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 regulates the power supplied to the heater to regulate the temperature of the enclosure.
This repository is a work in progress. It contains:
- KiCAD design for the PCB.
- Source code for the device firmware.
- OpenSCAD design for 3D printed components.
Instructions for the assembly of the device are in this are at my blog.
Please also see the other entries describing this project:
Components needed for making this device, along with links and approximate price as of September 2024:
| Item | Source | Approximate cost |
|---|---|---|
| Coleman 16 qt cooler | Amazon | $23 |
| PTC Air Heater 12V 100W | AliExpress | $7 |
| DC 12V 5A Power Supply | Amazon | $12 |
The circuit board design is in KiCAD/.
These require footprints in chl33_library and symbols in chl33_kicad_sym.
Designs for 3D-printable components are in scad/.
The EBox is based on the ProjectBox OpenSCAD system.
The heater mount secures the heater and temperature/humidity sensor inside the cooler.
The Cooler plug helps avoid heat leaking through the hole through which wires run from the heater mount through the wall of the cooler to the EBox.
The software is based on the og3 library.