ATmega32u4 Development Board
CafeAsh·DevBoards·ATmega32u4_Dev/ATmega32u4_Dev.kicad_pcb
About the ATmega32u4 Development Board
ATmega32u4 Development Board is an open source AVR/Arduino PCB design by CafeAsh, published on GitHub. It is a 4-layer board measuring 25.5 × 40.7 mm, with 33 components from 19 distinct parts.
Its main chip is the ATmega32U4-A, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6. By type, the board carries 12 capacitors, 8 resistors, 4 connectors, 3 diodes, 2 ICs and 1 crystal.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Development board based on the ATmega32U4 microcontroller, designed for USB-enabled embedded projects, rapid prototyping, and firmware experimentation.
Development board based on the ATmega32U4 microcontroller, designed for USB-enabled embedded projects, rapid prototyping, and firmware experimentation.
This project provides a hardware platform built around the ATmega32U4, a microcontroller with native USB support.
USB HID devices (keyboards, mice, gamepads) Serial communication over USB (CDC) Custom USB devices General embedded applications

Main components on the ATmega32u4 Development Board
ATmega32u4 Development Board bill of materials (BOM)
33 components, 19 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATmega32U4-A | QFP80P1200X1200X120-44N | U1 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U2 |
| 1 | ABM8-16.000MHZ-10-1-U-T | XTAL_ABM8-16.000MHZ-10-1-U-T | Y1 |
| 1 | USB4105-GF-A | GCT_USB4105-GF-A | J1 |
| 1 | ICSP HEader 2x3 | 02x03 Header | J2 |
| 2 | Conn_01x14_Pin | 01x14 Header (2.54 Pitch) | J3, J4 |
| 1 | 0805L050WR | Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F1 |
| 1 | 1825910-6 | Generic SW 3x4mm | SW1 |
| 2 | YY0603RE-RN2S1-T2AR4 | LED_0603_1608Metric | D1, D3 |
| 1 | PTVS5V0Z1USKYL | Nexperia_DSN1608-2_1.6x0.8mm | D2 |
| 1 | HI0805Q310R-10 | L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | 4.7u | C_0402_1005Metric | C1 |
| 8 | 0.1u | C_0402_1005Metric | C3, C4, C5, C6, C10, C11, C12, C13 |
| 1 | 1u | C_0402_1005Metric | C7 |
| 2 | 22p | C_0402_1005Metric | C8, C9 |
| 2 | 5.1k | R_0402_1005Metric | R1, R2 |
| 2 | 22 | R_0402_1005Metric | R3, R4 |
| 2 | 10K | R_0402_1005Metric | R5, R6 |
| 2 | 1K | R_0402_1005Metric | R7, R8 |
ATmega32u4 Development Board design files
The KiCad project lives in the CafeAsh/DevBoards repository on GitHub; these links point at the commit this page was built from.
ATmega32u4 Development Board: common questions
What microcontroller does the ATmega32u4 Development Board use?
The ATmega32u4 Development Board is built around the ATmega32U4-A, from the AVR/Arduino family.
How big is the ATmega32u4 Development Board?
The ATmega32u4 Development Board measures 25.5 × 40.7 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the ATmega32u4 Development Board?
33 components, from 19 distinct parts. The full bill of materials is listed on this page.
Where can I download the ATmega32u4 Development Board design files?
From the CafeAsh/DevBoards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the ATmega32u4 Development Board design in my own project?
The repository has no license, so all rights stay with CafeAsh. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the ATmega32u4 Development Board 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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