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TDLOGY/HW_AC-DC-Flyback-5W-5V1A-Reference-Design
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24 parts4
2 layers88 × 78 mm
Lan outlet
ra0sms/ethernet-control-console1Ethernet control console
- Size
- 88 × 78 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 84
- Pads
- 205
- Tracks, vias
- 421, 30
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Nov 2025
- Updated
- 19 Oct 2026
Overview
Lan outlet is an open-source printed circuit board by ra0sms, from the ra0sms/ethernet-control-console repository on GitHub, published under the MIT licence. It is a 2-layer board of 88 × 78 mm with 58 parts on 84 nets, routed with 421 tracks and 30 vias.
It is built around the LM2575-3.3WU, UDN2981A-T and ULN2803A, with the SR240 among its other parts. Its parts include 16 fuses, 11 diodes, 10 resistors, 6 capacitors and 3 ICs. It belongs with the interfaces and adapters and radio and wireless boards and the STM32 boards of this library.
Main components
4
LM2575-3.3WU
TO-263-5-40℃~+125℃@(TJ) 1 1A 3.3V 4V~40V 52kHz 5mA Buck Buck Built-in Fixed No TO-263-5 DC-DC Converters ROHSMicrochip TechnologyDC-DC Converters
UDN2981A-T
DIP18-3008-Channel Source DriversALLEGRO MICROSYSTEMUncategorised
ULN2803A
SOP-18-300mil-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 500mA 50V 8 SOP-18-300mil Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
SR240
DO-15Uncategorisedhongjiacheng
README
README.mdEthernet control console
A device for controlling 8 outputs over Ethernet using a built-in web interface. The main outputs switch voltage, and each one is duplicated by an open-collector output.
It is built on an STM32F401 (Black Pill) and a W5500 Ethernet controller. You can configure it over USB with a console or the GUI application.
- Wi-Fi version with the same functionality: ESP8266_antenna_switch
- More information: https://ra0sms.com/ethernet-control-console
Specifications
| Parameter | Value |
|---|---|
| Input voltage | 5–45 V DC |
| Output current | 500 mA total for all 8 outputs (and 500 mA total for open-collector outputs) |
| Interface | Ethernet 10/100 (W5500), USB (virtual COM port) |
| MCU | STM32F401CCU6 / STM32F401CEU6 (Black Pill) |
| PCB size | 78 × 88 mm |
Operating modes
You select the mode in the web interface. It is saved together with the other settings.
| Mode | Behavior |
|---|---|
| Toggle | Each output toggles independently |
| Switch | Only one output is on at a time; turning one on turns the others off |
| Dual | Outputs 1–4 and 5–8 form two groups, each with its own Toggle/Switch mode |
Firmware
Prebuilt firmware is in firmware/:
w5500_outlet.hex– contains its own addressesw5500_outlet.bin– write to address0x08000000
Flashing with ST-Link
STM32CubeProgrammer:
STM32_Programmer_CLI -c port=SWD -w firmware/w5500_outlet.hex -v -rstst-flash:
st-flash --reset write firmware/w5500_outlet.bin 0x08000000Flashing over USB (DFU)
- Hold BOOT0, press and release NRST, then release BOOT0.
- Flash with STM32CubeProgrammer (
-c port=USB1) ordfu-util:
dfu-util -a 0 -s 0x08000000:leave -D firmware/w5500_outlet.binSettings are stored in flash sector 5 (
0x08020000–0x0803FFFF), separately from the firmware. A normal firmware update keeps the settings. A full chip erase resets them to defaults.
Default settings
| Parameter | Value |
|---|---|
| IP | 192.168.0.250 |
| Subnet mask | 255.255.255.0 |
| Gateway | 192.168.0.1 |
| DNS | 8.8.8.8 |
| MAC | 00:08:DC:AB:CD:EF |
| Web login / password | admin / password |
If you use more than one device on the same network, give each one its own IP and MAC address.
Web interface
Open http://<device IP>/ in a browser and log in (HTTP Basic Auth).
USB configuration
When you connect the board over USB, it appears as a virtual COM port (STM32 Virtual ComPort). Any port speed works.
You can configure it without the W5500 or the rest of the circuit: a bare Black Pill on USB is enough. The firmware detects the W5500 automatically and starts the web server when the module is connected.
Configuration software
gui/ contains a GUI application: gui.py (Python 3, pyserial, PyQt5) and a Windows build in gui-lan.zip.
Console commands
| Command | Description |
|---|---|
help | List commands |
network | Show network settings |
set ip <x.x.x.x> | Set IP address |
set subnet <x.x.x.x> | Set subnet mask (alias: sn) |
set gateway <x.x.x.x> | Set gateway (alias: gw) |
set dns <x.x.x.x> | Set DNS server |
set mac <xx:xx:xx:xx:xx:xx> | Set MAC address |
set user <name> | Set web login (1–31 characters) |
set pass <password> | Set web password (up to 31 characters) |
get <ip|mac|subnet|gateway|dns|user|pass> | Show a parameter |
buttons | Show output names |
setbutton <0-7> <name> | Rename an output (up to 15 characters) |
save | Save settings to flash |
load | Load settings from flash |
default | Reset to factory defaults and save |
reset | Reboot the device |
Changes take effect immediately, but they are saved only after save.
Example:
set ip 192.168.1.50
set gateway 192.168.1.1
setbutton 0 Antenna1
save
resetHardware
Schematic
Pinout
| Function | STM32 pins |
|---|---|
| Outputs 1–8 | PB0–PB7 |
| W5500 SPI (SCK / MISO / MOSI) | PA5 / PA6 / PA7 |
| W5500 CS | PA4 |
| W5500 RST | PA3 |
| Status LED | PC13 |
Boxed version
Building from source
The project is in code/ and is built with STM32CubeIDE (open code/ as an existing project). PCB files are in KiCad/.
To build from the command line, use the toolchain bundled with STM32CubeIDE (the generic arm-none-eabi-gcc does not support the -fcyclomatic-complexity flag):
export PATH=/opt/st/stm32cubeide_<version>/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.<version>/tools/bin:$PATH
cd code/Debug && make -j8 allLicense
See LICENSE.
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | Fuse | Resistor_SMD:R_1206_3216Metric | F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14, F15, F16 |
| 9 | 1k | Resistor_SMD:R_1206_3216Metric | R2, R3, R4, R5, R6, R7, R8, R9, R10 |
| 8 | A1 | Diode_SMD:D_1206_3216Metric | D4, D5, D6, D7, D8, D9, D10, D11 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 2 | 100n | Capacitor_SMD:C_1206_3216Metric | C1, C3 |
| 2 | Conn_01x06_Pin | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | W5500_left1, W5500_right1 |
| 2 | Conn_01x20_Pin | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | Black_pill_left1, Black_pill_right1 |
| 2 | SR240 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2 |
| 1 | 1000uF | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C6 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 10n | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 470uF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C2 |
| 1 | 470uH | Inductor_THT:L_Radial_D10.0mm_P5.00mm_Neosid_SD12_style3 | L1 |
| 1 | INPUT_VDC | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type055_RT01502HDWU_1x02_P5.00mm_Horizontal | J1 |
| 1 | LM2575-3.3 | Package_TO_SOT_THT:TO-220-5_Vertical | U1 |
| 1 | OUPUTS | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-09P_1x09_P5.00mm | J2 |
| 1 | OUPUTS_OC | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-09P_1x09_P5.00mm | J3 |
| 1 | PWR | Diode_SMD:D_1206_3216Metric | D3 |
| 1 | UDN2981 | Package_DIP:DIP-18_W7.62mm_LongPads | U2 |
| 1 | ULN2803A | Package_DIP:DIP-18_W7.62mm_LongPads | U3 |
Questions
How big is the Lan outlet PCB?
It measures 88 × 78 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lan outlet use?
58 parts, built around the LM2575-3.3WU, UDN2981A-T, ULN2803A and SR240. 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 Lan outlet KiCad files?
From the ra0sms/ethernet-control-console repository on GitHub, at the commit this page was made from: the board is KiCad/lan_outlet/lan_outlet.kicad_pcb and its schematic KiCad/lan_outlet/lan_outlet.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lan outlet design in my own project?
Its repository publishes it under the MIT 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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