HardLabs

KRAKE

PubInv·krake·PWA_REV2/PWA_REV2.kicad_pcb

KRAKE PCB layout, top view — open source ESP32 board by PubInv

About the KRAKE PCB

KRAKE is an open source ESP32 PCB design by PubInv, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 137.2 × 83.8 mm, with 195 components from 66 distinct parts.

Its main chip is the ESP32-WROOM-32E-N4, from the ESP32 family. Other key parts include the LM7805CTG, AMS1117-3.3, PCF8574AT_3_518, https://www.ebay.com/itm/403534100457 and PZ254V-11-16P. By type, the board carries 79 resistors, 27 test points, 26 capacitors, 15 diodes, 14 transistors and 9 connectors.

It belongs with the iot & wireless and usb & debug tools designs in this gallery.

From the project

The Krake™ is a Wi-Fi–enabled server using an MQTT broker, which means it can be controlled remotely by other devices ("clients") via the internet. It can additionally be controlled by a nearby device via a wired connection using an RS-232 connector or an SPI connection.

Main components on the KRAKE

LM7805CTGESP32-WROOM-32E-N4AMS1117-3.3PCF8574AT_3_518https://www.ebay.com/itm/403534100457PZ254V-11-16PCH340BMAX3232ID

KRAKE bill of materials (BOM)

195 components, 66 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM7805CTG
LM7805_TO220
HANSCHIP semiconductor
U101
1
ESP32-WROOM-32E-N4
Espressif Systems
U102
1
AMS1117-3.3
Advanced Monolithic Systems
U103
1
PCF8574AT_3_518
NXP Semicon
U301
1
https://www.ebay.com/itm/403534100457
LCD_20x4_Character-GPAD_SCH_LIB
NA
U302
1
PZ254V-11-16P
Conn_01x16
XFCN
U303
1
CH340B
U501
1
MAX3232ID
MAX3232
Texas Instruments
U701
7
MMBT2222A-7-F
Diodes Incorporated
Q201, Q202, Q203, Q204, Q205, Q206, Q207
7
BSS138
Yangzhou Yangjie Electronic Technology Co., Ltd
Q301, Q302, Q303, Q304, Q305, Q401, Q402
1
DC-005-5A-2.0-SMT / 54-00164
Barrel_Jack_Switch_SMT
XKB Connectivity / Tensility International Corp
J101
3
68000-102HLF
0.100_2Pin
Amphenol ICC
J102, J103, J602
1
5555165-1
RJ12_6P6C_HORZ
TE Connectivity
J401
1
TYPE-C-31-M-12
USB_C_Receptacle_USB2.0
Korean Hroparts Elec
J501
1
530470210
1X2P 1.25 mm Header
MOLEX
J601
1
https://www.amazon.com/dp/B089D5NLW1
DFPlayermini
DFROBOT
J603
1
B2B-PH-K-S(LF)(SN)
2mm_2Pin
JST
J604
1
RH-5000
+5esp32
ronghe
+5esp32
2
0603L100SLYR
Polyfuse_Small_1A
Littelfuse
F101, F401
1
3386P-1-103LF
POT 0.375 10K
BOURNS
RV301
Show 46 more
QtyPartRefs
2
TE Connectivity 1825910-7, Dongguan Guangzhu Industrial C13828
SWITCH_TACTILE_SPST-NO_0.05A_24V
TE Connectivity ALCOSWITCH Switches
S101, S102
1
B3F-4055
SWITCH_TACTILE_12mmx12mm_SPST-NO_0.05A_24V
Omron Electronics
S601
1
EC11E18244AU
RotaryEncoder_Switch
ALPSALPINE
SW101
3
NA
ToolingHole_Pad_1.152mm
NA
T101, T102, T103
1
RH-5000
TP+3.3V
ronghe
TP100
4
RH-5116
TP_GND
ronghe
TP101, TP104, TP105, TP106
1
RH-5000
Vin
ronghe
TP102
1
RH-5000
+5V
ronghe
TP103
1
RH-5004
U0_RX
ronghe
TP108
1
RH-5000
3v3Controller
ronghe
TP109
1
RH-5000
VBus
ronghe
TP201
1
RH-5000
V3
ronghe
TP202
1
RH-5004
nCTS
ronghe
TP203
1
RH-5004
nRST
ronghe
TP204
1
RH-5000
3V3USB
ronghe
TP205
1
RH-5004
U0_TX
ronghe
TP206
1
RH-5004
CIPO
ronghe
TP301
1
RH-5004
+12in
ronghe
TP302
1
RH-5004
SCK
ronghe
TP303
1
RH-5004
COPI
ronghe
TP304
1
RH-5004
SS
ronghe
TP305
1
RH-5000
5VRaw
ronghe
TP306
1
RH-5000
Vcc_LCD
ronghe
TP401
1
RH-5004
nINT
ronghe
TP402
1
RH-5004
SCL
ronghe
TP403
1
RH-5004
SDA
ronghe
TP404
1
RH-5000
Vcontrast
ronghe
TP405
1
RH-5000
5VDFP
ronghe
TP501
6
NA
U_Box_V104_General_Alarm_Device_LED_Standoff
NA
MF103, MF601, MF602, MF603, MF604, MF605
3
SS210
Schottky 2A
MDD（Microdiode Electronics）
D101, D103, D104
1
LTL2R3KEK
LED_T1.75_CLEAR_RED
Lite-On Inc.
D105
1
LTST-C171KRKT
RED 0603
Lite-On Inc.
D106
5
LTW-2R3D7
LED_T1.75_CLEAR_WHITE
Lite-On Inc.
D201, D202, D203, D204, D205
4
BAT54S,215
BAT54S
Nexperia
D301, D302, D303, D304
1
KT-0603R
RED 0603
Hubei KENTO Elec
D501
1
CC0603JRNPO9BN390
39pF
YAGEO
C101
9
RVT47UF16V67RV0019
47uF 16V
KNSCHA
C102, C106, C109, C115, C118, C302, C502, C505 +1
16
CC0603KRX7R9BB104
100nF
YAGEO
C103, C105, C108, C116, C117, C301, C303, C501 +8
11
RMC060315%N
1R0
TyoHM
R101, R213, R216, R305, R307, R309, R310, R512 +3
7
RMC 0603 10K F N
10K
TyoHM
R102, R214, R215, R603, R1003, R1004, R1005
4
DNI
TyoHM
R106, R107, R306, R308
26
RMC06033301%N
330R
TyoHM
R110, R112, R202, R204, R206, R208, R210, R401 +18
4
RMC0603391%N
39R
TyoHM
R113, R114, R115, R116
24
RMC 0603 4K7 F N
4K7
TyoHM
R201, R203, R205, R207, R209, R217, R301, R302 +16
2
0603WAF5101T5E
5K1
UNI-ROYAL(Uniroyal Elec)
R211, R212
1
RMC06031K1%N
1K
TyoHM
R304

KRAKE design files

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

KRAKE: common questions

What microcontroller does the KRAKE use?

The KRAKE is built around the ESP32-WROOM-32E-N4, from the ESP32 family.

How big is the KRAKE PCB?

The KRAKE measures 137.2 × 83.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KRAKE?

195 components, from 66 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 KRAKE design files?

From the PubInv/krake 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 KRAKE design in my own project?

Yes, under the terms of its AGPL-3.0 license, which PubInv chose for the repository.

Can I test firmware for the KRAKE 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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