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Rosmo ESC

rosmo-robot·Rosmo_ESC

Rosmo ESC PCB layout, top view — open source STM32 board by rosmo-robot
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About the Rosmo ESC PCB

Rosmo ESC is an open source STM32 PCB design by rosmo-robot, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 50 × 50 mm, with 105 components from 41 distinct parts.

Its main chip is the STM32G491MET6, from the STM32 family. Other key parts include the PRTR5V0U2F, MPS6540H and MIC5524-3.3YMT-T5. By type, the board carries 46 capacitors, 34 resistors, 10 connectors, 6 diodes, 5 ICs and 1 transistor.

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

From the project

Dual brushless motor ESC in #M5Stack module format

Design for Rosmo ESC - in M5Stack format.

Dual brushless motor ESC in M5-Stack module format Drives 2x 3-phase BLDC motors with up to 40V and 5A (cooling needed - to be tested) 2x SPI sensors supported, such as MA732, MA730, AS5048A, AS5047, etc... Control inputs via SPI, I2C (and GPIO:question:) * Grove port for I2C input/output

:warning: In development, prototype boards on order.

Rosmo ESC, from the project README
From the project README

Main components on the Rosmo ESC

STM32G491MET6PRTR5V0U2FMPS6540HMIC5524-3.3YMT-T5

Rosmo ESC bill of materials (BOM)

105 components, 41 distinct parts.

QtyPartRefs
1
STM32G491MET6
U1
1
PRTR5V0U2F
U2
2
MPS6540H
U3, U4
1
MIC5524-3.3YMT-T5
U5
1
BC847BTT1G
Q1
1
25MHz
X1
1
M-BUS
J1
1
USB_C_Receptacle_USB2.0
J2
1
Conn_01x04_MountingPin
J3
2
Conn_02x05
J4, J10
2
JST_SH_SM06B-SRSS-TB_1x06-1MP
J5, J6
2
Conn_01x03
J7, J8
1
Conn_01x02
J9
1
M-BUS
JB1
1
PMEG40T10ER
D1
2
green
D2, D3
1
SK6805
D4
1
SC1333-01ETG
D5
1
2.84V
D6
1
40Ω@100Mhz
FB1
Show 21 more
QtyPartRefs
9
100nF 6.3V
C1, C3, C4, C5, C6, C7, C8, C12 +1
1
10pF 6.3V 5%
C2
2
47pF 10V
C9, C10
1
10nF 10V
C11
1
100nF 50V 5%
C13
2
10nF 75V
C14, C19
4
100nF 75V
C15, C17, C20, C22
2
1uF 16V
C16, C21
2
4.7uF 16V
C18, C23
20
10uF 50V
C25, C26, C27, C28, C29, C30, C31, C32 +12
2
2.2uF 16V
C45, C46
4
2k2
R1, R2, R32, R33
8
5k1
R3, R4, R8, R9, R10, R11, R14, R34
2
27R
R5, R6
1
4k7
R7
1
47k 1%
R12
3
10k
R13, R18, R25
1
300R
R15
1
2.2k 1%
R16
1
200Ω
R17
12
2k2 0.5%
R19, R20, R21, R22, R23, R24, R26, R27 +4

Rosmo ESC design files

The KiCad project lives in the rosmo-robot/Rosmo_ESC repository on GitHub; these links point at the commit this page was built from.

Rosmo ESC: common questions

What microcontroller does the Rosmo ESC use?

The Rosmo ESC is built around the STM32G491MET6, from the STM32 family.

How big is the Rosmo ESC PCB?

The Rosmo ESC measures 50 × 50 mm, has 4 copper layers and is 1.72 mm thick.

How many components are on the Rosmo ESC?

105 components, from 41 distinct parts. The full bill of materials is listed on this page.

Where can I download the Rosmo ESC design files?

From the rosmo-robot/Rosmo_ESC repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Rosmo ESC design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which rosmo-robot chose for the repository.

Can I test firmware for the Rosmo ESC 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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