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2 layers16 × 45 mmKeypie, the printed circuit board in 3D

Keypie

opticaldrive/keypie

keypie

Open in PCBKitView on GitHub.kicad_pcb
Size
16 × 45 mm
Copper layers
2
Thickness
1.6 mm
Parts
36
Nets
60
Pads
190
Tracks, vias
404, 60
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
18 Jul 2025
Updated
10 Jan 2026

Overview

Keypie is an open-source printed circuit board by opticaldrive, from the opticaldrive/keypie repository on GitHub, published under the MIT licence. It is a 2-layer board of 16 × 45 mm with 36 parts on 60 nets, routed with 404 tracks and 60 vias.

It is built around the RP2040, W25Q64JVXGIQ and SPX3819M5-L-3-3. Its parts include 17 capacitors, 11 resistors, 5 ICs, 2 connectors and 1 switch. It belongs with the RP2040 boards of this library.

Main components

3

README

README.md

keypie

A custom RP2040 board with two USBC ports and two flash chips. add magic sauce here

Can be used as a badUSB or to investigate USB connections(limited)

Firmware: https://circuitpython.org/board/raspberry_pi_pico/

https://github.com/earlephilhower/arduino-pico

The second USBC port is made to work with RP2040's PIO using adafruit's tinyUSB libraries image of keylogger rp2040 pcb pcb wiring - routing schematic of pcb

Parts

36
QtyValueFootprintReferences
11100nFCapacitor_SMD:C_0402_1005MetricC3, C4, C7, C8, C11, C12, C13, C14, C15, C16, C17
41uFCapacitor_SMD:C_0402_1005MetricC1, C2, C9, C10
422Capacitor_SMD:C_0402_1005MetricR8, R9, R10, R11
215pFCapacitor_SMD:C_0402_1005MetricC5, C6
21kCapacitor_SMD:C_0402_1005MetricR1, R7
25.1kCapacitor_SMD:C_0402_1005MetricR2, R3
256kCapacitor_SMD:C_0402_1005MetricR5, R6
2USB_C_Receptacle_USB2.0_14PConnector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12J1, J2
2W25Q64JVXGIQeasyeda2kicad:XSON-8_L4.0-W4.0-P0.80-TL-EPU2, U3
10ohmsCapacitor_SMD:C_0402_1005MetricR4
1ABM8-272-T3_C20625731easyeda2kicad:CRYSTAL-SMD_4P-L3.2-W2.5-BLU4
1RP2040Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mmU5
1SPX3819M5-L-3-3easyeda2kicad:SOT-23-5_L3.0-W1.6-P0.95-LS2.8-BRU1
1SW_Pusheasyeda2kicad:SW-SMD_L3.9-W3.0-P4.45SW1

Questions

How big is the Keypie PCB?

It measures 16 × 45 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Keypie use?

36 parts, built around the RP2040, W25Q64JVXGIQ and SPX3819M5-L-3-3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Keypie KiCad files?

From the opticaldrive/keypie repository on GitHub, at the commit this page was made from: the board is keypie/keypie.kicad_pcb and its schematic keypie/keypie.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Keypie design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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