HardLabs

Pendant

picafe·pendant·controller/pendant.kicad_pcb

Pendant PCB layout, top view — open source STM32 board by picafe
Simulate this board

About the Pendant PCB

Pendant is an open source STM32 PCB design by picafe, published on GitHub. It is a 4-layer board measuring 33.2 × 33.2 mm, with 45 components from 31 distinct parts.

Its main chip is the STM32C071G8U6, from the STM32 family. Other key parts include the XC6206P332MR, TPS61022, LIS2DW12TR and TP4056-42-ESOP8. By type, the board carries 13 capacitors, 13 resistors, 5 ICs, 5 connectors, 3 transistors and 3 diodes.

It belongs with the power & battery and displays & leds designs in this gallery.

From the project

A pendant built from two PCBs: a 8×8 bicolor LED matrix module (red, orange, green) and controller board with battery charging, USB-C power, 5 V boost, and motion sensing.

A pendant built from two PCBs: a 8×8 bicolor LED matrix module (red, orange, green) and controller board with battery charging, USB-C power, 5 V boost, and motion sensing.

I had already been working on a 32×8 bicolor matrix module and wanted to try the Pendant YSWS before the deadline. An example on the pendant website inspired me to make a bicolor version with an orange fire-style pattern. Fitting the full matrix and controller on one 2/4 layer board was not the most possible, so my design splits into a display PCB and a pendant controller, which are connected with 2.54mm pitch pin headers…

Pendant, from the project README
From the project README

Main components on the Pendant

XC6206P332MRSTM32C071G8U6TPS61022LIS2DW12TRTP4056-42-ESOP8

Pendant bill of materials (BOM)

45 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XC6206P332MR
Torex Semicon
U1
1
STM32C071G8U6
ST(意法半导体)
U3
1
TPS61022
U4
1
LIS2DW12TR
ST(意法半导体)
U5
1
TP4056-42-ESOP8
U6
3
BSS138W
hongjiacheng
Q1, Q2, Q3
1
CONN_01X04_SOCKET
Conn_01x04_Socket
J1
2
CONN_01X04_SOCKET
Conn_01x04_Socket
J2, J3
1
USB_C_RECEPTACLE_POWERONLY_6P
USB_C_Receptacle_PowerOnly_6P
J4
1
CONN_01X02_SOCKET
Conn_01x02_Socket
J5
1
SMD1206B150TFT
Brightking(君耀电子)
F1
1
C720477
Tactile Button, 160gf
XUNPU
S1
1
BAT54CW
D1
1
C2286
Red
Hubei KENTO Elec
D2
1
SS34
MDD（Microdiode Electronics）
D3
1
FXL0530-1R0-M
cjiang(长江微电)
L1
1
4.7UF
4.7uF
Samsung Electro-Mechanics
C1
1
100NF
100nF
Samsung Electro-Mechanics
C2
3
100NF
100nF
YAGEO
C3, C4, C7
1
1UF
1uF
Samsung Electro-Mechanics
C5
Show 11 more
QtyPartRefs
1
1UF
1uF
Samsung Electro-Mechanics
C6
1
10UF
10uF
Samsung Electro-Mechanics
C8
5
10UF
10uF
Murata Electronics
C9, C10, C11, C12, C13
1
750kΩ
UNI-ROYAL(Uniroyal Elec)
R1
2
100kΩ
UNI-ROYAL(Uniroyal Elec)
R2, R6
1
1kΩ
UNI-ROYAL(Uniroyal Elec)
R3
2
5.1kΩ
UNI-ROYAL(Uniroyal Elec)
R4, R5
1
10kΩ
UNI-ROYAL(Uniroyal Elec)
R7
4
4.7kΩ
UNI-ROYAL(Uniroyal Elec)
R8, R9, R10, R11
1
10kΩ
UNI-ROYAL(Uniroyal Elec)
R12
1
120Ω
UNI-ROYAL(Uniroyal Elec)
R13

Pendant design files

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

Pendant: common questions

What microcontroller does the Pendant use?

The Pendant is built around the STM32C071G8U6, from the STM32 family.

How big is the Pendant PCB?

The Pendant measures 33.2 × 33.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Pendant?

45 components, from 31 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 Pendant design files?

From the picafe/pendant 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 Pendant design in my own project?

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

Can I test firmware for the Pendant 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.

More boards in pendant

Similar boards