HardLabs

Water kettle

dmatscheko·water_kettle·pcb_design/kicad_project/wasserkocher.kicad_pcb

Water kettle PCB layout, top view — open source ESP32 board by dmatscheko

About the Water kettle PCB

Water kettle is an open source ESP32 PCB design by dmatscheko, published on GitHub. It is a 2-layer board measuring 59.8 × 127.4 mm, with 53 components from 28 distinct parts.

Its main chip is the ESP32-S3-WROOM-1-N8R2, from the ESP32 family. Other key parts include the PCA9306DCTT and AZ1117CH-3.3TRG1. By type, the board carries 14 capacitors, 14 resistors, 7 diodes, 6 switches, 3 ICs and 3 connectors.

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

From the project

ESP32-S3 running ESPHome on a custom KiCad PCB for the base of a SEVERIN WK 3479 water kettle

Replacement electronics for the base of a SEVERIN WK 3479 water kettle: an ESP32-S3 running ESPHome on a custom KiCad PCB. It adds precise target temperatures, a keep-warm mode and full Home Assistant integration — and keeps working completely standalone when Wi-Fi or Home Assistant are down.

Check that the fuse in the design is the correct one. Add an inrush current limiting resistor before the capacitor. (The built prototype has one retrofitted with wires, but the PCB design still needs to be changed accordingly.) * Add a capacitor relief (discharge) resistor if the power supply does not…

Water kettle, from the project README
From the project README

Main components on the Water kettle

PCA9306DCTTESP32-S3-WROOM-1-N8R2AZ1117CH-3.3TRG1

Water kettle bill of materials (BOM)

53 components, 28 distinct parts.

QtyPartRefs
1
PCA9306DCTT
Texas Instruments
IC1
1
ESP32-S3-WROOM-1-N8R2
ESP32-S3-WROOM-1
Espressif Systems
U1
1
AZ1117CH-3.3TRG1
3.3v 1A
Diodes Incorporated
U2
1
MMBT2222LT1G
Q_NPN_BEC
onsemi
Q1
1
USB4940-00-A
GCT
J1
1
Do not populate
J2
1
M20-9990245
NTC Conn
Harwin Inc.
J3
1
SF-2410SP200W-2
2A 250V T
Bourns Inc.
F1
1
G2RL-1A-E-HA DC5
Omron Electronics Inc-EMC Div
K1
1
CPT-9019S-SMT-TR
Same Sky
LS1
1
TUHS3F05
Cosel USA, Inc.
PS1
1
MOV-10D561K
10D561K
Bourns Inc.
RV1
4
TS04-66-50-BK-100-SMT-TR
Same Sky (Formerly CUI Devices)
S1, S2, S3, S4
2
PTS636SK25SMTR LFS
SW_Push
C&K
SW1, SW2
2
STPS2L30A
D_Schottky
STMicroelectronics
D1, D2
1
NRVA4007T3G
onsemi
D5
4
4684
WS2812B-2020
Adafruit Industries LLC
D6, D7, D8, D9
3
C1206C106M3PACTU
10 uF
KEMET
C1, C10, C13
1
C1206C105M4RACTU
1 uF
KEMET
C2
8
C0603C104K5RACTU
0.1 uF
KEMET
C3, C4, C5, C6, C7, C11, C12, C14
Show 8 more
QtyPartRefs
1
X2P2104KN1B0130120060ES0
0.1 uF 275VAC
Songtian Electronic Technology (HK) Limited
C8
1
400BXW18MEFR16X16
Rubycon
C9
2
ERJ-8GEY0R00V
0R
Panasonic Electronic Components
R1, R14
6
ERJ-8GEYJ103V
10K
Panasonic Electronic Components
R2, R7, R9, R10, R12, R13
2
ERJ-8GEYJ512V
5.1K
Panasonic Electronic Components
R3, R4
2
ERJ-P08J102V
1K
Panasonic Electronic Components
R6, R15
1
ERJ-8GEYJ204V
200K
Panasonic Electronic Components
R11
1
ERJ-8GEYJ104V
100K
Panasonic Electronic Components
R16

Water kettle design files

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

Water kettle: common questions

What microcontroller does the Water kettle use?

The Water kettle is built around the ESP32-S3-WROOM-1-N8R2, from the ESP32 family.

How big is the Water kettle PCB?

The Water kettle measures 59.8 × 127.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Water kettle?

53 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Water kettle design files?

From the dmatscheko/water_kettle repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Water kettle design in my own project?

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

Can I test firmware for the Water kettle 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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