4 layers95 × 95 mm
Esp32 wled controller
hackclub/OnBoard
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84 parts915
4 layers97.5 × 99.9 mm
Esp32 wled controller
fellettigiacomo/esp32-WLED-4ch-controller16Open source 4 Channel esp32-powered WLED controller with 4 relays and built in level shifter
- Size
- 97.5 × 99.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 100
- Nets
- 116
- Pads
- 361
- Tracks, vias
- 248, 20
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Feb 2024
- Updated
- 13 Feb 2026
Overview
Esp32 wled controller is an open-source printed circuit board by fellettigiacomo, from the fellettigiacomo/esp32-WLED-4ch-controller repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 4-layer board of 97.5 × 99.9 mm with 100 parts on 116 nets, routed with 248 tracks and 20 vias.
It is built around the ESP32-S3FH4R2, SN74AHCT125PWRE4 and EL817, with the USBLC6-2P6, M7 and SRD-05VDC-SL-C among its other parts. Its parts include 26 capacitors, 21 resistors, 9 ICs, 7 switches and 6 diodes. It belongs with the home automation and IoT boards and the ESP32 boards of this library.
Main components
10
ESP32-S3FH4R2
QFN-56(7x7)-104.5dBm -40℃~+85℃ 2.4GHz 21dBm 340mA 3V~3.6V 88mA Bluetooth5.0 LX7 Chip UART、SDIO、SPI、I2C、JTAG QFN-56(7x7) WiFi Modules ROHSEspressif SystemsWiFi Modules
SN74AHCT125PWRE4
TSSOP-14-40℃~+85℃ 1 20uA 4 4.5V~5.5V 74AHCT 8.5ns@5V,50pF 8mA 8mA Tri-State Unidirectional TSSOP-14 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
EL817
DIP-4-55℃~+110℃ 1 1.2V 100mV@20mA,1mA 18us 18us 5.8mA 50% 50V 5kV 600% 9V Phototransistor DIP-4 Transistor, Photovoltaic Output Optoisolators ROHSEverlight ElectronicsTransistor, Photovoltaic Output Optoisolators
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
M7
SMA(DO-214AC)-55℃~+150℃ 1.1V@1A 1A 1kV 30A 5uA@1000V Independent SMA(DO-214AC) Diodes - General Purpose ROHShongjiachengDiodes - General Purpose
SRD-05VDC-SL-C
插件,19.2x15.6mm100mΩ 10ms 10ms 15A 250V@AC 360mW 5 5V 70Ω Non-Polarized - Single Coil One set changeover: 1C (SPDT - changeover) 插件,19.2x15.6mm Power Relays ROHS松乐Power Relays
SS8050
SOT-323-55℃~+150℃ 1 NPN 1.5A 100MHz 100nA 200 25V 300mW 500mV 5V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
CG0603MLU-24E
0603-40℃~+125℃ 0.05pF 1 24V 25V 5nA Bidirectional ESD IEC 61000-4-2 0603 ESD and Surge Protection (TVS/ESD) ROHSBournsVaristors
ECS-400-10-37B2-CKM-TR
SMD2016-4P-20℃~+70℃ 10pF 40MHz 40Ω ±10ppm ±10ppm SMD2016-4P Crystals ROHSECSCrystals
PMEG6020AELRX
SOD-123W-65℃~+150℃ 2A 60V 670mV@2A 700nA@60V Independent SOD-123W Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdesp32-WLED-4ch-controller
Hardware design for a 4 channel WLED controller with built in relays for power saving and level shifter for better signal integrity with long data cables.
⚠️ Warning: Unfortunately, this release is not yet ready for production. There are still issues with the esp32 signal stability and the ESP module is not supported by WLED. I fully intend to complete this project once I have finished the other projects I am currently working on. ⚠️
Manufacturing
I tried to make this board as cheap as possibile using JLCPCB basics part for PCBA, however, since there are many extended parts the final cost should be around 25$/board + shipping
All parts should be compatible with the JLCPCB assembly, otherwise, feel free to send me a pull request.
Looking for a cheaper alternative? i've uploaded a version of the board without the esp32 related hardware, with the headers to plug a whole dev-kit, saving out on extended parts.
Compatibility and capabilites
This PCB supports up to 4 addressable led strips:
Only strips that works with 5V are compatible.
Compatible strips: WS2811 - WS2812B - TM1829 (and other with 5V, DATA, GND). Check the wled wiki for more info
The board allows for a maximum current of around 100W (20A) max. Maximum current for a single relay is 10A (50W)
Flashing
To flash the firmware, follow these steps:
- connect via USB-C or with serial UART (use test points TX, RX, 3.3V, GND)
- use the WLED web installer powered by Esp Web Tools at https://install.wled.me/
- connect to serial port and flash
- after installing, connect to the address provided from the web installer, or connect to the WLED AP
- done! enjoy your addressable IoT leds :D
Licence
CERN Open Hardware License - S (CERN-OHL-S)
Parts
100| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R13, R14, R15, R16, R17, R18, R19 |
| 6 | 0.1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C17, C19, C22, C31, C32, C33 |
| 6 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C5, C6, C7, C15, C23, C34 |
| 5 | 100nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C2, C3, C4, C9 |
| 5 | RED_LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | PWR, RELAY1, RELAY2, RELAY3, RELAY4 |
| 4 | 100R | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R20, R21, R22, R23 |
| 4 | 10A Fuse | Fuse:Fuseholder_Blade_Mini_Keystone_3568 | F1, F2, F3, F4 |
| 4 | C7420350 | Diode_SMD:D_MELF_Handsoldering | D1, D2, D3, D9 |
| 4 | EL817 | lib:OPTO-SMD-4_L4.6-W6.5-P2.54-LS10.3-TL | U4, U5, U6, U7 |
| 4 | SRD-05VDC-SL-C | lib:RELAY_SRD-05VDC-SL-C | K1, K2, K3, K4 |
| 4 | SS8050 | Package_TO_SOT_SMD:SOT-23 | Q3, Q4, Q5, Q6 |
| 4 | Screw_Terminal_01x03 | lib:CONN-TH_3P-P5.00_KF301-5.0-3P | J2, J3, J4, J5 |
| 3 | 1K | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R6, R7 |
| 3 | MountingHole | MountingHole:MountingHole_2.5mm_Pad | H6, H7, H8 |
| 3 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2, JP3 |
| 2 | 12pF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C28, C29 |
| 2 | 5K1 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R25, R28 |
| 2 | SW_SPST | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1, SW2 |
| 1 | 10nF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C21 |
| 1 | 10uF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C14 |
| 1 | 162k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 1uF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C16 |
| 1 | 2.2uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C18 |
| 1 | 2.4nH | Inductor_SMD:L_0201_0603Metric | L4 |
| 1 | 2.7pF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C30 |
| 1 | 22 | Resistor_SMD:R_0402_1005Metric | R24 |
| 1 | 22.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 2nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 3pF | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C36 |
| 1 | 47uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C8 |
| 1 | 499 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | 6.8uH | lib:IND-SMD_L4.4-W4.2 | L3 |
| 1 | ANT | RF_Antenna:Texas_SWRA117D_2.4GHz_Left | AE2 |
| 1 | CG0603MLU-24E | lib:R0603 | D5 |
| 1 | ECS-400-10-37B2-CKM-TR | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | ESP32-S3FH4R2 | lib:QFN40P700X700X90-57N | U1 |
| 1 | LMR51430 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | PMEG6020AELR | Diode_SMD:Nexperia_CFP3_SOD-123W | D4 |
| 1 | SN74AHCT125PWR | lib:SOP65P640X120-14N | U9 |
| 1 | SS12D10G4 071 | lib:SW-TH_SHOU-HAN_SS12D10G4 | SW3 |
| 1 | TLV76733DRVx | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | U11 |
| 1 | USBLC6-2P6 | Package_TO_SOT_SMD:SOT-666 | U10 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | USB-C |
| 1 | VBUS_INPUT1 | lib:CONN-TH_P5.00_KF301-5.0-2P | J6 |
| 1 | VBUS_INPUT2 | lib:CONN-TH_P5.00_KF301-5.0-2P | J7 |
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Questions
How big is the Esp32 wled controller PCB?
It measures 97.5 × 99.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Esp32 wled controller use?
100 parts, built around the ESP32-S3FH4R2, SN74AHCT125PWRE4, EL817 and USBLC6-2P6. 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 Esp32 wled controller KiCad files?
From the fellettigiacomo/esp32-WLED-4ch-controller repository on GitHub, at the commit this page was made from: the board is esp32_wled_controller.kicad_pcb and its schematic esp32_wled_controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp32 wled controller design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).