HardLabs

PyKey40 Lite

rgoulter·keyboard-labs·pcb/keyboard-pykey40-lite.kicad_pcb

PyKey40 Lite PCB layout, top view — open source RP2040/RP2350 board by rgoulter
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About the PyKey40 Lite PCB

PyKey40 Lite is an open source RP2040/RP2350 PCB design by rgoulter, published on GitHub. It is a 2-layer board measuring 227 × 77 mm, with 130 components from 20 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS, USBLC6-2SC6 and AMS1117-3.3. By type, the board carries 16 capacitors, 9 resistors, 4 ICs, 2 connectors, 2 diodes and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

Repo with my PCB designs and keyboard firmware

This repository contains the source files for keyboard designs and keyboard firmware.

Plotted gerber files can be found under the GitHub repository's releases.

Assembled PCBs for selected designs are available on the RGoulter's Keyboard Labs store.

- PCB smaller than 100x100 mm2, so that it's cheaper to fabricate at various PCB fabricators. - Reversible PCB (use the same PCB for left/right halves). - Using the WeAct Studio MiniF4 "black pill" dev board, a cheap STM32F4 dev board that runs ARM. - Low profile (PCB + choc switches + bumpons). - Column-staggered arrangement of key switches. -…

PyKey40 Lite, from the project README
From the project README

Main components on the PyKey40 Lite

RP2040W25Q128JVSUSBLC6-2SC6AMS1117-3.3

PyKey40 Lite bill of materials (BOM)

130 components, 20 distinct parts.

QtyPartRefs
1
RP2040
U1
1
W25Q128JVS
U2
1
USBLC6-2SC6
U3
1
AMS1117-3.3
U4
1
12MHz
Y1
1
USB Type-C Female 16P
J1
1
Conn_01x03
J2
2
SW_SPST
BOOT1, RST1
47
1N4148
D_1_1, D_1_2, D_1_3, D_1_4, D_1_5, D_1_6, D_1_7, D_1_8 +39
46
MX-compatible or Kailh Choc v1
SW_1_1, SW_1_2, SW_1_3, SW_1_4, SW_1_5, SW_1_6, SW_1_7, SW_1_8 +38
1
MX-compatible or Kailh Choc v1
SW_4_6
2
RED
D1, D2
10
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +2
2
1uF
C10, C11
2
22pF
C12, C13
2
22uF
C15, C16
3
5.1k
R1, R2, R9
2
22R
R3, R4
3
1k
R5, R7, R8
1
DNP
R6

PyKey40 Lite design files

The KiCad project lives in the rgoulter/keyboard-labs repository on GitHub; these links point at the commit this page was built from.

PyKey40 Lite: common questions

What microcontroller does the PyKey40 Lite use?

The PyKey40 Lite is built around the RP2040, from the RP2040/RP2350 family.

How big is the PyKey40 Lite PCB?

The PyKey40 Lite measures 227 × 77 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PyKey40 Lite?

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

Where can I download the PyKey40 Lite design files?

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

Can I use the PyKey40 Lite design in my own project?

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

Can I test firmware for the PyKey40 Lite 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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