HardLabs

UBBB 32u4

thebiguno·microcontroller-projects·projects/ubbb32_u4/kicad/ubbb_32u4.kicad_pcb

UBBB 32u4 PCB layout, top view — open source AVR/Arduino board by thebiguno
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About the UBBB 32u4 PCB

UBBB 32u4 is an open source AVR/Arduino PCB design by thebiguno, published on GitHub. It is a 2-layer board measuring 20.3 × 41.9 mm, with 34 components from 17 distinct parts.

Its main chip is the ATMEGA32U4-A, from the AVR/Arduino family. By type, the board carries 9 capacitors, 8 connectors, 8 resistors, 2 switches, 2 diodes and 1 IC.

From the project

A home for a bunch of microcontroller projects which don't warrant their own repos.

microcontroller-projects ========================

A home for my microcontroller projects, including Stubby the Hexapod and others. It includes libraries for avr-gcc along with sample programs on how to use them, some KiCad modules, and the source code for a number of projects.

Some major projects include: Stubby the Hexapod (http://stubby.digitalcave.ca/stubby/) (Now extracted into its own repo at https://github.com/thebiguno/stubby) DrumMaster (http://drummaster.digitalcave.ca/drummaster/) * Chiindii (http://chiindii.digitalcave.ca/chiindii/)

Main components on the UBBB 32u4

ATMEGA32U4-A

UBBB 32u4 bill of materials (BOM)

34 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-A
U1
1
CRYSTAL_SMD_4PIN
X1
1
USB-MINI-B
CON1
1
CONN_10X2
ISP
P1
6
CONN_5
P2, P3, P4, P5, P6, P7
1
PINS_4
K1
1
MOUNTING_HOLE
MP1
2
SW_PUSH_SMALL
SW1, SW2
1
VAL**
WJ10
1
RGB_LED_COMMON_ANODE_ALT1
D1
1
TVS
D2
2
8pF
C1, C2
6
0.1uF
C3, C5, C6, C7, C8, C9
1
1uF
C4
2
22
R1, R2
5
1k
R3, R4, R5, R6, R7
1
0
R8

UBBB 32u4 design files

The KiCad project lives in the thebiguno/microcontroller-projects repository on GitHub; these links point at the commit this page was built from.

UBBB 32u4: common questions

What microcontroller does the UBBB 32u4 use?

The UBBB 32u4 is built around the ATMEGA32U4-A, from the AVR/Arduino family.

How big is the UBBB 32u4 PCB?

The UBBB 32u4 measures 20.3 × 41.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the UBBB 32u4?

34 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the UBBB 32u4 design files?

From the thebiguno/microcontroller-projects repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the UBBB 32u4 design in my own project?

The repository has no license, so all rights stay with thebiguno. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the UBBB 32u4 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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