Noise Alarm

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Objective When noise reaches a certain value around you, the alarm goes off. Principle Equipment Module Number Function Microduino-CoreUSB 1 Core board Microduino-Sensorhub 1 Sensor pinboard Microduino-Mic 1 Sound detection sensor Microduino-Crash 1 Crash/touch switch Microduino-BUZZER 1 Buzzer sensor Microduino-BM 1 Battery management File:Noise alarm.jpg 600px Hardware Buildup Setup 1：Connect CoreUSB to your PC, open program example, choose the right board and download program via the serial port. File:Noise alarm setup 1.jpg 600px Setup2：Connect Mic to the A0 pin of Sensorhub, buzzer to D6 and crash sensor to D4. File:Noise alarm sensor.JPG 800px Setup6：Connect battery to BM. File:Noise alarm bm.JPG 800px Software Debugging Build IDE, connect CoreUSB to your PC and download program code. Noise_alarm Code description Control pin description #define mic_pin A0 #define buzzer_pin 6 #define key_pin 4 Sound pre-set value #define voice 400 If the sound value is greater than the preset value in one second, then the buzzer will give an alarm. if (voice_data > voice) { if (millis() - time > 1000 ) { voice_data = analogRead(mic_pin); if (voice_data > voice) { buzzer_speak = true; i = 200; } time = millis(); } } Touch the key to close the sound. if (key_get(key_pin, 0)) { delay(200); buzzer_speak = false; time = millis(); } Result If the sound around you exceeds the default value within one second, the alarm will go off. You can press the key and close the sound. (You can also build a beautiful cover with LEGO.) Video