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Dough133

chl33·Dough133·KiCAD/DoughLee2.kicad_pcb

Dough133 PCB layout, top view — open source ESP32 board by chl33

About the Dough133 PCB

Dough133 is an open source ESP32 PCB design by chl33, published on GitHub under the MIT license. It is a 4-layer board measuring 69.9 × 44.5 mm, with 59 components from 39 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the SHTC3, AMS1117-3.3, SN74LVC1G123DCUR and 74LVC1G08. By type, the board carries 5 ICs, 4 LEDs, 2 connectors, 2 jumpers, 1 inductor and 1 capacitor.

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

From the project

A temperature-controlled container for proofing and fermenting soughdough

Dough133 is a temperature-controlled container for proofing and fermenting sourdough. It uses a small cooler and a PTC heater with a fan to heat the inside of the cooler. A PCBA with an ESP32 controls the power supplied to the heater to regulate the temperature of the enclosure.

This repository contains: - KiCAD design for the PCB. - Source code for the device firmware. - OpenSCAD design for 3D printed components.

Dough133, from the project README
From the project README

Main components on the Dough133

SHTC3ESP32-WROOM-32AMS1117-3.3SN74LVC1G123DCUR74LVC1G08

Dough133 bill of materials (BOM)

59 components, 39 distinct parts.

QtyPartRefs
1
SHTC3
U1
1
ESP32-WROOM-32
U2
1
AMS1117-3.3
U3
1
SN74LVC1G123DCUR
U4
1
74LVC1G08
U5
1
Conn_01x06
J1
1
Edge2x6_Connector
J3
1
10nF (50V)
CB1
1
4.7uF
C_B1
6
100nF
C_RST1, Ca1, Ca2, Ca3, Ca4, Ca5
1
100pF
C_RT1
2
10uF
Cb2, Cb3
1
220uF (35Vx2)
Cbulk1
1
47uF
Cc1
1
44uF (16V)
Cc2
1
SS34
DB1
1
1N4001
DFAN1
1
SS34-E3/9AT
DHR1
2
Barrel_Jack
JHTR1, JPWR1
2
SolderJumper_2_Open
JP1, JP2
Show 19 more
QtyPartRefs
1
Conn_01x04_Female
J_OLED1
2
IRLB8721PBF
Q_FAN1, Q_HTR1
1
33k
RB1
1
43k
RB2
1
8.2k
RB3
2
100k
RPUSW1, R_T1
2
470
RRST1, Rt3
1
27k
R_RT1
2
2.2k
Rf1, Rf2
4
1k
Rl1, Rl2, Rl3, Rl4
2
490
Rt1, Rt2
2
12k
Ru1, Ru2
2
10k
Ru3, Ru4
1
SW_Push
SW_ON1
1
BD90610EFJ-CE2
U_B1
3
LED
D_HR1, D_LFN1, D_SFTY1
1
BLU
D_PWR1
1
100 μH
L1
1
180pF (50V)
C2

Dough133 design files

The KiCad project lives in the chl33/Dough133 repository on GitHub; these links point at the commit this page was built from.

Dough133: common questions

What microcontroller does the Dough133 use?

The Dough133 is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Dough133 PCB?

The Dough133 measures 69.9 × 44.5 mm, has 4 copper layers and is 2.07 mm thick.

How many components are on the Dough133?

59 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dough133 design files?

From the chl33/Dough133 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Dough133 design in my own project?

Yes, under the terms of its MIT license, which chl33 chose for the repository.

Can I test firmware for the Dough133 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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