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RP2040 minimal r2

LastZactionHero·defcon-silent-disco

RP2040 minimal r2 PCB layout, top view — open source RP2040/RP2350 board by LastZactionHero

About the RP2040 minimal r2 PCB

RP2040 minimal r2 is an open source RP2040/RP2350 PCB design by LastZactionHero, published on GitHub under the MIT license. It is a 2-layer board measuring 52 × 51 mm, with 30 components from 15 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223 and W25Q16JVUXIQ. By type, the board carries 17 capacitors, 5 resistors, 4 connectors, 3 ICs and 1 crystal.

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

From the project

RP2040-based DEF CON silent disco badge — KiCad project + tooling

A wearable silent disco. Every badge plays DJ mixes from its own memory card to your headphones, runs a light show that matches the music, and can sync to a friend's badge over infrared — same song, same moment, lights flashing together.

1. Flip the power switch. Plug headphones into the top jack. 2. It starts playing where it last left off.

Syncing: press SYNC — your music pauses and the badge listens for up to ~25 seconds. Touch your badge's jagged edge into your friend's (they interlock — that's what the teeth are for) and it will pick up their broadcast, jump to their channel at their…

RP2040 minimal r2, from the project README
From the project README

Main components on the RP2040 minimal r2

NCP1117-3.3_SOT223W25Q16JVUXIQRP2040

RP2040 minimal r2 bill of materials (BOM)

30 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NCP1117-3.3_SOT223
U1
1
W25Q16JVUXIQ
W25Q128JVS
U2
1
RP2040
U3
1
ABM8-272-T3
Y1
1
USB_B_Micro
J1
1
Conn_01x02
J2
2
Conn_02x18_Odd_Even
J3, J4
3
10U
10u
C1, C4, C17
2
15P
15p
C2, C3
8
CL05B104KO5NNNC
100n
C5, C6, C7, C9, C11, C12, C14, C16
2
CL05A105KP5NNNC
1u
C8, C10
2
100n
C13, C15
2
1k
R1, R5
1
DNF
R2
2
27
R3, R4

RP2040 minimal r2 design files

The KiCad project lives in the LastZactionHero/defcon-silent-disco repository on GitHub; these links point at the commit this page was built from.

RP2040 minimal r2: common questions

What microcontroller does the RP2040 minimal r2 use?

The RP2040 minimal r2 is built around the RP2040, from the RP2040/RP2350 family.

How big is the RP2040 minimal r2 PCB?

The RP2040 minimal r2 measures 52 × 51 mm, has 2 copper layers and is 1 mm thick.

How many components are on the RP2040 minimal r2?

30 components, from 15 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 minimal r2 design files?

From the LastZactionHero/defcon-silent-disco 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 minimal r2 design in my own project?

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

Can I test firmware for the RP2040 minimal r2 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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