HardLabs

Micro-VX

RoboKamu·Micro-VX·Hardware/Micro-VX/Micro-VX.kicad_pcb

Micro-VX PCB layout, top view — open source STM32 board by RoboKamu

About the Micro-VX PCB

Micro-VX is an open source STM32 PCB design by RoboKamu, published on GitHub. It is a 4-layer board measuring 41.8 × 33 mm, with 37 components from 26 distinct parts.

Its main chip is the STM32L432KBU6, from the STM32 family. Other key parts include the AMS1117-3.3, C189624 and USBLC6-2SC6. By type, the board carries 15 capacitors, 9 resistors, 4 ICs, 4 connectors, 2 diodes and 1 switch.

It belongs with the audio and test & measurement designs in this gallery.

From the project

Mini Audio Wave and FFT Visualizer on Custom PCB based on STM32L4

The PCB is based on the original schematic for microphone. This works correctly with the Accelerometer project, however, not with the audio analyzer. For the latter, a resistor has to be desoldered and another added. This is mentioned in the microphone section in the schematic.

Below is an image showing the crude modification to the left, and the original PCBA to the right.

Micro-VX, from the project README
From the project README

Main components on the Micro-VX

STM32L432KBU6AMS1117-3.3C189624USBLC6-2SC6

Micro-VX bill of materials (BOM)

37 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32L432KBU6
U1
1
AMS1117-3.3
U2
1
C189624
~
U3
1
USBLC6-2SC6
U4
1
C132560
USB_B_Micro
J1
1
CONN_01X04_PIN
Conn_01x04_Pin
J2
1
CONN_01X04_SOCKET
Conn_01x04_Socket
J3
1
SCREW_TERMINAL_01X02
Screw_Terminal_01x02
J4
1
B4013AM423-093
Goertek(歌尔)
MIC1
1
C97433
SW_SPDT
SW1
1
LED
D1
1
C74179
D_Schottky
D2
1
120R
FB1
5
100N
100n
C1, C2, C7, C13, C14
3
10U
10u
C3, C12, C15
1
10N
10n
C4
2
1u
C5, C6
3
22U
22u
C8, C9, C11
1
22N
22n
C10
3
10K
10k
R1, R5, R6
Show 6 more
QtyPartRefs
1
1K5
1k5
R2
1
100
R3
1
47K
330
R4
1
2K2
2k2
R7
1
1K2
1200
R8
1
2000
R9

Micro-VX design files

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

Micro-VX: common questions

What microcontroller does the Micro-VX use?

The Micro-VX is built around the STM32L432KBU6, from the STM32 family.

How big is the Micro-VX PCB?

The Micro-VX measures 41.8 × 33 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Micro-VX?

37 components, from 26 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 Micro-VX design files?

From the RoboKamu/Micro-VX 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 Micro-VX design in my own project?

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

Can I test firmware for the Micro-VX 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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