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Atmos fc

cypamigon·atmos_fc·hardware/atmos_fc/atmos_fc.kicad_pcb

Atmos fc PCB layout, top view — open source STM32 board by cypamigon
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About the Atmos fc PCB

Atmos fc is an open source STM32 PCB design by cypamigon, published on GitHub under the MIT license. It is a 4-layer board measuring 40 × 40 mm, with 101 components from 45 distinct parts.

Its main chip is the STM32G473CEU6, from the STM32 family. Other key parts include the MAX25232ATCD_V+, TPS78533BQWDRBRQ1, MAX7456EUI+, ICM-42688-P and W25Q256JVEIQ. By type, the board carries 40 resistors, 36 capacitors, 8 ICs, 8 diodes, 3 connectors and 2 crystals.

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

From the project

Drone flight controller based on STM32G4 with IMU (ICM-468-P), barometer (DPS-386), OSD (MAX7456) and 32MB flash memory for blackbox logging — running Betaflight.

AtmosFC is an open-hardware quadcopter flight controller designed in KiCad. Powered by an STM32G4 MCU, it integrates high-performance sensors and peripherals, and is fully compatible with Betaflight (≥ 4.5).

- MCU: STM32G473CEU6 - IMU: ICM-468-P - Barometer: DPS-386 - OSD: MAX7456 for analog on-screen display - Blackbox: 32MB onboard flash memory for log recording - Power input: Up to 6S - Power monitoring: Battery voltage and current sensing - Status indicators: Green, Blue, and Amber LEDs - Dimensions: 40x40mm - Mounting holes: 30.5×30.5 mm (M4 holes for silicone inserts with M3 screws) -…

Atmos fc, from the project README
From the project README

Main components on the Atmos fc

MAX25232ATCD_V+TPS78533BQWDRBRQ1STM32G473CEU6MAX7456EUI+ICM-42688-PW25Q256JVEIQDPS368XTSA1USBLC6-2P6

Atmos fc bill of materials (BOM)

101 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MAX25232ATCD_V+
MAX25232
Analog Devices
U1
1
TPS78533BQWDRBRQ1
TPS78533BQDRBRQ1
Texas Instruments
U2
1
STM32G473CEU6
STMicroelectronics
U3
1
MAX7456EUI+
MAX7456
Analog Devices
U4
1
ICM-42688-P
TDK InvenSense
U5
1
W25Q256JVEIQ
W25Q256JVE
Winbond
U6
1
DPS368XTSA1
Infineon Technologies
U7
1
USBLC6-2P6
STMicroelectronics
U8
1
BC817-40QBH-QZ
BC817
Nexperia
Q1
1
ECS-80-10-33-CGN-TR3
8MHz
ECS
Y1
1
CX2016SA27000D0GSSCC
27MHz
KYOCERA AVX
Y2
1
SM08B-SRSS-TB
JST-SH 8p
JST Sales America Inc.
J2
1
USB4105-GF-A
USB_C_Receptacle_USB2.0_16P
GCT
J3
1
Conn_01x08
J8
1
436331045822
SW_Push
Wurth Elektronik
SW1
1
PESD30VF1BBL-QYL
D_TVS
Nexperia
D1
1
V7N103HM3/I
D_Schottky
Vishay Semiconductors
D2
1
PMEG2020CPASX
Nexperia
D3
1
LO Q976-PS-25
~
ams OSRAM
D4
1
LT Q39G-Q1OO-25-1
~
ams OSRAM
D5
Show 25 more
QtyPartRefs
1
LB Q39G-N1OO-35-1
~
ams OSRAM
D6
2
SP1001-04XTG
Littlefuse
D7, D8
1
BLM15PX121BH1D
120R@100MHz
Murata Electronics
FB1
1
SRP5030CC-100M
10u
Bourns
L1
2
MCJCG31LBB7106KTPA01
10u
TAIYO YUDEN
C1, C2
18
MSASE105SB7104KFNA01
100n
TAIYO YUDEN
C3, C12, C13, C14, C15, C16, C18, C21 +10
1
MSAST168SB7105KTNA01
1u
TAIYO YUDEN
C4
4
MSASE31LBB7226MTNA01
22u
TAIYO YUDEN
C5, C6, C7, C8
4
GRM188Z71C475KE21J
4u7
Murata Electronics
C9, C10, C11, C17
2
GRM1555C1H100JA01D
10p
Murata Electronics
C19, C20
2
F981A476MSAAS1
47u
KYOCERA AVX
C25, C26
2
GRM155C71A225KE11D
2u2
Murata Electronics
C27, C28
1
GRM1555C1E103GE01D
10n
Murata Electronics
C30
1
CRCW040220K0FKED
20k
Vishay / Dale
R1
21
CRCW040220K0FKED
33R
Vishay / Dale
R2, R3, R8, R9, R11, R12, R17, R20 +13
4
CRCW040210K0FKEDC
10k
Vishay / Dale
R4, R5, R10, R18
4
CRCW040247K0FKEDC
47k
Vishay / Dale
R6, R22, R23, R24
1
CRCW04024K70FKEDC
4.7k
Vishay / Dale
R7
1
CRCW0402100RFKEDC
100R
Vishay / Dale
R13
1
CRCW0402220RFKED
220R
Vishay / Dale
R14
1
CRCW0402130RFKEDC
130R
Vishay / Dale
R15
2
CRCW040275R0FKED
75R
Vishay / Dale
R16, R19
2
CRCW04025K10FKED
5k1
Vishay / Dale
R25, R26
1
CRCW04021K00FKED
1k
Vishay / Dale
R39
1
DNP
R40

Atmos fc design files

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

Atmos fc: common questions

What microcontroller does the Atmos fc use?

The Atmos fc is built around the STM32G473CEU6, from the STM32 family.

How big is the Atmos fc PCB?

The Atmos fc measures 40 × 40 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the Atmos fc?

101 components, from 45 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 Atmos fc design files?

From the cypamigon/atmos_fc 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 Atmos fc design in my own project?

Yes, under the terms of its MIT license, which cypamigon chose for the repository.

Can I test firmware for the Atmos fc 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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