HardLabs

Krz ducky

krzkawa·krz-ducky·pcb/krzducky.kicad_pcb

Krz ducky PCB layout, top view — open source RP2040/RP2350 board by krzkawa

About the Krz ducky PCB

Krz ducky is an open source RP2040/RP2350 PCB design by krzkawa, published on GitHub. It is a 2-layer board measuring 35.5 × 18.5 mm, with 20 components from 8 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AP2112K-3.3 and W25Q128JVS. By type, the board carries 10 capacitors, 4 resistors, 3 ICs, 1 crystal, 1 connector and 1 switch.

From the project

pcb/ — KiCad schematic and board layout files also gerber files. BOM.md — Component parts list and AliExpress links. firmware/` — CircuitPython and pico-ducky files.

pcb/ — KiCad schematic and board layout files also gerber files. BOM.md — Component parts list and AliExpress links. firmware/` — CircuitPython and pico-ducky files.

MCU: RP2040 (QFN-56) Flash: 16MB W25Q128 (SOIC-8) Power: AP2112K-3.3 LDO (5V USB to 3.3V) Passives: 0603 size for hand-soldering / hot air assembly Clock: 12MHz 3225 crystal with 18pF load capacitors Control: Manual BOOTSEL tactile switch

Main components on the Krz ducky

RP2040AP2112K-3.3W25Q128JVS

Krz ducky bill of materials (BOM)

20 components, 8 distinct parts.

QtyPartRefs
1
RP2040
U1
1
AP2112K-3.3
U2
1
W25Q128JVS
U3
1
Crystal_GND24
Y1
1
USB_A
J1
1
SW_Push
SW1
10
C
C1, C2, C3, C4, C5, C6, C7, C8 +2
4
R
R1, R2, R3, R4

Krz ducky design files

The KiCad project lives in the krzkawa/krz-ducky repository on GitHub; these links point at the commit this page was built from.

Krz ducky: common questions

What microcontroller does the Krz ducky use?

The Krz ducky is built around the RP2040, from the RP2040/RP2350 family.

How big is the Krz ducky PCB?

The Krz ducky measures 35.5 × 18.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Krz ducky?

20 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the Krz ducky design files?

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

Can I use the Krz ducky design in my own project?

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

Can I test firmware for the Krz ducky 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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