DoorGuard — Fire Door Hold-Open Controller

About this project

DoorGuard is a fire door hold-open device controller built on Arduino Uno that automatically releases fire-rated doors during fire alarm conditions. The system uses a 12V electromagnet to hold fire doors open during normal building operations, improving accessibility and traffic flow. When a fire alarm input signal is received, the electromagnet immediately de-energizes, releasing the door to close automatically and prevent smoke/fire spread. A manual override button allows testing door closure without triggering building alarms. The 16×2 I2C LCD displays door status (HELD OPEN / RELEASED), alarm input state, and hold duration. This project demonstrates fire door management principles required by building codes to balance daily accessibility with fire compartmentation safety.

What you get

• Complete, commented source code
• Full components list with quantities
• Pin-by-pin wiring guide and connection table
• Step-by-step upload and testing guide
• Project report (.docx, IEEE style)
• Presentation slides (.pptx)