HardLabs

Openlager

d-ronin·openlager·hardware/openLager.kicad_pcb

Openlager PCB layout, top view — open source STM32 board by d-ronin

About the Openlager PCB

Openlager is an open source STM32 PCB design by d-ronin, published on GitHub. It is a 4-layer board measuring 15.2 × 19.1 mm, with 29 components from 17 distinct parts.

Its main chip is the STM32F411CEU6, from the STM32 family. Other key parts include the SPX3819M5-L-3-3. By type, the board carries 12 resistors, 7 capacitors, 3 test points, 2 ICs, 2 connectors and 2 diodes.

It belongs with the robotics & motion designs in this gallery.

From the project

STM32F4 based logging dongle for HIGH RATE logging

Why do something new? To attain higher rates! The openlager hardware can accept data at high rates using slave SPI or fast async serial. It uses a 4-wide SDIO interface to the card to support higher peak logging rates. And the reasonable amount of memory buffer on the STM32F411 lets us ride out times when the SD card is busy erasing or doing other housekeeping without losing data.

Openlager, from the project README
From the project README

Main components on the Openlager

STM32F411CEU6SPX3819M5-L-3-3

Openlager bill of materials (BOM)

29 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F411CEU6
STM32F411CEUx
U1
1
SPX3819M5-L-3-3
U2
1
CSTCE8M00G15L99-R0
CSTCE8M00G15L99
Y1
1
CONN_01X06
J1
1
DM3CS-SF
J2
3
TEST_1P
TP1, TP2, TP3
1
LG L29K-F2J1-24
D1
1
LS L29K-G1J2-1-Z
D2
2
CL05A106MP5NUNC
10uF
C1, C4
3
GRM155R70J104KA01D
0.1uF
C3, C7, C8
1
GRM155R70J105MA12D
1uF
C5
1
CL05A475MQ5NQNC
4.7uF
C6
3
RC0402JR-0710KL
10k
R1, R3, R4
1
DNP
R2
4
RC0402JR-0722RL
22R
R5, R6, R7, R8
2
RC0402JR-0747KL
47k
R9, R10
2
RC0402JR-07330RL
330R
R12, R13

Openlager design files

The KiCad project lives in the d-ronin/openlager repository on GitHub; these links point at the commit this page was built from.

Openlager: common questions

What microcontroller does the Openlager use?

The Openlager is built around the STM32F411CEU6, from the STM32 family.

How big is the Openlager PCB?

The Openlager measures 15.2 × 19.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Openlager?

29 components, from 17 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 Openlager design files?

From the d-ronin/openlager repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Openlager design in my own project?

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

Can I test firmware for the Openlager 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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