2 layers246.4 × 120.6 mm
2 layers81 × 98 mm
REFLOW OVEN V2
Charading/NETTA-Reflow-Oven-ConversionI converted my NETTA Mini Oven 20L into a reflow oven.
- Size
- 81 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 74
- Nets
- 79
- Pads
- 263
- Tracks, vias
- 493, 142
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Jan 2026
- Updated
- 31 Jan 2026
Overview
REFLOW OVEN V2 is an open-source printed circuit board by Charading, from the Charading/NETTA-Reflow-Oven-Conversion repository on GitHub. It is a 2-layer board of 81 × 98 mm with 74 parts on 79 nets, routed with 493 tracks and 142 vias.
It is built around the CH340C, ESP32-WROOM-32 and HLK-5M05, with the AP2112K-3.3, MAX31855 and PESD5V0V1BA among its other parts. Its parts include 21 resistors, 13 connectors, 8 diodes, 5 capacitors and 4 ICs. It belongs with the ESP32 boards of this library.
Main components
9
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
HLK-5M05
DIP,38x23mm0.1W 18mm 1A 23mm 38mm 3kV 50mVp-p 5V 5W 70% 70V~350V 85VAC~264VAC AC/DC-DC Short Circuit Protection、Over Current Protection ±0.2% DIP,38x23mm AC-DC Power Modules ROHSHI-LINKAC-DC Power Modules
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
MAX31855
UncategorisedMaxim Integrated (Analog Devices)
PESD5V0V1BA
SOD-323-55℃~+150℃ 1 11pF 12.5V 1nA 4.8A@8/20us 45W 5.8V 5V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 SOD-323 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
1N5819M
MELFUncategorisedDiodes Incorporated1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
UMH3N
SOT-363-55℃~+150℃ 0.5uA 100 100mA 150mW 2 NPN (Pre-Biased) 250MHz 300mV 50V 5V 6.11kΩ NPN SOT-363 Digital Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Digital Transistors
README
README.mdNETTA Reflow Oven
A DIY reflow oven controller based on the ESP32.
Project Structure
NETTA_Reflow_Oven/
├── firmware/ # ESP32 PlatformIO project
├── hardware/ # PCB designs, schematics, 3D models
└── docs/ # DocumentationFeatures
- Temperature Control: PID-controlled SSR for precise heating
- Multiple Profiles: 600s, 400s, and 30s test profiles
- TFT Display: Real-time temperature and profile graph
- Servo Door Control: Automatic door opening during cooling
- WiFi OTA Updates: Update firmware wirelessly
- Safety Features: Auto-stop, cooling phase door control
WiFi OTA Update
- Connect to WiFi:
ReflowOven(password:reflow1234) - Open browser:
http://192.168.4.1 - Upload new
firmware.binfile
Button Controls
| Button | Stopped | Running |
|---|---|---|
| Test (GP27) | Cycle profile / Hold 3s: WiFi info | Stop reflow |
| Start (GP17) | Start reflow | Pause / Hold 2s: Stop |
| Page (GP32) | Switch page | Switch page |
| Pause (GP35) | Toggle door | Pause/Resume |
Building Firmware
Requires PlatformIO.
cd firmware
pio run -t uploadLicense
MIT
Parts
74| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10K | Mars_Library:R_0603 | R6, R7, R14, R15, R16, R17, R18, R19, R20, R21 |
| 5 | 0R | Mars_Library:R_0603 | R4, R5, R11, R12, R13 |
| 3 | DC | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J8, J9, J10 |
| 3 | PESD5V0V1BA | PCM_Diode_SMD_AKL:D_SOD-523_TVS | D3, D4, D5 |
| 2 | 1.5k_0603 | Mars_Library:R_0603 | R9, R10 |
| 2 | 10uF | Mars_Library:C_0603 | C1, C2 |
| 2 | 5.1K | Mars_Library:R_0603 | R2, R3 |
| 2 | 600R | Mars_Library:Ferrite_0805 | FB1, FB2 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J11, J12 |
| 2 | TestPoint_Keystone_5015_Micro_Mini | TestPoint:TestPoint_Keystone_5015_Micro_Mini | -, BUZZ |
| 1 | 100n | Mars_Library:C_0805 | C4 |
| 1 | 100nF | Mars_Library:C_0603 | C3 |
| 1 | 10K | Mars_Library:R_0805 | R8 |
| 1 | 10n | Mars_Library:C_0805 | C5 |
| 1 | 1N5819M | PCM_Diode_SMD_AKL:D_SOD-123 | D2 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-123 | D8 |
| 1 | 2K | Mars_Library:R_0603 | R1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | BOOT | Mars_Library:SW_SPST_SMD_3x4x2mm | SW2 |
| 1 | BUZZ | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J6 |
| 1 | Breakout | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | CP_Elec_4x3 | Capacitor_SMD:CP_Elec_4x3 | 100uF |
| 1 | EN | Mars_Library:SW_SPST_SMD_3x4x2mm | SW1 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U1 |
| 1 | Fuse | Fuse:Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F1 |
| 1 | GREEN | LED_THT:LED_D3.0mm | D7 |
| 1 | HLK-5M05 | Converter_ACDC:Converter_ACDC_Hi-Link_HLK-5Mxx | PS1 |
| 1 | MAX31855 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | PAGE | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | B2 |
| 1 | PAUSE | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | B4 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | RED | LED_THT:LED_D3.0mm | D6 |
| 1 | SSR | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J5 |
| 1 | START | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | B1 |
| 1 | TEST | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | B3 |
| 1 | Therm | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J1 |
| 1 | UMH3N | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q1 |
| 1 | USB | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J13 |
| 1 | USB_C | Mars_Library:USB_C_Receptacle_HRO_TYPE-C-31-M-12 (16P) | J3 |
| 1 | VAC_TERMINAL | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J7 |
| 1 | Varistor | Varistor:RV_Disc_D9mm_W4.2mm_P5mm | RV1 |
| 1 | tft | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J4 |
The 66 most common of 74 parts.
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Questions
How big is the REFLOW OVEN V2 PCB?
It measures 81 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the REFLOW OVEN V2 use?
74 parts, built around the CH340C, ESP32-WROOM-32, HLK-5M05 and AP2112K-3.3. 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 REFLOW OVEN V2 KiCad files?
From the Charading/NETTA-Reflow-Oven-Conversion repository on GitHub, at the commit this page was made from: the board is hardware/REFLOW_OVEN_V2.kicad_pcb and its schematic hardware/REFLOW_OVEN_V2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the REFLOW OVEN V2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Charading before reusing the design.