team Members<\/strong><\/h2>\n\n\n\n

Sulagna Saha, Yu Wati Nyi, Mumtaz Fatima<\/p>\n\n\n\n

Documentation of Our Build Process<\/strong><\/h2>\n\n\n\n
  1. Collect the required components from the Arduino Kit. The required components were: Arduino Uno kit, Breadboard, Buzzer, LED Light, Sound Sensor<\/li>
  2. Connect the Arduino Uno to the breadboard and make the necessary connections with the LED bulb, Buzzer, and Sound Sensor<\/li>
  3. Modify the code and add the functionality to activate buzzer whenever the sound sensor detects a value, it saves the value, finds the peak value, uses this value of the detected sound to convert it into volts.<\/li>
  4. Cardboard box: 
    • Cut cardboard to create a box with 2 open lateral ends. <\/li>
    • Make 3 holes to add the components. One hole on the top to attach the sound sensor and 2 holes on the side to attach the LED and the buzzer<\/li><\/ul><\/li>
    • Test the connections and view the serial monitor to check whether the code works as intended<\/li>
    • Finally attach the breadboard to the bottom of the cardboard box and cover the 2 open ends.<\/li><\/ol>\n\n\n\n

      Circuit Diagram <\/strong><\/h2>\n\n\n\n
      \"\"<\/figure>\n\n\n\n

      <\/p>\n\n\n\n

      Code<\/strong><\/h2>\n\n\n\n
      \/*\n MAX4466 (adafruit mic)\n \n Written by Shani Mensing, edited by Audrey St. John\nModified by Yu Wati Nyi, Mumtaz Fatima, Sulagna Saha\n \n Circuit: microphone VCC connected to 3.3V, OUT to analog input A0\n *\/\n\n\/\/ hook up the out of the mic to analog input A0\nint MIC_IN = A0;\n\n\/\/ Sample window width in milliseconds (50 ms = 20Hz)\nint sampleWindow = 50; \nint red_light_pin= 11;\nint green_light_pin = 10;\nint blue_light_pin = 9;\nInt buzzer_pin = 8;\n\n\/**\n * Initialization code\n **\/\nvoid setup()\n{\n   \/\/ open serial port and set data rates to 9600 bps (bits-per-second)\n   \/\/ this lets us communicate to\/from the arduino\n   Serial.begin(9600);\n   \n   pinMode( MIC_IN, INPUT );\n   pinMode(red_light_pin, OUTPUT);\n   pinMode(green_light_pin, OUTPUT);\n   pinMode(blue_light_pin, OUTPUT);\n   pinMode(buzzer_pin, OUTPUT);\n}\n\n\/**\n * Main program loop happens constantly.\n **\/\nvoid loop()\n{\n    \/\/ read the analog sensor as volts\n    double soundSensed = sampleSoundPeak();\n    \n    \/\/ convert to volts\n    double volts = (soundSensed * 3) \/ 1024; \n    if(volts<1){\n      RGB_color(0, 255, 0); \/\/ Green\n      delay(1000);\n    }\n    else{\n      RGB_color(255, 0, 255); \/\/ Magenta\n      delay(1000);\n      tone(buzzer_pin, 1000); \/\/ Send 1KHz sound signal...\n      delay(1000);        \/\/ ...for 1 sec\n      noTone(buzzer_pin);     \/\/ Stop sound...\n      delay(1000);\n    }\n    \n    \/\/ print it out\n    Serial.println(volts);\n}\n\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ Our own methods\n\n\/**\n * Sense biggest input difference are being input from the analog MIC sensor\n * over a certain \"window\" of time. \n * Values returned are in the range 0 - 1024.\n **\/\ndouble sampleSoundPeak()\n{\n    \/\/ record start time \n    double startMillis = millis(); \n\n    \/\/ this will be the highest peak, so start it very small    \n    int signalMax = 0;\n    \n    \/\/ this will be the lowest peak, so start it very high\n    int signalMin = 1024;\n    \n    \/\/ will hold the current value from the microphone\n    int sample;\n    \n    \/\/ collect data for 50 ms\n    while ( (millis() - startMillis) < sampleWindow ) \n    {\n        \/\/ read a value from mic and record it into sample variable\n        sample = analogRead( MIC_IN );\n        \n        \/\/ toss out spurious readings\n        if (sample < 1024)\n        {\n        \n            \/\/ if the current sample is larger than the max\n             if (sample > signalMax)\n             {      \n                   \/\/ this is the new max -- save it\n                   signalMax = sample; \n             }\n             \/\/ otherwise, if the current sample is smaller than the min\n             else if (sample < signalMin)\n             {\n                   \/\/ this is the new min -- save it\n                   signalMin = sample; \n             }\n         }\n     }\n     \n     \/\/ now that we've collected our data,\n     \/\/ determine the peak-peak amplitude as max - min\n     int peakDifference = signalMax - signalMin; \n    \n     \/\/ give it back to the caller of this method\n     return peakDifference;\n}\nvoid RGB_color(int red_light_value, int green_light_value, int blue_light_value)\n{\n  analogWrite(red_light_pin, red_light_value);\n  analogWrite(green_light_pin, green_light_value);\n  analogWrite(blue_light_pin, blue_light_value);\n}<\/code><\/pre>\n\n\n\n
      <\/p>\n\n\n\n
      Project Display <\/strong><\/h2>\n\n\n\n
      \n