This circuit mainly uses MQ2 Smoke/Gas sensor and Arduino to detect and calculate the level of smoke. MQ2 gas sensor is also sensible to LPG, Alcohol, and Methane etc. This Smoke Detector can be ...

Power up the sensor through Arduino and connect the A0 pin of the sensor to A5 of Arduino. Connect a buzzer and an LED in a parallel configuration. Connect their one end to the ground of Arduino and ...

Fire Detection:Uses a Flame Sensor to detect fire in the vicinity. Smoke Detection:Uses a MQ-2 Gas Sensor to detect smoke or harmful gases. Alert System: Utilizes a Buzzer and/or LED to alert when ...

MQ-5 Gas Sensor with Arduino UNO – Connection Diagram. Now that we understand how the MQ-5 gas sensor operates, we can connect all of the necessary wires to an Arduino Uno and test it out. We'll start ...

It really is a hands-on way to learn electronics and programming while building a useful gadget. Get your Arduino board and gas sensor to start creating your smoke detector today. Write a code for ...

Fig. 1 shows circuit diagram of the smoke detection alarm. The basic unit employs dual op-amp LM358 (IC1), transistor T1 and timer NE555 (IC2), configured in astable mode. Selection of MQ* sensor is ...

Indoor pollution is a major cause of worry in homes and other enclosed environments. It is possible that prolonged exposure to the residues of heavy metals and particulate matter released into the air ...