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Defcon badge

LastZactionHero·defcon-silent-disco·defcon_badge/defcon_badge.kicad_pcb

Defcon badge PCB layout, top view — open source RP2040/RP2350 board by LastZactionHero

About the Defcon badge PCB

Defcon badge is an open source RP2040/RP2350 PCB design by LastZactionHero, published on GitHub under the MIT license. It is a 4-layer board measuring 88 × 54 mm, with 76 components from 42 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the TP4056, ME6211C33M5G, TM8211, TDA1308AT and TSOP4838. By type, the board carries 31 capacitors, 23 resistors, 7 ICs, 4 connectors, 4 LEDs and 1 crystal.

It belongs with the wearables, audio and power & battery 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…

Defcon badge, from the project README
From the project README

Main components on the Defcon badge

TP4056ME6211C33M5GRP2040TM8211TDA1308ATTSOP4838

Defcon badge bill of materials (BOM)

76 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TP4056
U1
1
ME6211C33M5G
U2
1
RP2040
WM2606220057
U3
1
RP2040
U4
1
TM8211
U5
1
TDA1308AT
TDA1308
U6
1
TSOP4838
U7
1
ABM8-272-T3
Y1
1
USB4085
USB_C_Receptacle_USB2.0_16P
J1
1
S2B-PH-K-S
JST-PH 2P
J2
1
TF-PUSH-A
microSD
J3
1
SJ1-3523N
J5
4
TS-1187A-B-A-B
TS-1187A
CHANNEL1, SYNC1, VOL+1, VOL-1
1
MSK-12C02
SS-12D00
SW1
4
SK9822
LED1, LED2, LED3, LED4
1
IR15-21C/TR8
IR LED 940 nm
D1
3
CL05A105KP5NNNC
1u
C1, C3, C4
4
CL10A106KP8NNNC
10u
C2, C22, C23, C31
2
CL05B104KO5NNNC
15p
C5, C6
1
CL05B104KO5NNNC
1u
C7
Show 22 more
QtyPartRefs
1
CL05A105KP5NNNC
100nF
C8
5
CL05B104KO5NNNC
100n
C9, C11, C16, C20, C30
1
CL05A105KP5NNNC
100n
C10
2
CL05B104KO5NNNC
1u
C12, C14
3
100n
C13, C15, C18
1
10U
100n
C17
1
CL10A106KP8NNNC
10u
C21
1
10u
C24
2
220u
C25, C26
4
CL05B103KB5NNNC
10n
C27, C28, C29, C32
2
RC0402FR-075K1L
5.1k
R1, R2
1
RC0402FR-072K4L
2.4k
R3
5
RC0402FR-07100KL
100k
R4, R5, R6, R18, R19
3
RC0402FR-0710KL
10k
R7, R20, R21
2
10k
R8, R9
1
RC0402FR-075K1L
1k
R10
1
RC0402FR-075K1L
DNF
R11
1
RC0402FR-072K4L
1k
R12
2
RC0402FR-07100KL
27
R13, R14
2
RC0402FR-07100KL
10k
R15, R23
2
RC0402FR-0747KL
47k
R16, R17
1
RC0402FR-07100KL
150
R22

Defcon badge 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.

Defcon badge: common questions

What microcontroller does the Defcon badge use?

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

How big is the Defcon badge PCB?

The Defcon badge measures 88 × 54 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Defcon badge?

76 components, from 42 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 Defcon badge 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 Defcon badge 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 Defcon badge 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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