• 2026-05-08
• A.O. Akinola, A.B. Osasona, O.J. Opaleti, T.D. Okerinde, A.O. Oke, J.O. Oluwabiyi, E.T. Olalekan
• Volume 2, Issue 1

Abstract

This paper presents the design and implementation of an integrated smoke alarm and spark plug voltage detector monitoring system for automobiles, The system employed an MQ-2 gas sensor to detect combustible gases such as methane, and carbon monoxide, with a sensitivity threshold of 250 ppm and an ACS712 Hall-effect sensor for non-invasive spark plug voltage monitoring, interfaced with an Arduino Uno/ESP32 microcontroller for real time data processing and multi-modal alerts (buzzer, LED, LCD). Prototype testing validated rapid smoke detection within 2 seconds and accurate identification of ignition faults via voltage pulse analysis of 300–600 mV for healthy plugs, and >1000 mV for faulty spark plugs., ensuring reliability under high-temperature and vibratory engine conditions. A power consumption of 1.34 W practically offerred a scalable solution for resource constrained automotive sector, reducing economic disruptions and environmental impacts from vehicle fires.