Agadang, Denver S.Lopez, Jamaica L.Nisperos, Angela A.Quindara, Christian Dave L.Tino, Chester T.2026-09-122026-09-122025-05Agadang, D. S., Lopez, J. L., Nisperos, A. A., Quindara, C. D. L., Tino, C. T. (2025). Microcontroller-based security system with multiple sensors for robbery/theft. [Unpublished Undergraduate Thesis]. Don Mariano Marcos Memorial State University – Mid La Union Campus, City of San Fernando, La Union. Lakasa ti Sirib, DMMMSU Institutional Repository.https://lakasa.dmmmsu.edu.ph/handle/123456789/2545Abstract onlyThe Microcontroller Based Security System with Multiple Sensors for Robbery/Theft is a security system used to reduce the success rate of robbery/theft for the said establishment, serving as a cost-effective, long-term investment for a profitable business which provides more efficient and faster crime response, leading to unsuccessful robbery/theft related crime and a safer environment. The concept and design of the Microcontroller Based Security System with Multiple Sensors for Robbery/Theft was feasible using a microcontroller. This research used project development type of research design and the Engineering Design Process (EDP) to conceptualized the design and specifications of the security system. The researchers also made revisions after testing and observation until the security system was deemed functional and acceptable. Overall results show that the microcontroller-based security system with multiple sensors for robbery/theft was deemed functional in monitoring the amount of time it activates through the laser sensor, voice recognition, and the switch.enThesis