HardLabs

Stencil

mikelawrence·esphome-indoor-multi-sensor-hardware·pcb/stencil/stencil.kicad_pcb

Stencil PCB layout, top view — open source ESP32 board by mikelawrence
Simulate this board

About the Stencil PCB

Stencil is an open source ESP32 PCB design by mikelawrence, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 52.5 × 59.7 mm, with 97 components from 44 distinct parts.

Its main chip is the ESP32-S3-WROOM-2-N32R16V, from the ESP32 family. Other key parts include the SN74LV1T34DBV, TLV62568DRL, MAX98357AETE, TLV75533PDRV and INA228AIDGSR. By type, the board carries 41 capacitors, 21 resistors, 19 ICs, 6 connectors, 4 diodes and 2 switches.

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

From the project

ESPHome Indoor Multi-Sensor hardware. This design supports Radar/PIR Presence, Temperature, Humidity, Pressure, Light, CO2, CO, VOC, NOX and PM sensors. Add a speaker and microphone and you have the kitchen sink too! Click the link below to configure a new device.

The PCB is designed in KiCad. Fabrication and is tuned toward JCLPCB. I chose not to use JLCPCB for assembly because they had a hard time with some the parts I included in this design. When I had the boards fabricated I also had them panelize two PCBs and produce a stencil for both for the panelized boards.

Stencil, from the project README
From the project README

Main components on the Stencil

SN74LV1T34DBVTLV62568DRLMAX98357AETETLV75533PDRVESP32-S3-WROOM-2-N32R16VINA228AIDGSRTSL2591SGP41-D-R4SCD41-D-R2BMP581MCP6042T-I/MSADS1115IDGSSHT45-AD1B-R2EKMC1603111TGS5141-P00DS18S20+

Stencil bill of materials (BOM)

97 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN74LV1T34DBV
Texas Instruments
U1
2
TLV62568DRL
Texas Instruments
U2, U5
1
MAX98357AETE
MAX98357A
Maxim
U3
1
TLV75533PDRV
Texas Instruments
U4
1
ESP32-S3-WROOM-2-N32R16V
Espressif
U6
3
INA228AIDGSR
INA228
Texas Instruments
U7, U18, U19
1
TSL2591
AMS
U8
1
SGP41-D-R4
SGP41
Sensirion
U9
1
SCD41-D-R2
SCD41
Sensirion
U10
1
BMP581
Bosch Sensortec
U11
1
MCP6042T-I/MS
MCP6042
Microchip
U12
1
ADS1115IDGS
ADS1115
Texas Instruments
U13
1
SHT45-AD1B-R2
SHT45
Sensirion
U14
1
EKMC1603111
Panasonic
U15
1
TGS5141-P00
TGS5141
Figaro
U16
1
DS18S20+
DS18S20
Maxim
U17
1
MMBFJ201
Onsemi
Q1
1
BM06B-GHS-TBT
SEN66
JST
J1
1
1332645
USB-C
Phoenix Contact
J2
1
CES-105-01-T-S
SEN0609
Samtec
J3
Show 24 more
QtyPartRefs
1
RSM-105-02-S-S
LD2410
Samtec
J4
1
CMS-251437-24SP-X8
SPKR
Same Sky
J5
1
79109-1003
LD2450
Molex
J6
1
ICS-43434
TDK InvenSense
MK1
1
B3U-1000P
BOOT
Omron
SW1
1
B3U-1000P
RESET
Omron
SW2
3
ESDA8P80-1U1M
STMicroelectronics
D1, D2, D3
1
1938
NeoPixel_THT
Adafruit
D4
2
DFE252012F-1R0M=P2
1uH
Murata
L1, L2
11
CL05A105KA5NQNC
1uF
Samsung
C1, C4, C5, C22, C25, C26, C27, C31 +3
12
GRM188R60J226MEA0D
22uF
Murata
C2, C3, C8, C9, C11, C12, C13, C15 +4
18
CL05B104KB54PNC
100nF
Samsung
C6, C7, C10, C14, C17, C20, C21, C23 +10
1
CRCW0402499KFKED
499KΩ
Vishay / Dale
R1
4
CRCW0402100KFKED
100KΩ
Vishay / Dale
R2, R5, R11, R16
1
CRCW0402634KFKED
634KΩ
Vishay / Dale
R3
1
CRCW0402453KFKED
453KΩ
Vishay / Dale
R4
6
CRCW04025K10FKED
5.1KΩ
Vishay / Dale
R6, R7, R17, R18, R19, R20
1
WSLP0603R0680FEA
68mΩ
Vishay
R8
1
WSL0805R1500FEA18
150mΩ
Vishay
R9
1
WSLP0603R0800FEB
80mΩ
Vishay
R10
2
CRCW040210K0FKED
10KΩ
Vishay / Dale
R12, R13
1
CRCW04024R70FKED
4.7Ω
Vishay / Dale
R14
1
CRCW040264K9FKED
64.9KΩ
Vishay / Dale
R15
1
CRCW0402133KFKED
133KΩ
Vishay / Dale
R21

Stencil design files

The KiCad project lives in the mikelawrence/esphome-indoor-multi-sensor-hardware repository on GitHub; these links point at the commit this page was built from.

Stencil: common questions

What microcontroller does the Stencil use?

The Stencil is built around the ESP32-S3-WROOM-2-N32R16V, from the ESP32 family.

How big is the Stencil PCB?

The Stencil measures 52.5 × 59.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Stencil?

97 components, from 44 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 Stencil design files?

From the mikelawrence/esphome-indoor-multi-sensor-hardware repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Stencil design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which mikelawrence chose for the repository.

Can I test firmware for the Stencil 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.

More boards in esphome-indoor-multi-sensor-hardware

Similar boards