A Smart Helmet with Alcohol Detection is a safety device designed to prevent drunk driving accidents. The helmet is equipped with an alcohol sensor that detects the rider’s breath before starting the vehicle. If alcohol is detected above the permissible limit, the system prevents the bike’s ignition from starting.

The helmet can also integrate additional safety features like helmet wearing detection and accident alert systems, ensuring that the rider follows proper safety protocols before riding.

Parts Used:

1. Helmet Shell – standard ISI/BIS-certified helmet
2. Alcohol Sensor (MQ-3 or MQ-135) – detects alcohol concentration in breath
3. Microcontroller (Arduino / ESP32) – processes sensor readings
4. Relay Module – controls bike ignition circuit
5. Helmet Wearing Detection Sensor (Reed switch / IR sensor) – ensures helmet is worn
6. Buzzer / LED Indicators – alerts the rider about detection status
7. Battery / Power Supply – powers the electronics
8. Optional: Bluetooth module for mobile alerts, GPS module for accident location sharing