MCU-Data-Logger
VishwanathKambalyal·MCU-Data-Logger·Hardware/Layout (2 Layer).kicad_pcb
About the MCU-Data-Logger PCB
MCU-Data-Logger is an open source AVR/Arduino PCB design by VishwanathKambalyal, published on GitHub. It is a 2-layer board measuring 53 × 40.3 mm, with 25 components from 16 distinct parts.
Its main chip is the ATMEGA328P-AU, from the AVR/Arduino family. Other key parts include the 24LC1025 and DS1337S_. By type, the board carries 7 resistors, 5 capacitors, 4 ICs, 4 connectors, 2 crystals and 2 diodes.
It belongs with the sensors designs in this gallery.
From the project
Data logger
MCU Data Logger is a hardware-based data logging system designed to record and store data efficiently. The system is built using the ATmega328P-AU microcontroller, 24LC1025 EEPROM, and DS1337 RTC for precise timekeeping. The hardware is designed in KiCad 9, with 2-layer PCB.
- 🖥️ ATmega328P-AU (MCU) - Serves as the main processing unit. - Handles data acquisition, processing, and communication. - Supports multiple communication protocols (UART, SPI, I2C).

Main components on the MCU-Data-Logger
MCU-Data-Logger bill of materials (BOM)
25 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 24LC1025 | SOIC-8_5.23x5.23mm_P1.27mm | U1, U2 |
| 1 | DS1337S_ | SOIC127P600X175-8N | U3 |
| 1 | ATMEGA328P-AU | QFP80P900X900X120-32N | U4 |
| 1 | 16MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm_HandSoldering | Y1 |
| 1 | 32.768 KHz | Crystal_SMD_5032-2Pin_5.0x3.2mm_HandSoldering | Y2 |
| 2 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 1 | Conn_01x09_Pin | PinHeader_1x09_P2.54mm_Vertical | J3 |
| 1 | Conn_02x03_Counter_Clockwise | PinHeader_2x03_P2.54mm_Vertical | J4 |
| 1 | Battery_Cell | PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 2 | LED | LED_0805_2012Metric | D1, D2 |
| 2 | 0.1uF | C_0805_2012Metric | C1, C4 |
| 2 | 22pF | C_0805_2012Metric | C2, C3 |
| 1 | 100nF | C_0805_2012Metric | C5 |
| 2 | 330 | R_0805_2012Metric | R1, R2 |
| 3 | 10K | R_0805_2012Metric | R3, R6, R7 |
| 2 | 4.7K | R_0805_2012Metric | R4, R5 |
MCU-Data-Logger design files
The KiCad project lives in the VishwanathKambalyal/MCU-Data-Logger repository on GitHub; these links point at the commit this page was built from.
MCU-Data-Logger: common questions
What microcontroller does the MCU-Data-Logger use?
The MCU-Data-Logger is built around the ATMEGA328P-AU, from the AVR/Arduino family.
How big is the MCU-Data-Logger PCB?
The MCU-Data-Logger measures 53 × 40.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MCU-Data-Logger?
25 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the MCU-Data-Logger design files?
From the VishwanathKambalyal/MCU-Data-Logger repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MCU-Data-Logger design in my own project?
The repository has no license, so all rights stay with VishwanathKambalyal. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the MCU-Data-Logger without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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