HardLabs

UniversalboxArm

Solartraveler·UniversalboxArm·schematic/UniversalboxArm1-0.kicad_pcb

UniversalboxArm PCB layout, top view — open source STM32 board by Solartraveler

About the UniversalboxArm PCB

UniversalboxArm is an open source STM32 PCB design by Solartraveler, published on GitHub. It is a 4-layer board measuring 112 × 57 mm, with 153 components from 66 distinct parts.

Its main chip is the STM32L452RETx, from the STM32 family. Other key parts include the USBLC6-2SC6, LP38693MP-3.3, ATtiny861A-SU, REF3020 and MCP6542. By type, the board carries 45 resistors, 33 capacitors, 25 diodes, 16 transistors, 11 connectors and 10 ICs.

It belongs with the displays & leds designs in this gallery.

From the project

PCB for experimenting with a STM32

Have a box for experiments and easy testing with a CPU which is more powerful than an AVR (Arduino) and uses less energy than a Raspberry Pi. Then add some common peripherals and fit this into a case.

The following hardware has been added. Not everything is required to be populated on the PCB.

- STM32L452RET (80MHz, 160KiB RAM) tested

- Can run from a LiFePO battery and charge it

UniversalboxArm, from the project README
From the project README

Main components on the UniversalboxArm

USBLC6-2SC6LP38693MP-3.3ATtiny861A-SUREF3020MCP6542AT45DB641-SSTM32L452RETxMCP65R41T-1202EMAX3221TSOP312xx

UniversalboxArm bill of materials (BOM)

153 components, 66 distinct parts.

QtyPartRefs
1
USBLC6-2SC6
U1
1
LP38693MP-3.3
U2
1
ATtiny861A-SU
U20
1
REF3020
U21
1
MCP6542
U22
1
AT45DB641-S
U50
1
STM32L452RETx
U60
1
MCP65R41T-1202E
U61
1
MAX3221
U110
1
TSOP312xx
U130
1
BCX56-16
Q20
8
BSS138
Q21, Q22, Q25, Q60, Q90, Q91, Q92, Q93
5
IRLML6402
Q23, Q24, Q50, Q51, Q120
2
IRLML6344
Q61, Q62
1
32768Hz
Y60
1
8MHz
Y61
1
USB_B_Micro
J1
1
AVR-ISP-6
J20
1
Conn_01x14_Female
J50
1
Conn_01x06_Female
J60
Show 46 more
QtyPartRefs
1
Conn_02x08_Odd_Even
J61
2
Conn_02x04_Odd_Even
J62, J91
1
Conn_02x03_Odd_Even
J90
1
Conn_01x03_Male
J110
1
Conn_02x04_Counter_Clockwise
J120
1
Conn_01x02_Male
J121
1
Battery_Cell LiFePo
BT20
1
0.50A
F20
4
IM01
K90, K91, K92, K93
4
SW_SPST
SW60, SW61, SW62, SW63
1
KTY81-221
TH20
3
SK14
D1, D2, D3
5
BAT54C
D20, D21, D62, D63, D64
1
TL431DBZ
D22
6
BAS32L
D23, D24, D90, D91, D92, D93
1
LED
D25
2
LED_Dual_AAC
D60, D61
6
PESD5V2S2UT
D65, D66, D67, D69, D70, D71
1
PESD24V2S2UT
D68
4
10µF
C1, C2, C20, C23
2
100µF
C3, C4
17
100nF
C21, C22, C26, C50, C51, C60, C61, C62 +9
1
10nF
C24
1
470nF
C25
3
4.7µF
C66, C71, C130
2
10pF
C67, C68
2
22pF
C69, C70
1
4.7µF
C120
2
100kΩ
R1, R40
1
3.9Ω
R20
2
33kΩ
R21, R23
2
15kΩ
R22, R24
1
9100Ω
R25
2
22kΩ
R26, R39
2
47kΩ
R28, R29
10
220kΩ
R30, R51, R60, R61, R67, R69, R90, R91 +2
2
100Ω
R31, R36
1
10kΩ
R32
1
4.7kΩ
R33
1
470Ω
R34
3
330Ω
R35, R63, R65
1
150Ω
R37
1
12kΩ
R38
1
1kΩ
R41
2
56kΩ
R50, R120
10
180Ω
R52, R53, R62, R64, R66, R68, R70, R71 +2

UniversalboxArm design files

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

UniversalboxArm: common questions

What microcontroller does the UniversalboxArm use?

The UniversalboxArm is built around the STM32L452RETx, from the STM32 family.

How big is the UniversalboxArm PCB?

The UniversalboxArm measures 112 × 57 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the UniversalboxArm?

153 components, from 66 distinct parts. The full bill of materials is listed on this page.

Where can I download the UniversalboxArm design files?

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

Can I use the UniversalboxArm design in my own project?

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

Can I test firmware for the UniversalboxArm 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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