This project report details the design and fabrication of a smoke detector alarm, undertaken as part of an electrical engineering course. The project involved designing, constructing, and calibrating a smoke detector using an MQ2 sensor, an Atmega 32A microcontroller, an LCD module, and other components. The objectives included developing audio and visual warnings for smoke detection and comparing smoke and heat detectors. The student's responsibilities included preparing sketches, maintaining inventories, and documenting the project. The report discusses the engineering knowledge applied, including the use of electrical tools and blueprint reading. It also covers the theory behind smoke detection, comparing photoelectric and ionization detectors, and the use of the MQ2 sensor for gas detection. The report identifies issues such as battery longevity and AC wiring problems, offering solutions like battery tray modifications and circuit breaker adjustments. The project emphasizes collaborative work and the application of electrical engineering principles to create an innovative smoke detection system.