4 layers18 × 38 mm
LoFive
Roshan-khatri78/Electronics-Projects-KiCad-
A collection of my KiCad projects and PCB designs. These projects reflect my learning journey in electronics and PCB design.
28 parts2
4 layers35.6 × 17.8 mm
Lofive
mwelling/lofive161RISC-V microcontroller board based on SiFive FE310.
- Size
- 35.6 × 17.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 48
- Pads
- 195
- Tracks, vias
- 445, 83
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Aug 2017
- Updated
- 20 Feb 2026
Overview
Lofive is an open-source printed circuit board by mwelling, from the mwelling/lofive repository on GitHub. It is a 4-layer board of 35.6 × 17.8 mm with 35 parts on 48 nets, routed with 445 tracks and 83 vias.
It is built around the SN74LVC1G07DBV, IS25LP128-JBLE and SPX3819M5-L-1-8, with the SPX3819M5-L-3-3 among its other parts. Its parts include 17 capacitors, 7 resistors, 5 ICs, 2 connectors and 1 switch.
Main components
4
SN74LVC1G07DBV
SOT-23-5-40℃~+125℃ 1 1 1.65V~5.5V 10uA 32mA 4.2ns@3.3V,50pF 74LVC Open-drain Power-off isolation、Level shifting Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers / Drivers
IS25LP128-JBLE
SOIC-8-208mil-40℃~+105℃ 100,000 cycles 10uA 128Mbit 133MHz 2.3V~3.6V 20 Years 800us Hardware write protection、Software write protection、Write enable latch、Power lock protection SPI SOIC-8-208mil NOR FLASH ROHSISSINOR FLASHSPX3819M5-L-1-8
SOT-23-5-40℃~+125℃@(Tj) 1 1.8V 20V 500mA 500mV@(100mA) 5uA 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsSPX3819M5-L-3-3
SOT-23-5-40℃~+85℃@(Ta) 1 20V 3.3V 420mV@(100mA) 500mA 5uA 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdLoFive
- MCU - SiFive Freedom E310 (FE310) 32-bit RV32IMAC processor @ up to 320+ MHz (1.61 DMIPS/MHz)
- Storage - 128-Mbit SPI flash (ISSI IS25LP128)
- Expansion - 2x 14-pin headers with JTAG, GPIO, PWM, I2C, SPI, 2x UART, 5V, 3.3V and GND
- Misc - 1x reset button, 16 MHz crystal
- Power Supply - 5V via pin 1 on header; Operating Voltage: 3.3 V and 1.8 V
- Dimensions - 38 x 18 mm (estimated)
Documentation
Required KiCAD Version
The design requires at least KiCAD 9 to open.
For Debian users check the following issue for installation instructions: Cannot Open PCB Veiw in KiCad Project
License
Copyright 2017-2021 // QWERTY Embedded Design, LLC
Michael Welling mwelling@ieee.org
LoFive is licensed under CERN Open Hardware Licence v1.2
License Information
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C8, C9, C10, C11, C12, C15 |
| 5 | 100K | Resistor_SMD:R_0402_1005Metric | R2, R3, R5, R6, R7 |
| 5 | 10uF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C13, C14, C17 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | FIDUCIAL | lofive:Fiducial_1mm_Dia_2.00mm_Outer_CopperTop | G1, G2 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C16 |
| 1 | 150K | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 16MHz | Crystals_Oscillators_SMD:crystal_FA238-TSX3225 | Y1 |
| 1 | CONN_01X14 | lofive:PinHeader_1x14_P2.54mm_Vertical_Castellated_Left | J2 |
| 1 | CONN_01X14 | lofive:PinHeader_1x14_P2.54mm_Vertical_Castellated_Right | J1 |
| 1 | E310-G002 | Package_DFN_QFN:UQFN-48-1EP_6x6mm_P0.4mm_EP4.45x4.45mm | U1 |
| 1 | IS25LP128-JBLE | Package_SO:SOIJ-8_5.3x5.3mm_P1.27mm | U2 |
| 1 | SN74LVC1G07 | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | SPX3819M5-L-1-8 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | SPX3819M5-L-3-3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_EVQP2 | SW1 |
Questions
How big is the Lofive PCB?
It measures 35.6 × 17.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Lofive use?
35 parts, built around the SN74LVC1G07DBV, IS25LP128-JBLE, SPX3819M5-L-1-8 and SPX3819M5-L-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 Lofive KiCad files?
From the mwelling/lofive repository on GitHub, at the commit this page was made from: the board is lofive.kicad_pcb and its schematic lofive.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lofive design in my own project?
Its repository states no licence, so its author keeps all rights: ask mwelling before reusing the design.
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