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MOA-R-B

therealprof·MOA-R-B

MOA-R-B PCB layout, top view — open source STM32 board by therealprof

About the MOA-R-B PCB

MOA-R-B is an open source STM32 PCB design by therealprof, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 91.4 × 99.1 mm, with 53 components from 34 distinct parts.

Its main chip is the STM32F042F6Px, from the STM32 family. Other key parts include the LPC824M201JDH20, E73-2G4M04S-52832, MIC5504-3.3YM5 and USBLC6-2SC6. By type, the board carries 13 connectors, 13 capacitors, 9 diodes, 9 resistors, 6 ICs and 2 switches.

It belongs with the usb & debug tools designs in this gallery.

From the project

The mother of all Rust boards

The MOA(R)B is a proof of concept proto board which breaks out 4 MCUs from different vendors which are readily supported by the Rust programming language and adds a DAP42 USB debugger/programmer with virtual serial port as well as the requisite USB port and voltage regulator for good measure.

The MOA(R)B was developed to demonstrate how easy it is to design and manufacture Rust-able microcontroller designs. The original plan was to give a talk about this at Oxidize 2019 but that didn't happen. The board is still the first iteration (with a minor fix applied) and I don't expect to further…

MOA-R-B, from the project README
From the project README

Main components on the MOA-R-B

STM32F042F6PxLPC824M201JDH20E73-2G4M04S-52832MIC5504-3.3YM5USBLC6-2SC6

MOA-R-B bill of materials (BOM)

53 components, 34 distinct parts.

QtyPartRefs
2
STM32F042F6Px
U1, U3
1
LPC824M201JDH20
U2
1
E73-2G4M04S-52832
U4
1
MIC5504-3.3YM5
U6
1
USBLC6-2SC6
U8
1
Conn MCU 2
J1
1
Conn MCU 1
J2
1
SWD
J3
1
LEDs
J4
1
Conn Power
J5
1
SWD
J6
1
PWR IN
J7
1
Conn MCU 3_1
J8
1
USB_B_Micro
J9
1
Conn MCU 4_1
J10
1
Conn MCU 3_2
J11
1
Conn MCU 4_2
J12
1
Serial
J13
1
ATSAMD21E15A
ATSAMD21E15
1
RESET
SW1
Show 14 more
QtyPartRefs
1
BOOT
SW2
1
PWR LED
D1
1
D
D2
1
MCU1LED
D3
1
MCU2LED
D4
1
MCU3LED
D5
1
MCU4LED
D6
1
LED0
D7
1
LED1
D8
1
LED2
D9
11
100n
C1, C2, C3, C4, C5, C6, C7, C8 +3
2
1µ
C9, C10
1
10k
R1
8
470
R2, R3, R4, R5, R6, R7, R8, R9

MOA-R-B design files

The KiCad project lives in the therealprof/MOA-R-B repository on GitHub; these links point at the commit this page was built from.

MOA-R-B: common questions

What microcontroller does the MOA-R-B use?

The MOA-R-B is built around the STM32F042F6Px, from the STM32 family.

How big is the MOA-R-B PCB?

The MOA-R-B measures 91.4 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MOA-R-B?

53 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the MOA-R-B design files?

From the therealprof/MOA-R-B repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the MOA-R-B design in my own project?

Yes, under the terms of its BSD-3-Clause license, which therealprof chose for the repository.

Can I test firmware for the MOA-R-B without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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