HardLabs

Lux hub

ervanalb·lux·hub_hardware/lux hub.kicad_pcb

Lux hub PCB layout, top view — open source STM32 board by ervanalb

About the Lux hub PCB

Lux hub is an open source STM32 PCB design by ervanalb, published on GitHub. It is a 4-layer board measuring 105.4 × 52.1 mm, with 95 components from 32 distinct parts.

Its main chip is the STM32F042C6T6, from the STM32 family. Other key parts include the 3V3REG, CD74HC30M96, ISL83485IBZ-T, DT1452-02SO-7 and BTS4175SGA. By type, the board carries 38 resistors, 21 ICs, 14 capacitors, 10 diodes, 9 connectors and 1 transistor.

From the project

Light control protocol

- U3 - R42 - C3 is short - Fuse clips - CON1 holes should be bigger

- STM32F042 - 6 Lux outputs - 48V power, 5V/0V RS-422 data - Data lines tied together - Rx/Tx enable are indepedent - TVS on data lines - Per-output PTC fuses (which weren't useful) - USB for comms & non-48V power - Spec'd for 500mA current draw to drive 6 ports - Greenwire: 3v3 reg U1 pads are incorrect - Greenwire: Inrush limiter changed: R42 -> C; C1 -> R; R1 unpopulated - Greenwire: RX pin incorrect; shorted to TX LED

Main components on the Lux hub

3V3REGSTM32F042C6T6CD74HC30M96ISL83485IBZ-TDT1452-02SO-7BTS4175SGA

Lux hub bill of materials (BOM)

95 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
3V3REG
U1
1
STM32F042C6T6
STM32F042-32
STMICROELECTRONICS
U2
1
CD74HC30M96
4068
TEXAS INSTRUMENTS (VA)
U3
6
ISL83485IBZ-T
ISL83485IBZ
INTERSIL (VA)
U4, U6, U8, U10, U12, U14
6
DT1452-02SO-7
2CH-TVS
DIODES INCORPORATED (VA)
U5, U7, U9, U11, U13, U15
6
BTS4175SGA
U16, U17, U18, U19, U20, U21
1
DMP6023LE-13
DMP6023LE
DIODES INCORPORATED (VA)
Q1
1
48V
CON1
1
690-005-299-043
USB-MINI-B
EDAC INC (VA)
CON2
6
A-2004-0-4-LP-N-R
CONN_4
ASSMANN WSW COMPONENTS
P1, P2, P3, P4, P5, P6
1
CONN_4
P7
1
5A
F1
1
EVQ-PE104K
BOOT
PANASONIC ELECTRONIC COMPONENTS (VA)
SW1
1
LTST-C190KGKT
TX
LITE-ON INC (VA)
D1
1
LTST-C190KRKT
RX
LITE-ON INC (VA)
D2
6
LTST-C190KRKT
PWR
LITE-ON INC (VA)
D4, D6, D8, D10, D12, D14
1
LTST-C190KGKT
VDD
LITE-ON INC (VA)
D15
1
LTST-C190KRKT
+48V
LITE-ON INC (VA)
D16
1
GRM155R62A104KE14D
1u
MURATA ELECTRONICS (VA)
C1
1
CL21B105KAFNNNE
1u
SAMSUNG ELECTRO-MECHANICS AMERICA, INC (VA)
C2
Show 12 more
QtyPartRefs
1
470u
C3
1
CL21B225KAFNFNE
2u2
SAMSUNG ELECTRO-MECHANICS AMERICA, INC (VA)
C4
9
GRM155R71E104ME14D
100n
MURATA ELECTRONICS (VA)
C5, C6, C7, C8, C9, C10, C11, C12 +1
1
CL21A475KAQNNNG
4u7
SAMSUNG ELECTRO-MECHANICS AMERICA, INC (VA)
C15
1
RC0402JR-07100KL
100K
YAGEO (VA)
R1
1
RC0603JR-0715KL
15K
YAGEO (VA)
R2
8
RC0603JR-0710KL
10K
YAGEO (VA)
R3, R11, R17, R23, R29, R35, R41, R50
3
RC0402JR-07470RL
470R
YAGEO (VA)
R4, R5, R49
1
RC0402JR-07470RL
390K
YAGEO (VA)
R6
12
RC0603FR-07680RL
680R
YAGEO (VA)
R7, R9, R13, R15, R19, R21, R25, R27 +4
6
RC0603FR-07120RL
120R
YAGEO (VA)
R8, R14, R20, R26, R32, R38
6
RC0402JR-0710KP
10K
YAGEO (VA)
R43, R44, R45, R46, R47, R48

Lux hub design files

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

Lux hub: common questions

What microcontroller does the Lux hub use?

The Lux hub is built around the STM32F042C6T6, from the STM32 family.

How big is the Lux hub PCB?

The Lux hub measures 105.4 × 52.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Lux hub?

95 components, from 32 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 Lux hub design files?

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

Can I use the Lux hub design in my own project?

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

Can I test firmware for the Lux hub 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.

More boards in lux

Similar boards