2 layers141 × 56.9 mm
2 layers79.7 × 62.6 mm
OpenReflow
CarlosGS/OpenReflow25Simple reflow oven controller that is configurable from a phone
- Size
- 79.7 × 62.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 25
- Pads
- 106
- Tracks, vias
- 221, 23
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20170123)
- Created
- 10 Nov 2017
- Updated
- 12 Mar 2022
Overview
OpenReflow is an open-source printed circuit board by CarlosGS, from the CarlosGS/OpenReflow repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 79.7 × 62.6 mm with 39 parts on 25 nets, routed with 221 tracks and 23 vias.
It is built around the IRM-02-3.3, K814P and IRLML6344TRPBF. Its parts include 13 resistors, 10 connectors, 6 capacitors, 3 switches and 2 ICs. It belongs with the ESP8266 boards of this library.
Main components
3
IRM-02-3.3
DIP,33.7x22.2mm1 2W 3.3V 600mA 66% 85VAC~305VAC DIP,33.7x22.2mm Power Module/Power Supply ROHSMWAC-DC Power Modules
K814P
DIP-4-40℃~+100℃ 1 1.25V 20% 250mW 300% 300mV@10mA,1mA 3us 4.7us 50mA 5kV 60mA 70V AC,DC Integrated anti-parallel LED Phototransistor DIP-4 Transistor, Photovoltaic Output Optoisolators ROHSVishay IntertechnologyTransistor, Photovoltaic Output Optoisolators
IRLML6344TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.1V 1.3W 29mΩ@4.5V 30V 46pF 5A 6.8nC 650pF SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
README
README.mdOpenReflow
Simple reflow oven controller based on ESP8266
NOT RECOMMENDED FOR NEW BUILDS!
Please note that for the temperature sensor, I used a voltage divider to read a PT100 element. This makes it necessary to manually calibrate, and even then it wouldn't be as accurate as using a proper RTC reading chip (i.e. MAX31865).
Also the "zero crossing" detector wasn't really necessary for the small wattage and slow pulses involved (at most 1500W at 1Hz). It just adds complexity and makes the board more dangerous by mixing digital and live tracks.
In the end I think it would be more simple to just flash a standard Sonoff switch and wire an external temperature sensor module.
More information can be found in PCBway
https://www.pcbway.com/project/shareproject/OpenReflow.html
License
Software is GPLv3, Hardware (PCB) is CC-BY-SA.
Author: Carlos Garcia Saura (@CarlosGS)
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistors_SMD:R_0805_HandSoldering | R5, R7, R8, R11, R12, R13 |
| 4 | 10u | Capacitors_SMD:C_1206_HandSoldering | C1, C2, C3, C4 |
| 4 | mount | Mounting_Holes:MountingHole_4.5mm_Pad | J7, J8, J9, J10 |
| 3 | 1k | Resistors_SMD:R_0805_HandSoldering | R3, R9, R10 |
| 2 | 100k | Resistors_SMD:R_1206_HandSoldering | R1, R2 |
| 2 | 100n | Capacitors_SMD:C_0805_HandSoldering | C5, C6 |
| 2 | IRLML6344TRPbF | TO_SOT_Packages_SMD:SOT-23 | Q1, Q2 |
| 2 | SW_Push | smd_button:smd_button | SW1, SW2 |
| 1 | 3.3V | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J3 |
| 1 | 47 | Resistors_SMD:R_0805_HandSoldering | R6 |
| 1 | BUTTON | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J6 |
| 1 | Buzzer | Buzzers_Beepers:MagneticBuzzer_ProSignal_ABI-009-RC | BZ1 |
| 1 | DG35C-B-05P-13-200AH | Connectors_Terminal_Blocks:TerminalBlock_bornier-5_P5.08mm | J1 |
| 1 | ESP-12 | esp8266:ESP-12 | U2 |
| 1 | IRM-02-3.3 | Converters_DCDC_ACDC:ACDC-Converter_MeanWell-IRM-02-x | T1 |
| 1 | K814P | K814P:DIP762W50P254L458H480Q4 | U1 |
| 1 | R | Resistors_SMD:R_0805_HandSoldering | R4 |
| 1 | SANYOU_SRD_Form_C | Relays_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K1 |
| 1 | SERIAL | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J5 |
| 1 | SERVO | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J4 |
| 1 | THERMISTOR | Connectors_Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm | J2 |
| 1 | VF=1.2V | Diodes_SMD:D_SMA | D1 |
Questions
How big is the OpenReflow PCB?
It measures 79.7 × 62.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OpenReflow use?
39 parts, built around the IRM-02-3.3, K814P and IRLML6344TRPBF. 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 OpenReflow KiCad files?
From the CarlosGS/OpenReflow repository on GitHub, at the commit this page was made from: the board is Electronics/open_reflow.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenReflow design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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