2 layers40.6 × 36.8 mm
KTYSimulator
JuergenMH/SaunaControlUnit
Control unit for sauna oven. Ensures comfort and safety.
21 parts
2 layers190 × 110 mm
SaunaPCB
JuergenMH/SaunaControlUnitControl unit for sauna oven. Ensures comfort and safety.
- Size
- 190 × 110 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 84
- Pads
- 277
- Tracks, vias
- 662, 72
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Jan 2026
- Updated
- 22 Mar 2026
Overview
SaunaPCB is an open-source printed circuit board by JuergenMH, from the JuergenMH/SaunaControlUnit repository on GitHub. It is a 2-layer board of 190 × 110 mm with 78 parts on 84 nets, routed with 662 tracks and 72 vias.
It is built around the ESP32-DEVKITC-VE, LM2576T-5.0 and ULN2003, with the RP310024, S1G and B2B-ZR among its other parts. Its parts include 23 resistors, 14 connectors, 10 ICs, 8 diodes and 7 switches. It belongs with the ESP32 boards of this library.
Main components
9
ESP32-DEVKITC-VE
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
LM2576T-5.0
TO-220-5-40℃~+125℃@(TJ) 1 3A 40V 52kHz 5V 5mA Buck Buck Built-in Fixed TO-220-5 DC-DC Converters ROHSHGSEMIDC-DC Converters
ULN2003
SOP-161.1V@250uA,100mA 25pF 2V 30V 500mA 50uA 50uA Seven channels SOP-16 Darlington Transistor Arrays ROHSBLDarlington Transistor ArraysRP310024
-Power RelaysTE Connectivity
S1G
SMA(DO-214AC)-55℃~+150℃ 1.1V@1A 1A 30A 400V 5uA Independent SMA(DO-214AC) Diodes - General Purpose ROHSTWGMCDiodes - General Purpose
B2B-ZR
插件,P=1.5mmWire To Board ConnectorJST
B4B-ZR
插件,P=1.5mmWire To Board ConnectorJST
B5B-ZR
插件,P=1.5mmWire To Board ConnectorJSTSB240
DO-15UncategorisedLGE
README
README.mdSaunaControlUnit
Control unit for sauna oven. Ensures comfort and safety. Cheap control units are good for regualation and some basic safetey functions. This project is designed to add some comfort and safety topics
- Enhanced safety by control internal power lines and oven function
- Enhanced comfort: Acceess via WLAN
- Two relay banks to ensure the system in case of one relay fails
Folders: Components: Datasheets and information hardware component related Documents: Planning Documents SaunaPCB: KiCAD folder for schematic and PCB design files Simulation: Folder for LTSpice simulation fils Firmware: Planned for firmware files, currently empty
Sorry, some documents are available in German only ;-)
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10K | Resistor_SMD:R_1206_3216Metric | R202, R210, R211, R212, R213, R301, R302, R303, R305, R307 |
| 7 | RP310024 | MyRelays:Standard_Relay_double Pins | K201, K202, K203, K204, K205, K206, K207 |
| 6 | 100K | Resistor_SMD:R_1206_3216Metric | R201, R204, R205, R206, R207, R208 |
| 6 | S1G | Diode_SMD:D_SMA_Handsoldering | D201, D202, D205, D206, D207, D208 |
| 5 | KL2RM5.08 | MyConnectors:Terminal_Block_2_RM5.08 | J204, J301, J302, J303, J304 |
| 5 | KL3RM7.62 | MyConnectors:Terminal_Block_3_RM7.62 | J201, J202, J203, J205, J206 |
| 5 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H201, H202, H203, H204, H205 |
| 3 | 2K2 | Resistor_SMD:R_1206_3216Metric | R306, R309, R310 |
| 3 | 4N25 | Package_DIP:DIP-4_W7.62mm | U203, U204, U205 |
| 3 | Coil+DRV5053 | SaunaProject:Current_Coil_19X14_w_Hall | U206, U207, U208 |
| 2 | 1nF | Capacitor_THT:C_Axial_L12.0mm_D6.5mm_P15.00mm_Horizontal | C201, C203 |
| 2 | 2K 1% | Resistor_SMD:R_1206_3216Metric | R304, R308 |
| 1 | 1000µF/16V 105°C Low ESR | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C205 |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric | R209 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C206 |
| 1 | 100µF/63V 105°C Low ESR | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C204 |
| 1 | 100µH | Inductor_THT:L_Radial_D7.5mm_P5.00mm_Fastron_07P | L203 |
| 1 | 1A/M | Fuse:Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F201 |
| 1 | 1K5 | Resistor_SMD:R_1206_3216Metric | R203 |
| 1 | 275V | Varistor:RV_Disc_D12mm_W4.2mm_P7.5mm | RV201 |
| 1 | 3-pol-Pfosten | Connector_PinHeader_1.00mm:PinHeader_1x03_P1.00mm_Vertical | J308 |
| 1 | 33nF | Capacitor_THT:C_Axial_L12.0mm_D6.5mm_P15.00mm_Horizontal | C202 |
| 1 | 500mA/M | Fuse:Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F202 |
| 1 | B2B-ZR | MyConnectors:B2B-ZR | J305 |
| 1 | B4B-ZR | MyConnectors:B4B-ZR | J306 |
| 1 | B5B-ZR | MyConnectors:B5B-ZR | J307 |
| 1 | ESP32-DEVKITC | MyESP32:ESP32_DevKit_V4 | U302 |
| 1 | LED 5mm green | MyConnectors:B2B-ZR | D204 |
| 1 | LHE05-20B24 | Mornsun_ACDC:LHE05-20B24 | U201 |
| 1 | LM2576T-5 | Package_TO_SOT_THT:TO-220-5_Vertical | U202 |
| 1 | SB240 | Diode_THT:D_A-405_P10.16mm_Horizontal | D203 |
| 1 | Speaker_Crystal | Buzzer_Beeper:Buzzer_TDK_PS1240P02BT_D12.2mm_H6.5mm | LS301 |
| 1 | ULN2003 | Package_DIP:DIP-16_W7.62mm | U301 |
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Questions
How big is the SaunaPCB PCB?
It measures 190 × 110 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SaunaPCB use?
78 parts, built around the ESP32-DEVKITC-VE, LM2576T-5.0, ULN2003 and RP310024. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the SaunaPCB KiCad files?
From the JuergenMH/SaunaControlUnit repository on GitHub, at the commit this page was made from: the board is SaunaPCB/SaunaPCB.kicad_pcb and its schematic KTYSimulator/KTYSimulator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SaunaPCB design in my own project?
Its repository states no licence, so its author keeps all rights: ask JuergenMH before reusing the design.