2 layers17.8 × 30.5 mm
2 layers68.5 × 62 mm
ESPSauna
Ehryk/ehryk.github.com2Code
- Size
- 68.5 × 62 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 46
- Nets
- 50
- Pads
- 140
- Tracks, vias
- 182, 54
- Pours
- 57
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Dec 2011
- Updated
- 24 Aug 2026
Overview
ESPSauna is an open-source printed circuit board by Ehryk, from the Ehryk/ehryk.github.com repository on GitHub. It is a 2-layer board of 68.5 × 62 mm with 46 parts on 50 nets, routed with 182 tracks and 54 vias.
It is built around the HLK-5M12, AM2302 and AP63203WU, with the AO3400A, BAT54S and BZX84C3V3 among its other parts. Its parts include 11 capacitors, 9 resistors, 3 ICs, 3 diodes and 2 transistors. It belongs with the ESP32 boards of this library.
Main components
6
HLK-5M12
DIP,38x23mm0.1W 12V 18mm 23mm 38mm 3kV 450mA 5W 70% 70V~350V 70mVp-p 85VAC~264VAC AC/DC-DC Short Circuit Protection、Over Current Protection DIP,38x23mm AC-DC Power Modules ROHSHI-LINKAC-DC Power Modules
AM2302
插件0%RH~99.9%RH 16bit 3.3V~5.5V 300uA Single-bus ±0.5℃ ±2%RH SIP-4 Temperature and Humidity Sensor ROHSAosong ElecTemperature And Humidity Sensor
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsBAT54S
SOT-231 Pair Series Connection 1V@100mA 200mA 2uA@25V 30V 600mA SOT-23 Schottky Diodes ROHSMDDSchottky DiodesBZX84C3V3
SOT-23Zener Diodeshongjiacheng
README
README.mdehryk.github.com
This is my github pages repo, viewable at ehryk.github.io. It also has some setup files that I sync between various computers, most notably git and bash aliases.
Github Pages (/, /js, /css, /img)
- xkcd 1288 Substitutions Bookmarklet
/linux && /git
These are the settings I sync between various computers. Update Config.bat for windows, update-config.sh for linux.
/rainmeter
Custom Rainmeter skins for GPU and CPU temps, etc.
/brian
Brian's Stuff. See more at Dr. Bird.org
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | WIRE | Ehryk:WIRE-18AWG | W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11 |
| 6 | 0.1μF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C4, C7, C8, C9 |
| 2 | 10kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R8 |
| 2 | 10μF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C11 |
| 2 | 22kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R6 |
| 2 | 22μF | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C5, C6 |
| 2 | 47Ω | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R7 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | BAT54S | Package_TO_SOT_SMD:SOT-23 | D1, D3 |
| 2 | TE-SPDT | Ehryk:TE-SPDT | RLY1, RLY2 |
| 1 | 1μF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 220Ω | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 4.7kΩ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 43kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | 6.8μF | Inductor_SMD:L_Abracon_ASPI-0630LR | L1 |
| 1 | AM2302 | Sensor:ASAIR_AM2302_P2.54mm_Vertical | U3 |
| 1 | AP63203WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | BZX84C3V3 | Package_TO_SOT_SMD:SOT-23 | D2 |
| 1 | CT Clamp | Connector_Audio:Jack_3.5mm_CUI_SJ1-3523N_Horizontal | J1 |
| 1 | Common | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | ESP32-DEVKIT-V1 | Ehryk:ESP32_DEVKIT_V1 | U4 |
| 1 | HLK-5M12 | Ehryk:HLK5M12 | PS1 |
| 1 | SHT45 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
Questions
How big is the ESPSauna PCB?
It measures 68.5 × 62 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ESPSauna use?
46 parts, built around the HLK-5M12, AM2302, AP63203WU and AO3400A. 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 ESPSauna KiCad files?
From the Ehryk/ehryk.github.com repository on GitHub, at the commit this page was made from: the board is Circuits/ESPSauna/ESPSauna.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESPSauna design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ehryk before reusing the design.
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