Compact 4-layer data logger PCB built around the ATmega328P-AU, with dual I²C EEPROMs and a DS1337 RTC for reliable, timestamped sensor data logging.
The PCB was designed as a compact 4-layer board using KiCad. Particular attention was given to component placement, power distribution, signal routing, and the I²C connections between the microcontroller, EEPROMs, and RTC.