HardLabs

Secukey

Eladji·secukey

Secukey PCB layout, top view — open source RP2040/RP2350 board by Eladji

About the Secukey PCB

Secukey is an open source RP2040/RP2350 PCB design by Eladji, published on GitHub. It is a 2-layer board measuring 29 × 49 mm, with 44 components from 19 distinct parts.

Its main chip is the RP2350A, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223, W25Q128JVS, ABM8-272-T3, SM03B-SRSS-TB(LF)(SN) and ATECC608A-MAHDA-T. By type, the board carries 21 capacitors, 12 resistors, 6 ICs, 3 switches and 1 inductor.

From the project

a yubikey like pcb design

Main components on the Secukey

RP2350ANCP1117-3.3_SOT223W25Q128JVSABM8-272-T3SM03B-SRSS-TB(LF)(SN)ATECC608A-MAHDA-T

Secukey bill of materials (BOM)

44 components, 19 distinct parts.

QtyPartRefs
1
RP2350A
U2
1
NCP1117-3.3_SOT223
U3
1
W25Q128JVS
U4
1
ABM8-272-T3
ABM8-272-T3_C20625731
ABRACON
U5
1
SM03B-SRSS-TB(LF)(SN)
SM03B-SRSS-TB
JST
U6
1
ATECC608A-MAHDA-T
MICROCHIP(美国微芯)
U7
3
TS-1185-W-4P-H1.8-160
CAX(创都)
SW4, SW5, SW6
1
USB-05
SOFNG(硕方)
USB1
1
3.3u
L1
2
FCC0805N150J500BT
FOJAN(富捷)
C1, C2
3
CL21A475KBQNNNE
SAMSUNG(三星)
C4, C5, C6
16
CC0402KRX7R5BB104
YAGEO(国巨)
C22, C23, C24, C25, C26, C27, C28, C29 +8
1
RC0805JR-0710KL
YAGEO(国巨)
R1
1
0805W8J0330T5E
UNI-ROYAL(厚声)
R2
2
0805W8F4701T5E
UNI-ROYAL(厚声)
R3, R9
2
DNF
R4, R5
2
FRC0805F27R0TS
FOJAN(富捷)
R6, R8
1
0805W8F0000T5E
UNI-ROYAL(厚声)
R7
3
RC0805JR-071KL
YAGEO(国巨)
R10, R13, R14

Secukey design files

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

Secukey: common questions

What microcontroller does the Secukey use?

The Secukey is built around the RP2350A, from the RP2040/RP2350 family.

How big is the Secukey PCB?

The Secukey measures 29 × 49 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Secukey?

44 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the Secukey design files?

From the Eladji/secukey repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Secukey design in my own project?

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

Can I test firmware for the Secukey without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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