ATMega328P Alarm Update - WDT and Interrupt and Custom PCB

Learn how to create a versatile alarm system using an ATMega328P microcontroller for detecting movement in dark places or monitoring open fridge doors. Explore the process of designing a custom PCB, implementing deep sleep functionality for extended battery life, and utilizing interrupts and watchdog timers. Discover tips for panelizing PCBs for SMD assembly, and gain insights into using tools like CoolTerm for serial communication. Follow along as the project evolves from prototype to final product, including code examples and component recommendations for building your own alarm system with low power consumption and long-lasting battery life.

Intro
PCBU Prototype
Circuit Diagram
Original Prototype
ESP Programming
Lessons Learned
The Fridge
The Code