Duck

About the Duck PCB

Duck is an open source RP2040/RP2350 PCB design by CubeShifter, published on GitHub under the MIT license. It is a 4-layer board measuring 30.7 × 30.5 mm, with 47 components from 25 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the MAX98357A, W25Q128JVS, MCP73831-2-OT and NCP1117-3.3_SOT223. By type, the board carries 23 capacitors, 11 resistors, 5 ICs, 2 connectors, 2 switches and 2 diodes.

It belongs with the keyboards and audio designs in this gallery.

From the project

A little fidget toy that lets you click a keyboard switch and plays a noise.

I foget what its called(Dont mind the drc errors i forgot to rerun it)

Duck, from the project README — From the project README

Main components on the Duck

RP2040 MAX98357A W25Q128JVS MCP73831-2-OT NCP1117-3.3_SOT223

Duck bill of materials (BOM)

47 components, 25 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	MAX98357A	TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm	U2
1	W25Q128JVS	SOIC-8_5.3x5.3mm_P1.27mm	U3
1	MCP73831-2-OT	SOT-23-5	U4
1	NCP1117-3.3_SOT223	SOT-223-3_TabPin2	U5
1	Crystal_GND24	CRYSTAL-SMD_4P-L3.2-W2.5-BL	Y1
1	Conn_01x02	PinSocket_1x02_P2.54mm_Vertical	J1
1	Conn_02x01	PinSocket_1x02_P2.54mm_Vertical	J3
1	SW_Push	SW-SMD_L3.9-W3.0-P4.45	SW1
1	SW_Push	SW_Cherry_MX_1.00u_PCB	SW2
1	TYPE-C-31-M-12 韩国韩荣	USB-C_SMD-TYPE-C-31-M-12_1	USBC1
1	SK6812MINI-E	LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount	D1
1	D	D_0402_1005Metric	D3
14	0.1uF	C_0402_1005Metric	C1, C2, C3, C4, C5, C6, C7, C8 +6
2	1uF	C_0402_1005Metric	C9, C12
5	10uf	C_0603_1608Metric	C13, C14, C19, C20, C21
2	33pF	C_0402_1005Metric	C15, C16
2	27	R_0402_1005Metric	R1, R2
2	1k	R_0402_1005Metric	R5, R6
1	10k	R_0402_1005Metric	R7

Show 5 more

Qty	Part	Footprint	Refs
1	100k	R_0402_1005Metric	R8
1	1000k	R_0402_1005Metric	R9
1	330	R_0402_1005Metric	R10
1	2k	R_0402_1005Metric	R11
2	5.1k	R_0402_1005Metric	R12, R13

Duck design files

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

Duck: common questions

What microcontroller does the Duck use?

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

How big is the Duck PCB?

The Duck measures 30.7 × 30.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Duck?

47 components, from 25 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 Duck design files?

From the CubeShifter/Duck 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 Duck design in my own project?

Yes, under the terms of its MIT license, which CubeShifter chose for the repository.

Can I test firmware for the Duck 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.