HardLabs

BMEKv3

Bemeier·bmek·pcb/kicad/projects/BMEK_Hotswap/BMEK_Hotswap.kicad_pcb

BMEKv3 PCB layout, top view — open source AVR/Arduino board by Bemeier
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About the BMEKv3 PCB

BMEKv3 is an open source AVR/Arduino PCB design by Bemeier, published on GitHub. It is a board measuring 353.8 × 116.1 mm, with 188 components from 24 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6. By type, the board carries 17 capacitors, 8 resistors, 7 diodes, 2 ICs, 2 connectors and 1 crystal.

From the project

There are two projects, one for the solder version, one for the hotswap version.

There are two projects, one for the solder version, one for the hotswap version.

You'll need a recent nightly version of Kicad to open these (sorry, next time I'll use stable to create a project :) ).

This project contains V3 of the PCBs (see ../v3)

Main components on the BMEKv3

ATMEGA32U4-AUUSBLC6-2SC6

BMEKv3 bill of materials (BOM)

188 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4-AU
U1
1
USBLC6-2SC6
U2
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
Y1
1
Conn_01x04
J1
1
AVR-ISP-6
J2
67
1N4148W
DU_0_0, DU_0_1, DU_0_2, DU_0_3, DU_0_4, DU_0_5, DU_0_6, DU_0_7 +59
1
TLC-PSMD050
F1
72
MX-NoLED
MX_0_0, MX_0_1, MX_0_2, MX_0_3, MX_0_4, MX_0_5, MX_0_6, MX_0_7 +64
8
MX-Stabiliser
ST_0_14b1, ST_2_14, ST_3_1, ST_3_13, ST_4_5, ST_4_5b1, ST_4_8b1, ST_8_5
1
TS-1187A-B-A-B
SW1
1
HRO-TYPE-C-31-M-12
USB1
1
PCBProfile
V1
1
SMF6.0A
D1
6
WS2812B
D2, D3, D4, D5, D6, D7
2
22PF
22pF
C1, C2
1
1UF
1uF
C3
12
0U1F
0u1F
C4, C5, C6, C7, C8, C9, C12, C13 +4
1
4U7F
4u7F
C10
1
4N7F
4n7F
C11
2
22Ω
R1, R2
Show 4 more
QtyPartRefs
2
C23186
5k1Ω
R3, R4
1
1MΩ
R5
2
10kΩ
R6, R7
1
470Ω
R8

BMEKv3 design files

The KiCad project lives in the Bemeier/bmek repository on GitHub; these links point at the commit this page was built from.

BMEKv3: common questions

What microcontroller does the BMEKv3 use?

The BMEKv3 is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the BMEKv3 PCB?

The BMEKv3 measures 353.8 × 116.1 mm and is 1.6 mm thick.

How many components are on the BMEKv3?

188 components, from 24 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 BMEKv3 design files?

From the Bemeier/bmek repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the BMEKv3 design in my own project?

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

Can I test firmware for the BMEKv3 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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