Components Required:
- Arduino with USB Cable
- A PC or Laptop with Arduino software with drivers installed for programming the Arduino
- LM35 Temperature Sensor
- Piezo Buzzer
- Bread Board
- Connecting Wires
Circuit Diagram:
Code:
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| /* | |
| ============================================ | |
| The MIT License (MIT) | |
| Copyright (c) 2013 Jayakarthigeyan Prabakar | |
| Fire Alarm Using LM35 and Piezo Buzzer with Arduino sketch is the Arduino sketch used in the project shown at https://www.youtube.com/watch?v=XC3xZ-cWDaY | |
| Created on 19th February 2013 by Jayakarthigeyan Prabakar <jayakarthigeyan@gmail.com> | |
| Updates should (hopefully) always be available at https://github.com/jayakarthigeyan/Fire-Alarm-Using-LM35-Temperature-Sensor-and-Piezo-Buzzer-with-Arduino/ | |
| Permission is hereby granted, free of charge, to any person obtaining a copy | |
| of this software and associated documentation files (the "Software"), to deal | |
| in the Software without restriction, including without limitation the rights | |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| copies of the Software, and to permit persons to whom the Software is | |
| furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all | |
| copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| SOFTWARE. | |
| =============================================== | |
| */ | |
| void setup() | |
| { | |
| } | |
| void loop() | |
| { | |
| float temp = (5.0 * analogRead(A0) * 100.0) / 1024; | |
| if(temp>32) | |
| { | |
| t(); | |
| } | |
| else | |
| { | |
| if(temp>30) | |
| { | |
| t1(); | |
| } | |
| if(temp<30); | |
| { | |
| noTone(7); | |
| } | |
| } | |
| } | |
| void t() | |
| { | |
| tone(7, 494, 500); | |
| delay(1000); | |
| } | |
| void t1() | |
| { | |
| tone(7, 494, 500); | |
| delay(2000); | |
| } |
