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Mchck board

mchck·mchck-board

Mchck board layout, top view — open source NXP board by mchck

About the Mchck board

Mchck board is an open source NXP PCB design by mchck, published on GitHub under the Custom license license. It is a 2-layer board measuring 36.6 × 18.8 mm, with 36 components from 29 distinct parts.

Its main chip is the MK20LF, from the NXP family. Other key parts include the MCP73831-SOT, SPI_FLASH-X25XXSMD and MULTIREG. By type, the board carries 11 capacitors, 7 connectors, 4 ICs, 4 resistors, 3 diodes and 2 inductors.

From the project

MC HCK board schematic and layout

The goal is to have a small, cheap, and powerful development board that supports USB for easy programming, at a low price (current estimate: $7, target $5). This allows us to use the board for all silly purposes where spending >$20 for other microcontroller boards is just too much.

The schematic design and layout was done using KiCad , a Free Software EDA tool for Linux, Windows and Mac OS. You will need KiCad to open the .sch or .brd files - gEDA or Eagle will not work.

Main components on the Mchck board

MK20LFMCP73831-SOTSPI_FLASH-X25XXSMDMULTIREG

Mchck board bill of materials (BOM)

36 components, 29 distinct parts.

QtyPartRefs
1
MK20LF
U1
1
MCP73831-SOT
U2
1
SPI_FLASH-X25XXSMD
U3
1
MULTIREG
U4
1
CRYSTAL32-SMD
Y1
1
MICRO_USB
J3
1
CHG
P5
1
LIPO
P7
1
5V
P9
1
GND
P10
1
D-
P11
1
D+
P12
1
MOUNTHOLE
H1
1
TAC_SWITCHSMD_EVQP2
S1
1
SOLDERJUMPERNO
SJ5
1
SOLDERJUMPERNC
SJ6
1
LED
D1
1
CDBU0530
D2
1
CDBU0530
D3
1
FILTER
FB1
Show 9 more
QtyPartRefs
1
INDUCTOR_SELECT
L1
2
2.2u
C1, C2
4
100n
C3, C4, C5, C6
1
4.7u
C7
2
100n
C8, C10
2
10u
C11, C12
2
33
R1, R2
1
1k
R3
1
20k
R4

Mchck board design files

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

Mchck board: common questions

What microcontroller does the Mchck board use?

The Mchck board is built around the MK20LF, from the NXP family.

How big is the Mchck board?

The Mchck board measures 36.6 × 18.8 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Mchck board?

36 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mchck board design files?

From the mchck/mchck-board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Mchck board design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Mchck board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.

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