HardLabs

Chickenstick

npgo22·APRL-Electrical·misc/chickensticks/chickensticks.kicad_pcb

Chickenstick PCB layout, top view — open source STM32 board by npgo22

About the Chickenstick PCB

Chickenstick is an open source STM32 PCB design by npgo22, published on GitHub. It is a 4-layer board measuring 42 × 100 mm, with 96 components from 53 distinct parts.

Its main chip is the STM32L433CCTx, from the STM32 family. Other key parts include the USBLC6-2SC6, TJA1042T-3, LR2021IMLTRT, LP5907MFX-3.3 and MCP73831-2-MC. By type, the board carries 32 capacitors, 20 resistors, 11 diodes, 10 connectors, 7 ICs and 6 inductors.

From the project

PCBs for APRL electrical

The projects here rely on APRLLIBS and KICADUSERTEMPLATEDIR being set. You can do this by:

1. Going to Preferences > Configure Paths... 2. Setting APRLLIBS to wherever you cloned this repo + /kicadlibs. 3. Setting KICADUSERTEMPLATEDIR to whatever you set in (2) + /templates

The ALI itself can continue to be used for years to come and this reworking of the electronics will not impact it at all. This is going to be its own separate electrical box altogether. The ALI has the following additional limitations, too: 1. Limited I/O 2. Bonded grounds between +24/12/5V power supplies 3. Unknown…

Chickenstick, from the project README
From the project README

Main components on the Chickenstick

USBLC6-2SC6STM32L433CCTxTJA1042T-3LR2021IMLTRTLP5907MFX-3.3MCP73831-2-MCBQ29700

Chickenstick bill of materials (BOM)

96 components, 53 distinct parts.

QtyPartRefs
1
USBLC6-2SC6
U1
1
STM32L433CCTx
U2
1
TJA1042T-3
U3
1
LR2021IMLTRT
U4
1
LP5907MFX-3.3
U5
1
MCP73831-2-MC
U6
1
BQ29700
U7
1
Si2371EDS
Q1
1
DMG9926UDM
Q2
1
2N7002
Q3
1
25 MHz
Y1
1
TG2520SMN 32.0000M-MCGNNM0
Y2
1
Conn_01x05_Pin
J1
1
HRO_TYPE-C-31-M-12
J2
3
Conn_01x04
J3, J6, J7
2
Conn_01x06
J4, J5
1
S02-25200300
J8
1
SMA
J9
1
Conn_01x03_Pin
J10
1
18650
BT1
Show 33 more
QtyPartRefs
1
MLT-7525
BZ1
1
500mA
F1
1
250mA
F2
1
SKRPANE010
SW1
2
MM3Z10VT1G
D1, D5
9
LED_Small
D2, D3, D4, D6, D7, D8, D9, D10 +1
1
7.5nH
L1
1
3.9nH
L2
1
4.7nH
L3
1
12nH
L4
1
22nH
L5
1
24nH
L6
3
1uF
C1, C13, C15
8
100nF
C2, C3, C4, C5, C6, C14, C25, C32
3
100n
C7, C10, C11
2
10pF
C8, C9
1
2.2uF
C12
2
1.8pF
C16, C18
1
22pF
C17
1
3.9pF
C19
1
7.5pF
C20
1
47pF
C21
1
1nF
C22
1
18pF
C23
1
2.2pF
C24
6
22uF
C26, C27, C28, C29, C30, C31
2
5.1k
R1, R2
12
10k
R3, R4, R5, R6, R7, R8, R9, R10 +4
2
100R
R13, R20
1
100k
R14
1
330R
R16
1
2k
R17
1
2.2k
R18

Chickenstick design files

The KiCad project lives in the npgo22/APRL-Electrical repository on GitHub; these links point at the commit this page was built from.

Chickenstick: common questions

What microcontroller does the Chickenstick use?

The Chickenstick is built around the STM32L433CCTx, from the STM32 family.

How big is the Chickenstick PCB?

The Chickenstick measures 42 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Chickenstick?

96 components, from 53 distinct parts. The full bill of materials is listed on this page.

Where can I download the Chickenstick design files?

From the npgo22/APRL-Electrical repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Chickenstick design in my own project?

The repository has no license, so all rights stay with npgo22. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Chickenstick 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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