This circuit mainly uses MQ2 Smoke/Gas sensor and Arduino to detect and calculate the level of smoke. MQ2 gas sensor is ... (output connected at pin D7). Also smoke sensor output is connected at an ..

Smoke Detection: The MQ-2 sensor detects smoke or harmful gases by measuring the concentration in the air. When the smoke level exceeds a set threshold, the system activates the buzzer and LED. Alert: ...

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 ...

When the output of IC2 at its pin 1 goes high after sensing smoke from the sensor, UM3562 receives 3.1V at its Vcc pin, resulting in sound production. Transistors T2 and T3 act as a Darlington pair to ...

This optical smoke detector uses a low-cost, readily-available, slotted, through-scan, infrared photo-switch. When smoke is detected, the relay energises to activate the audio/visual warning alarm.

return val; } /***** MQRead ***** Input: mq_pin - analog channel Output: Rs of the sensor Remarks: This function use MQResistanceCalculation to caculate the sensor resistenc (Rs). The Rs changes as ...

The following image shows the circuit diagram for interfacing the flame sensor module with Arduino. Connections are pretty simple and only require three wires. Connect the VCC and GND of the module to ...

In this article, I have added three sensors with Arduino UNO and user can choose the required sensor with the help of keypad. Hi there! I hope you are doing great. Today I am sharing the Proteus ...