Peacock

About the Peacock PCB

Peacock is an open source RP2040/RP2350 PCB design by george-norton, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 172 × 152.9 mm, with 74 components from 28 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q16JVUXIQ, MIC5323-3.3YD5-TR, mXT336UD-MAU002, SN74LVC1T45DRL and USBLC6-2P6. By type, the board carries 39 capacitors, 15 resistors, 7 ICs, 6 LEDs, 3 connectors and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A big QMK powered trackpad

Peacock is an RP2040 powered trackpad running QMK. It features an integrated Microchip MaxTouch sensor IC which is connected to a 7" capacitive sensor. I also designed some little trackpads which you can integrate into your own keyboards, see Procyon.

The Ploopy trackpad is like a more polished Peacock, with a higher resolution sensor. It runs code build from the same QMK/ZMK branches, and is easier to buy.

Peacock, from the project README — From the project README

Main components on the Peacock

RP2040 W25Q16JVUXIQ MIC5323-3.3YD5-TR mXT336UD-MAU002 SN74LVC1T45DRL USBLC6-2P6

Peacock bill of materials (BOM)

74 components, 28 distinct parts.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	W25Q16JVUXIQ	USON-8-1EP_3x2mm_P0.5mm_EP0.25x1.65mm	U2
2	MIC5323-3.3YD5-TR MIC5504-3.3YM5	SOT-23-5	U3, U5
1	mXT336UD-MAU002	QFN-56_EP_6x6_Pitch0.35mm	U4
1	SN74LVC1T45DRL	SN74LVC1T45DRLR	U6
1	USBLC6-2P6	SOT-666	U7
1	Crystal_GND24	Crystal_SMD_2520-4Pin_2.5x2.0mm	Y1
1	USB_C_Receptacle_USB2.0	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
1	~	vik-keyboard-connector-horizontal	J2
1	~	vik-module-connector-vertical	J4
1	Polyfuse	Fuse_0603_1608Metric	F1
1	SW_Push	SW_SPST_CK_KXT3	SW_BOOT1
6	SK6812-MINI-E	LED_6028R	LED1, LED2, LED3, LED4, LED5, LED6
1	B5817	D_SOD-323	D1
8	1µ	C_0402_1005Metric	C1, C4, C14, C15, C18, C22, C28, C30
18	100n	C_0402_1005Metric	C2, C3, C5, C6, C7, C8, C9, C10 +10
2	15p	C_0402_1005Metric	C12, C13
2	10nF	C_0402_1005Metric	C16, C39
1	2.2nF	C_0603_1608Metric	C17
5	22n	C_0402_1005Metric	C19, C21, C23, C25, C27

Show 8 more

Qty	Part	Footprint	Refs
3	2.2µ	C_0402_1005Metric	C20, C24, C26
4	10k	R_0402_1005Metric	R1, R11, R12, R17
2	1k	R_0402_1005Metric	R2, R3
2	5.1k	R_0402_1005Metric	R6, R7
2	27	R_0402_1005Metric	R8, R9
1	12k	R_0402_1005Metric	R10
2	3.3k	R_0402_1005Metric	R13, R14
2	330	R_0402_1005Metric	R15, R18

Peacock design files

The KiCad project lives in the george-norton/peacock repository on GitHub; these links point at the commit this page was built from.

Layouttrackpad.kicad_pcb
Schematictrackpad.kicad_sch

Peacock: common questions

What microcontroller does the Peacock use?

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

How big is the Peacock PCB?

The Peacock measures 172 × 152.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Peacock?

74 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Peacock design files?

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

Can I use the Peacock design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which george-norton chose for the repository.

Can I test firmware for the Peacock 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.