HardLabs

PDU

OpenSkyHawk·OpenSkyhawk·PCB/Base/Power/PDU/PDU.kicad_pcb

PDU PCB layout, top view — open source STM32 board by OpenSkyHawk
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About the PDU PCB

PDU is an open source STM32 PCB design by OpenSkyHawk, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 96.6 × 63.9 mm, with 67 components from 36 distinct parts.

Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the INA180A2, AMS1117-3.3 and SN65HVD230. By type, the board carries 22 capacitors, 20 resistors, 7 diodes, 6 connectors, 5 ICs and 2 fuses.

From the project

DCS A-4E Skyhawk home cockpit — 3D-printed panels, custom PCBs, STM32/RP2040 firmware

Physical DCS A-4E Skyhawk home cockpit — 3D-printed panels, custom PCBs, and STM32 firmware for the DCS A-4E Community Mod. Controllers communicate over CAN bus.

Each physical panel group is driven by one STM32F103CBT6 MCU board. Boards communicate over CAN bus via Molex Mini-Fit Jr connectors. Panel breakout boards connect to their MCU board via 6- or 8-pin JST-XH harnesses. Firmware is built with PlatformIO.

Main components on the PDU

INA180A2AMS1117-3.3SN65HVD230STM32F103C8Tx

PDU bill of materials (BOM)

67 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
INA180A2
U1, U2
1
AMS1117-3.3
U3
1
SN65HVD230
U4
1
STM32F103C8Tx
U5
1
8MHz
Y1
1
J_PSU_IN
J1
1
J_BUS_OUT
J2
1
J_BUS_IN
J3
1
J_SWD
J4
1
J_CAN_TERM
J5
1
J_DIAG
J6
1
5A
F1
1
2A
F2
1
10k
R_BOOT1
1
RESET
SW1
1
Thermistor_NTC
TH1
1
SMBJ12A
D1
1
SMBJ6.0A
D2
4
GREEN
D3, D4, D5, D7
1
RED
D6
Show 16 more
QtyPartRefs
1
FerriteBead_Small
FB1
16
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +8
1
22uF
C9
1
10uF
C10
1
22uF
C11
1
1uF
C19
2
22pF
C21, C22
2
10m
R1, R2
4
10k
R3, R5, R6, R20
1
33k
R4
1
13k
R7
8
1k
R8, R9, R10, R11, R12, R15, R16, R17
1
4.7k
R13
1
1.5k
R14
1
33
R18
1
120
R19

PDU design files

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

PDU: common questions

What microcontroller does the PDU use?

The PDU is built around the STM32F103C8Tx, from the STM32 family.

How big is the PDU PCB?

The PDU measures 96.6 × 63.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PDU?

67 components, from 36 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 PDU design files?

From the OpenSkyHawk/OpenSkyhawk 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 PDU design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the PDU 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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