HardLabs

Draco

xdandys·draco·hw/draco.kicad_pcb

Draco PCB layout, top view — open source STM32 board by xdandys

About the Draco PCB

Draco is an open source STM32 PCB design by xdandys, published on GitHub. It is a 4-layer board measuring 47.5 × 62 mm, with 173 components from 70 distinct parts.

Its main chip is the STM32F427VIT6, from the STM32 family. Other key parts include the XBEE, LTC4411, SN65HVD233, ADP3338AKCZ-3.3 and LT1761-3.3. By type, the board carries 71 resistors, 48 capacitors, 18 connectors, 13 ICs, 10 diodes and 6 transistors.

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

From the project

Flight controller powered by TauLabs

Draco is opensource HW&SW UAV flight controller board. It was primary designed for my needs, but anybody can manufacture it, use it or modify it. If you would like to own one, you can contact me.

It has two MCUs on it. The smaller one is used for OSD. The bigger one is running [TauLabs][1] flight code.

support for microSD card logging support of FrSky S.PORT telemetry protocol * micro button support

Main components on the Draco

XBEELTC4411SN65HVD233ADP3338AKCZ-3.3LT1761-3.3EL1883STM32F427VIT6STM32F303CCMS5611MICRON N25Q032A13ESC40GSN74AHC1G86MAX4090MPU-9250

Draco bill of materials (BOM)

173 components, 70 distinct parts.

QtyPartRefs
1
XBEE
U1
1
LTC4411
U2
1
SN65HVD233
U3
1
ADP3338AKCZ-3.3
U4
1
LT1761-3.3
U5
1
EL1883
U6
1
STM32F427VIT6
U7
1
STM32F303CC
U8
1
MS5611
U9
1
MICRON N25Q032A13ESC40G
U10
1
SN74AHC1G86
U11
1
MAX4090
U12
1
MPU-9250
U13
1
NTA4153NT1G
Q2
1
NTA4151PT1G
Q3
4
PDTC114EE
Q4, Q5, Q6, Q7
2
8MHz
X1, X2
1
CONN_13X3
P1
6
CONN_4
P2, P3, P5, P7, P8, P9
1
MICROUSB
P4
Show 50 more
QtyPartRefs
2
CONN_6
P6, P13
1
MICROSD
P10
1
CONN_9
P11
1
CONN_2
P12
1
CONN_2
P14
4
CONN_1
P19, P20, P21, P22
2
DUMMY
G1, G3
1
STG719
SW1
1
EVQP7A01K
SW2
1
PMEG6010CEH
D1
1
LED_RED
D2
1
LED_ORANGE
D3
1
LED_BLUE
D4
1
LED_GREEN
D5
1
LED_BLUE_F4
D6
1
LED_RED_F4
D7
1
CD0603-S01575
D8
1
MBRS130T3G
D9
1
1SMB7.0AT3G
D10
1
10uH
L1
28
100nF
C1, C3, C5, C7, C8, C10, C12, C14 +20
3
4.7uF
C2, C4, C32
3
10uF
C6, C13, C27
1
1uF
C9
2
10nF
C11, C49
1
22uF
C16
1
56nF
C18
2
2.2uF
C20, C22
4
18pF
C25, C26, C38, C39
1
1uF
C31
1
4.7uF
C37
1
510pF
C44
27
470R
R1, R2, R3, R4, R5, R6, R7, R8 +19
2
22R
R15, R16
1
120R
R17
13
39k
R18, R19, R20, R21, R24, R29, R30, R56 +5
1
82k
R22
1
12k
R23
6
220R
R27, R28, R31, R32, R53, R60
4
39k
R34, R36, R37, R38
1
1M
R35
1
681k
R39
2
4.7k
R40, R41
3
4k7
R44, R58, R59
3
330R
R45, R47, R55
1
180R
R52
1
100R
R54
2
75R
R68, R69
1
390R
R70
1
620R
R71

Draco design files

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

Draco: common questions

What microcontroller does the Draco use?

The Draco is built around the STM32F427VIT6, from the STM32 family.

How big is the Draco PCB?

The Draco measures 47.5 × 62 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Draco?

173 components, from 70 distinct parts. The full bill of materials is listed on this page.

Where can I download the Draco design files?

From the xdandys/draco repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Draco design in my own project?

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

Can I test firmware for the Draco 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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