Detects alcohol vapor in the driver’s breath, providing an analog output proportional to the concentration of alcohol. Arduino Uno Microcontroller: The core processing unit that receives input from ...

OBJECTIVE The primary objective of the alcohol detector and engine locking system using Arduino Uno and MQ-3 sensor is to prevent drunk driving by disabling a vehicle’s ignition if the driver’s blood ...

Abstract: Drunk driving remains a significant issue worldwide, with thousands of lives lost every year due to accidents caused by individuals operating vehicles under the influence of alcohol. The ...