Features

• Utilizes NodeMCU ESP8266 for wireless connectivity and data transmission to monitor gas levels, temperature, and humidity.
• Incorporates MQ-2 or MQ-135 gas sensor for detecting harmful gases, ensuring timely alerts and prevention of gas-related accidents.
• Includes temperature and humidity sensor (DHT11) for monitoring environmental conditions and preventing heat-related illnesses.
• Features a buzzer and LED light for immediate alerts and signaling in case of dangerous conditions.
• Equipped with a DC jack for easy charging and powering of the helmet using 18650 Li-ion batteries.
• Utilizes an LM7805 voltage regulator to ensure stable power supply to all components.
• Includes a switch for manual control and activation of safety features.
• Features an LCD display (16×2) for real-time visualization of sensor data and system status.
• Comes with 18650 Li-ion batteries and a Li-ion battery charger for convenient power management.

Components

Component	Function
NodeMCU ESP8266	Wireless connectivity and data transmission.
MQ-2 or MQ-135 Gas Sensor	Detects harmful gases.
Temperature and Humidity Sensor (DHT11)	Monitors environmental conditions.
Buzzer	Provides immediate alerts.
LED Light	Signals dangerous conditions.
DC Jack	Charging and powering the helmet.
LM7805 Voltage Regulator	Ensures stable power supply.
Switch	Manual control for safety features.
LCD Display (16×2)	Real-time visualization of data.
18650 Li-ion Batteries	Power source for continuous operation.
Li-ion Battery Charger	Convenient power management.

Working

• The NodeMCU ESP8266 establishes a wireless connection to transmit data from the helmet’s sensors to a monitoring system.
• The MQ-2 or MQ-135 gas sensor detects the presence of harmful gases, triggering alerts in case of dangerous levels.
• The temperature and humidity sensor (DHT11) monitors environmental conditions to prevent heat-related illnesses and ensure worker comfort.
• In case of detected hazards, the buzzer and LED light provide immediate alerts to the worker and surrounding personnel.
• The DC jack allows for easy charging and powering of the helmet using 18650 Li-ion batteries, ensuring continuous operation during work shifts.
• The LM7805 voltage regulator maintains a stable voltage supply to all components, preventing power fluctuations and ensuring reliable operation.
• A switch enables manual control and activation of safety features as needed.
• The LCD display (16×2) provides real-time visualization of sensor data and system status, allowing for quick assessment of environmental conditions.

Applications

• Mining Safety: Enhances safety measures in mining environments by detecting hazardous gases and monitoring environmental conditions to prevent accidents and ensure worker well-being.
• Industrial Safety: Suitable for use in various industrial settings where exposure to harmful gases and extreme temperatures poses risks to worker safety.
• Emergency Response: Facilitates timely response to dangerous conditions by providing immediate alerts and signaling to workers and emergency personnel.
• Workplace Health Monitoring: Enables continuous monitoring of environmental conditions to prevent heat-related illnesses and ensure optimal working conditions for workers.