HardLabs

KeyGridBadge

dczia·Defcon26-Badge·Hardware/KeyGridBadge/KeyGridBadge.kicad_pcb

KeyGridBadge PCB layout, top view — open source ESP32 board by dczia

About the KeyGridBadge PCB

KeyGridBadge is an open source ESP32 PCB design by dczia, published on GitHub under the Unlicense license. It is a 2-layer board measuring 79.1 × 129 mm, with 94 components from 30 distinct parts.

Its main chip is the ESP32-WROOM, from the ESP32 family. Other key parts include the SHITTY_ADDON, TPS73233DBVT, FT231XS, SAINTCON-Minibadge and CHERRY_SK6812. By type, the board carries 30 capacitors, 23 ICs, 18 diodes, 14 resistors, 5 connectors and 2 transistors.

It belongs with the iot & wireless, wearables and displays & leds designs in this gallery.

From the project

DCZia DEFCON 26 KeyGrid Badge - 2018

News September 2021 Added new pre built binary file of the badge firmware with bug fixes for the boot loop issue. (Thanks to Aask for the guidance!) Updated final software readme and this readme.

August 2018 FINAL INO is up use that for use with the final board. ProtoDos is frozen for now. Library changes + board layout changes mean Final and Dos aren't really interchangable.

Main components on the KeyGridBadge

SHITTY_ADDONTPS73233DBVTFT231XSSAINTCON-MinibadgeESP32-WROOMCHERRY_SK6812TPS613222ADBVR

KeyGridBadge bill of materials (BOM)

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

QtyPartRefs
2
SHITTY_ADDON
U1, U2
1
TPS73233DBVT
U3
1
FT231XS
U4
1
SAINTCON-Minibadge
U5
1
ESP32-WROOM
U6
16
CHERRY_SK6812
U7, U8, U9, U10, U11, U12, U13, U14 +8
1
TPS613222ADBVR
U23
1
MBT3904DW1
Q1
1
305030026
FDN360P
Q2
1
320010003
USB_B_Micro
J1
1
Conn_01x04
J2
1
320090008
Micro_SD_Card_SPI
J3
1
OLED LCD
J6
1
Audio
J7
1
SW_SPDT
SW17
2
304020034
D_Schottky
D1, D33
16
304020034
D_ALT
D17, D18, D19, D20, D21, D22, D23, D24 +8
1
4.7uH
L1
23
302010165
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +15
1
0.1uF
C17
Show 10 more
QtyPartRefs
2
302010007
47pF
C18, C19
1
302010158
10uF
C21
1
302010165
22uF
C25
1
120pF
C29
1
302010171
22uF
C30
2
4.7k
R1, R2
2
301012162
27R
R3, R4
4
301010319
100R
R5, R6, R7, R8
5
301012152
10k
R9, R10, R11, R12, R13
1
5R
R14

KeyGridBadge design files

The KiCad project lives in the dczia/Defcon26-Badge repository on GitHub; these links point at the commit this page was built from.

KeyGridBadge: common questions

What microcontroller does the KeyGridBadge use?

The KeyGridBadge is built around the ESP32-WROOM, from the ESP32 family.

How big is the KeyGridBadge PCB?

The KeyGridBadge measures 79.1 × 129 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KeyGridBadge?

94 components, from 30 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 KeyGridBadge design files?

From the dczia/Defcon26-Badge repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the KeyGridBadge design in my own project?

Yes, under the terms of its Unlicense license, which dczia chose for the repository.

Can I test firmware for the KeyGridBadge without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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