MCU-Datalogger-KICAD

PROJECT OVERVIEW

MCU Datalogger — ATmega328P-based data logging PCB with DS1307 real-time clock, dual I²C EEPROM storage (24LC025 + 24LC1025), battery backup, UART/SPI/I²C breakout headers, and ICSP programming port. Designed in KiCad 10 on a 4-layer stackup. Includes full schematic, PCB layout, and Gerber files.

CIRCUIT DETAILS

• ATmega328P-AU — 8-bit AVR MCU, 32KB Flash, 2KB SRAM, 1KB internal EEPROM
• DS1307 RTC — Real-time clock with battery backup (CR2032), accurate timekeeping even when power is off
• Dual I²C EEPROM — 24LC025 (2 Kbit) for config + 24LC1025 (1 Mbit / 128 KB) for data logging
• 16 MHz crystal — External clock for stable UART and precise timing
• 32.768 kHz crystal — Dedicated RTC oscillator (2¹⁵ Hz → 1 Hz via internal counter)
• Full I/O breakout — GPIO, UART, I²C, SPI headers for easy sensor/peripheral connection
• ICSP header — In-circuit programming without a bootloader
• 4-layer PCB — F.Cu / In1.Cu / In2.Cu / B.Cu stackup for clean power and signal integrity
• 4× mounting holes — M3, corner-placed for enclosure or standoff mounting

TOOLS USED

• SIMULATION-LTSpice
• PCB(Schematic and layout capture)-KICAD
• FABRICATION-JLCPCB

FILES INCLUDED

• GERBER FILES
• LICENSE
• PDF FILES
• SCREENSHOTS
• SOURCE FILES

PCB PREVIEW

SCHEMATIC PREVIEW

BOM

STATUS

• Schematic Captured
• PCB Layout Captured
• GERBERS Generated

AUTHOR

STEPHEN.J - PCB DESIGN ENGINEER