Share My Creation Carbon monoxide alarm

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My project is related to carbon monoxide warning system.
The tools I used in this project are: Arduino Nano TM 1637 board, 5V buzzer, bread board, male to male jumper wire, green and red LEDs.
The way this system works is that if the level of carbon monoxide rises above a certain level, the red LED will light up and the buzzer will sound, and if it is lower than the set limit, the green LED will light up and the red light and buzzer will turn off.
 

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