{"product_id":"uno-gas-smoke-warning-project-combo-arduino-uno-r3-mq-2-sensor-buzzer-led","title":"UNO Gas \u0026 Smoke Warning Project Combo | Arduino UNO R3 + MQ-2 Sensor + Buzzer + LED","description":"\u003ch2\u003eUNO Gas \u0026amp; Smoke Warning Project Combo — Arduino UNO R3 + MQ-2 + Buzzer + Red LED\u003c\/h2\u003e\n\u003cp\u003eBuild a simple yet effective \u003cstrong\u003eGas \u0026amp; Smoke Warning System\u003c\/strong\u003e with this beginner-friendly project combo from \u003cstrong\u003eXsortex HUB\u003c\/strong\u003e. This kit pairs the iconic \u003cstrong\u003eArduino UNO R3\u003c\/strong\u003e with the \u003cstrong\u003eMQ-2 Gas \u0026amp; Smoke Sensor\u003c\/strong\u003e, an \u003cstrong\u003eActive Buzzer\u003c\/strong\u003e, and a \u003cstrong\u003eRed LED\u003c\/strong\u003e — giving you a compact alarm system that detects dangerous levels of LPG, methane, smoke, or hydrogen and immediately alerts you with sound and light.\u003c\/p\u003e\n\u003cp\u003eThis is one of the most popular beginner Arduino projects — simple to wire, easy to code, and genuinely useful. Perfect for first-time Arduino users, school students, and anyone building a home safety demonstration.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included in This Combo?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1× Arduino UNO R3\u003c\/strong\u003e — ATmega328P DIP, 5V, 14 digital I\/O, 6 PWM, 6 analog inputs, USB-B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1× MQ-2 Gas \u0026amp; Smoke Sensor Module\u003c\/strong\u003e — Detects LPG, methane, smoke, hydrogen \u0026amp; propane; analog + digital output; 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1× 3V Active Buzzer\u003c\/strong\u003e — Audible alarm on gas or smoke detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5× 5mm Red LED\u003c\/strong\u003e — Visual danger indicator when gas is detected\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5× 220Ω Resistor\u003c\/strong\u003e — Current-limiting resistor for the Red LED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eMQ-2 sensor\u003c\/strong\u003e reads the concentration of combustible gases in the surrounding air via its analog output pin. The Arduino UNO reads this value and compares it to a safe threshold. When gas or smoke is detected above the threshold:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🔴 \u003cstrong\u003eRed LED\u003c\/strong\u003e turns ON as a visual danger alert\u003c\/li\u003e\n\u003cli\u003e🔔 \u003cstrong\u003eBuzzer\u003c\/strong\u003e sounds a continuous alarm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen the air clears, the system resets automatically. The threshold is fully adjustable in the Arduino sketch.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrocontroller:\u003c\/strong\u003e Arduino UNO R3 (ATmega328P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Sensor:\u003c\/strong\u003e MQ-2 — LPG, methane, smoke, hydrogen, propane; analog + digital output; 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator:\u003c\/strong\u003e 5mm Red LED with 220Ω resistor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlert:\u003c\/strong\u003e 3V Active Buzzer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 5V via USB-B from Arduino UNO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming:\u003c\/strong\u003e Arduino IDE — no extra libraries required, beginner-friendly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUse Cases\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHome kitchen LPG gas leak warning alarm\u003c\/li\u003e\n\u003cli\u003eSmoke and fire early detection system\u003c\/li\u003e\n\u003cli\u003eBeginner Arduino gas sensing project\u003c\/li\u003e\n\u003cli\u003eSchool and college safety demonstration\u003c\/li\u003e\n\u003cli\u003eFirst Arduino project for new makers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOrder now from Xsortex HUB\u003c\/strong\u003e and get fast delivery across India. All components are tested for compatibility — just wire up and start coding!\u003c\/p\u003e","brand":"Xsortex HUB","offers":[{"title":"Default Title","offer_id":52625337450628,"sku":"KIT-UNO-GAS-001","price":499.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0996\/6472\/4100\/files\/UNOGas_SmokeWarning.png?v=1786178994","url":"https:\/\/www.xsortexhub.com\/products\/uno-gas-smoke-warning-project-combo-arduino-uno-r3-mq-2-sensor-buzzer-led","provider":"Xsortex HUB","version":"1.0","type":"link"}