2 layers326.7 × 132.3 mm
Auth75
Lumethra/Auth75
This is a 75% keyboard with a fingerprint sensor. What? A fingerprint sensor in a keyboard? Yes, you've heard it right! This keyboard includes a working fingerprint sensor.
232 parts1
2 layers20.1 × 62.5 mm
ESP USB
Lumethra/ESP-USB- Size
- 20.1 × 62.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 64
- Pads
- 174
- Tracks, vias
- 287, 31
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jun 2026
- Updated
- 13 Jun 2026
Overview
ESP USB is an open-source printed circuit board by Lumethra, from the Lumethra/ESP-USB repository on GitHub. It is a 2-layer board of 20.1 × 62.5 mm with 40 parts on 64 nets, routed with 287 tracks and 31 vias.
It is built around the ESP32-S3-WROOM-1-N16R8, MT3608 and 74LVC1G3157DW-7-JSM, with the AMS1117-3.3, DW01A and MCP73831T-2ACI/OT-HXY among its other parts. Its parts include 12 resistors, 7 capacitors, 7 ICs, 3 diodes and 2 switches. It belongs with the ESP32 boards of this library.
Main components
10
ESP32-S3-WROOM-1-N16R8
SMD,25.5x18mm-103.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA ESP32-S3R8 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC Converters
74LVC1G3157DW-7-JSM
SOT-363SOT-363 Analog Switches, Multiplexers ROHSJSMSEMIAnalog Switches, Multiplexers
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsDW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery Management
MCP73831T-2ACI/OT-HXY
SOT-23-5LBattery ManagementHXY MOSFETFS8205A
SOT-23-6-55℃~+150℃ 1.2V 1.5W 2 N-Channel 20V 31.5mΩ@2.5V 466pF 5.7nC@4.5V 58pF 65pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETs
S2B-PH-SM4-TB(LF)(SN)
SMD,P=2mm,卧贴-25℃~+85℃ 1 100V 1x2P 2 2A 2P 2mm 5.5mm 7.9mm 8.6mm Auxiliary Solder Pin Beige Copper alloy PA PH Surface Mount, Right Angle Tin UL94V-0 SMD,P=2mm,卧贴 Wire To Board Connector ROHSJSTWire To Board ConnectorUSB-212-BCW
SMD-20℃~+70℃ 1 1.5A 18.8mm 30V 4P 5,000 cycles Black Male Surface Mount, Right Angle Type-A USB 2.0 SMD USB Connectors ROHSXUNPUUSB Connectors
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
PCB_V3/README.mdV3
Changes:
- adding USB-A
- changing to a cheaper RGB-LED
- meaning you can try solder the wroom yourself and get economics PCBAParts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R4, R6, R13 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1, TP2, TP3, TP4 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric | R8, R9, R10 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C9, C10 |
| 2 | 56k | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 74LVC1G3157DW-7 | easyeda2kicad:SOT-363-6_L2.2-W1.3-P0.65-LS2.1-BL | U2, U3 |
| 2 | D_Schottky | Diode_SMD:D_SMA | D2, D3 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 4.7uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | AMS1117-3.3 | easyeda2kicad:SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR | U7 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_1TS009xxxx-xxxx-xxxx_6x6x5mm | SW2 |
| 1 | DW01A_C351410 | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U4 |
| 1 | ESP32-S3-WROOM-1 | easyeda2kicad:WIRELM-SMD_ESP32-S3-WROOM-1 | U1 |
| 1 | FS8205A_C2830320 | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | Q1 |
| 1 | MCP73831T-2ACI/OT | easyeda2kicad:SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BL | U5 |
| 1 | MT3608 | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U6 |
| 1 | RST | Button_Switch_SMD:SW_Push_1TS009xxxx-xxxx-xxxx_6x6x5mm | SW1 |
| 1 | S2B-PH-SM4-TB | easyeda2kicad:CONN-SMD_P2.00_S2B-PH-SM4-TB-LF-SN | CN1 |
| 1 | TYPE-C 16PIN 2MD | easyeda2kicad:USB-C-SMD_TYPE-C-6PIN-2MD-073 | USB1 |
| 1 | USB-212-BCW | easyeda2kicad:USB-A-SMD_USB-212-BCW | USB2 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1 |
Questions
How big is the ESP USB PCB?
It measures 20.1 × 62.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ESP USB use?
40 parts, built around the ESP32-S3-WROOM-1-N16R8, MT3608, 74LVC1G3157DW-7-JSM and AMS1117-3.3. 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 ESP USB KiCad files?
From the Lumethra/ESP-USB repository on GitHub, at the commit this page was made from: the board is PCB_V3/ESP-USB.kicad_pcb and its schematic PCB_V1/ESP-USB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESP USB design in my own project?
Its repository states no licence, so its author keeps all rights: ask Lumethra before reusing the design.
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