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RP2040-Guide

rompasaurus·dilder·hardware-design/reference-boards/rp2040-designguide/PCB/RP2040-Guide.kicad_pcb

RP2040-Guide PCB layout, top view — open source RP2040/RP2350 board by rompasaurus

About the RP2040-Guide PCB

RP2040-Guide is an open source RP2040/RP2350 PCB design by rompasaurus, published on GitHub. It is a 2-layer board measuring 45.2 × 93.4 mm, with 31 components from 18 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the RP2040/RP2350 family. Other key parts include the LTC3111EMSEPBF, CP2102N-A02-GQFN24 and XC6206PxxxMR-Regulator_Linear. By type, the board carries 17 capacitors, 7 resistors, 4 ICs, 1 crystal, 1 connector and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

This guide requires you to have prerequisite knowledge about PCB design and a little about the RP2040. This is not a guide for absolute beginners and should not be treated as one.

This guide requires you to have prerequisite knowledge about PCB design and a little about the RP2040. This is not a guide for absolute beginners and should not be treated as one.

I have multiple tested and working boards using the RP2040, including an open source one you can find here!

Bit of a disclaimer: I have mostly switched from RP2040 over to STM32F072 due to a few reasons. Mostly component cost and the amount of parts necessary, as well as overall stability. I have a tested and OSH f072 PCBs available on github. Namely here, here, and here. Designing with f072 is generally easier as…

RP2040-Guide, from the project README
From the project README

Main components on the RP2040-Guide

LTC3111EMSEPBFCP2102N-A02-GQFN24ESP32-S3-WROOM-1XC6206PxxxMR-Regulator_Linear

RP2040-Guide bill of materials (BOM)

31 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LTC3111EMSEPBF
W25Q128JVS
U1
1
CP2102N-A02-GQFN24
USBLC6-2SC6
U2
1
ESP32-S3-WROOM-1
RP2040
U3
1
XC6206PxxxMR-Regulator_Linear
U4
1
12MHz
Y1
1
CONN_02X05_ODD_EVEN
USB_C_Receptacle_USB2.0
J1
1
500mA
F1
7
100nF
C1, C5, C6, C10, C13, C14, C15
2
22pF
C2, C3
4
1uF
C4, C8, C16, C17
1
10uF
C7
1
22P
100nF
C9
1
1500P
100nF
C11
1
47P
100nF
C12
1
1K8
1k
R1
2
1k
R2, R7
2
5k1
R3, R4
2
27R
R5, R6

RP2040-Guide design files

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

RP2040-Guide: common questions

What microcontroller does the RP2040-Guide use?

The RP2040-Guide is built around the ESP32-S3-WROOM-1, from the RP2040/RP2350 family.

How big is the RP2040-Guide PCB?

The RP2040-Guide measures 45.2 × 93.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RP2040-Guide?

31 components, from 18 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 RP2040-Guide design files?

From the rompasaurus/dilder 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 RP2040-Guide design in my own project?

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

Can I test firmware for the RP2040-Guide 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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