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OM-16LED

OpenModbus·OM-16LED·kicad/OM-16LED.kicad_pcb

OM-16LED PCB layout, top view — open source STM32 board by OpenModbus
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About the OM-16LED PCB

OM-16LED is an open source STM32 PCB design by OpenModbus, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 100 × 72 mm, with 98 components from 25 distinct parts.

Its main chip is the STM32G474RET6, from the STM32 family. Other key parts include the 2EDN7534BXTSA1, R-78E12-1.0/X9, R-78E3.3-0.5 and THVD1450DRBR. By type, the board carries 23 capacitors, 19 resistors, 17 fuses, 16 transistors, 12 ICs and 6 connectors.

It belongs with the iot & wireless designs in this gallery.

From the project

A compact industrial-grade 16-channel Modbus RTU LED driver.

A compact industrial-grade 16-channel Modbus RTU LED driver module featuring high-current MOSFET outputs, per-bank terminal grouping, wide load voltage range, DIN-rail support, and full configuration via Modbus holding registers. Designed for lighting automation, distributed I/O, and custom control applications.

The Open Modbus OM-16LED is a 16-channel low-side LED driver module intended for industrial automation, lighting control, and distributed I/O networks using Modbus RTU over RS-485. It switches DC LED loads such as LED strips, architectural lighting, and indicator arrays up to 60 VDC…

Main components on the OM-16LED

STM32G474RET62EDN7534BXTSA1R-78E12-1.0/X9R-78E3.3-0.5THVD1450DRBR

OM-16LED bill of materials (BOM)

98 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32G474RET6
STM32G474RETx
STMicroelectronics
U1
8
2EDN7534BXTSA1
2EDN7534B
Infineon Technologies
U2, U3, U4, U5, U6, U7, U8, U9
1
R-78E12-1.0/X9
R-78E12-1.0
RECOM
U10
1
R-78E3.3-0.5
RECOM
U11
1
THVD1450DRBR
THVD1450DR
Texas Instruments
U12
16
NTMFS4D0N08XT1G
NTMFS4D0N08X
onsemi
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +8
1
10030002303
2EDGVC-5.0-04P
DEGSON
J1
4
10030002306
2EDGVC-5.0-06P
DEGSON
J2, J3, J4, J5
1
02x03 1.27
J6
16
0679H8000-05
8A 60VDC
Bel Fuse
F1, F2, F3, F4, F5, F6, F7, F8 +8
1
0466001.NR
1A
Littelfuse
F17
1
CD123D-B140LR
Bourns
D1
1
SMAJ28A
Littelfuse
D2
1
SM712-02HTG
SM712_SOT23
Littelfuse
D3
2
LTST-C190EKT
RED
LITEON
D4, D5
8
GRT21BR71H104KE01L
0.1uF
Murata
C1, C2, C3, C4, C5, C6, C7, C8
4
GRT31CR61H106KE01L
10uF
Murata
C9, C10, C11, C12
1
GRM188R61E475KE11D
4.7uF
Murata
C13
7
GCJ188R71H104KA12D
0.1uF
Murata
C14, C15, C16, C17, C19, C22, C23
2
GRT188R61H105KE13D
1uF
Murata
C18, C21
Show 5 more
QtyPartRefs
1
GCM188R71H103KA37D
10nF
Murata
C20
16
ERJ-H3EF10R0V
10
Panasonic
R1, R2, R3, R4, R5, R6, R7, R8 +8
1
ERJ-H3EF1002V
10K
Panasonic
R17
1
ERJ-UP3J222V
2K2
Panasonic
R18
1
ERJ-UP3J471V
470
Panasonic
R19

OM-16LED design files

The KiCad project lives in the OpenModbus/OM-16LED repository on GitHub; these links point at the commit this page was built from.

OM-16LED: common questions

What microcontroller does the OM-16LED use?

The OM-16LED is built around the STM32G474RET6, from the STM32 family.

How big is the OM-16LED PCB?

The OM-16LED measures 100 × 72 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OM-16LED?

98 components, from 25 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 OM-16LED design files?

From the OpenModbus/OM-16LED 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 OM-16LED design in my own project?

Yes, under the terms of its GPL-3.0 license, which OpenModbus chose for the repository.

Can I test firmware for the OM-16LED 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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