HardLabs

Ferret

fullyautomated·ferret

Ferret PCB layout, top view — open source STM32 board by fullyautomated
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About the Ferret PCB

Ferret is an open source STM32 PCB design by fullyautomated, published on GitHub. It is a 4-layer board measuring 50 × 50 mm, with 116 components from 64 distinct parts.

Its main chip is the STM32F072CBTx, from the STM32 family. Other key parts include the TPD6S300A, FUSB307BMPX, FSUSB42MUX, TPS560430X3F and BQ25792. By type, the board carries 46 capacitors, 28 resistors, 16 diodes, 8 ICs, 8 connectors and 3 transistors.

It belongs with the power & battery and iot & wireless designs in this gallery.

From the project

Fully Automated line of USB-C PD PPS boards

USB-C Programmable Power Supply Source and Sink.

Back side optimized for JLCSMT, front for hand placing.

Ecosystem Idea: - Stackable Ferrets; you can have any\* amount of type C ports you can possibly need. Ferrets can have individual legacy electricity I/O, or can be tied to a single common bus. With the - Configuration Board (top position only) you can monitor power flow and change port settings (source/sink, current and voltage) - this has a management interface (USB UART) and maybe Bluetooth/Wifi with an ESP32. Energy is stored in the - Battery Board; 4s BMS which can be attached to the…

Ferret, from the project README
From the project README

Main components on the Ferret

TPD6S300AFUSB307BMPXFSUSB42MUXTPS560430X3FBQ25792STM32F072CBTxCH340GSP3485EN

Ferret bill of materials (BOM)

116 components, 64 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPD6S300A
U201
1
FUSB307BMPX
U202
1
FSUSB42MUX
U203
1
TPS560430X3F
U301
1
BQ25792
U302
1
STM32F072CBTx
U401
1
CH340G
U402
1
SP3485EN
U403
2
40V
Q201, Q203
1
40V
Q202
2
12MHz
Y401, Y402
1
Power
J201
2
BAT
J301, J302
1
SYS
J304
1
CTRL
J401
1
CHG
J402
1
SOICbite
J403
1
RS485
J404
1
Dead Battery
SW201
1
USER
SW401
Show 44 more
QtyPartRefs
1
RESET
SW402
2
5V6
D201, D203
2
3V3
D202, D204
1
5V
D205
1
10V
D206
1
Red
D301
1
20V
D401
1
30V
D402
2
5V
D403, D404
1
B1
D405
1
P1
D407
1
W
D408
1
P2
D409
1
B2
D410
1
12uH
L301
1
1uH
L302
7
100nF
C201, C206, C302, C310, C311, C315, C319
1
1nF
C202
3
1uF
C203, C204, C205
9
100nF
C207, C306, C312, C318, C406, C408, C410, C411 +1
1
2.2uF
C301
1
22uF
C303
12
10uF
C304, C305, C313, C314, C316, C317, C320, C321 +4
2
47nF
C307, C308
2
4.7uF
C309, C409
4
12pF
C401, C402, C403, C404
2
10nF
C405, C414
2
1uF
C407, C413
1
100
R201
1
1k
R202
1
100k
R203
11
10k
R204, R205, R207, R208, R305, R310, R401, R402 +3
1
10k
R206
1
120k
R301
1
100k
R302
1
5.1k
R303
1
30k
R304
1
2.2k
R306
1
5.6k
R307
1
470
R308
2
100
R309, R407
2
4.7k
R404, R405
1
470
R406
1
470
R408

Ferret design files

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

Ferret: common questions

What microcontroller does the Ferret use?

The Ferret is built around the STM32F072CBTx, from the STM32 family.

How big is the Ferret PCB?

The Ferret measures 50 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Ferret?

116 components, from 64 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 Ferret design files?

From the fullyautomated/ferret repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Ferret design in my own project?

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

Can I test firmware for the Ferret 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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