Arduino Uno Project
Requirements:
• Arduino UNO
• Breadboard
• MQ-2 Sensor
• Buzzer
• Resistor 220 ohm
• Green and Red LED lights (5mm)
• Jumper Wires M-M and M-F
• Printer Cable
• Arduino IDE for upload Code
, https://i.ytimg.com/vi/13pLU3vwuYk/hqdefault.jpg
source