ULX3S FPGA Dev Board
Best versatile FPGA platform for makers building connected digital circuits.
The ULX3S is an open-source FPGA development board designed for digital circuit innovation. It features the Lattice ECP5 FPGA and an integrated ESP32 co-processor, enabling Wi-Fi and Bluetooth connectivity for versatile applications. With 56 PMOD-compatible GPIO pins, including 8 analog inputs, it offers extensive I/O capabilities. The board supports low-power modes and can be programmed using the Arduino IDE, making it accessible for both beginners and experienced developers. Expansion boards are available to further enhance its functionality for complex projects.
$155.00
Owner Satisfaction
4.6
/ 5
Category Rank
408
/ 1560
#408 in Development Boards
Price vs Category Average
+77%
Above average
FPGA
5585545512
/ Lattice ECP (LFEU-F, LFEU-F, or LFEU-F)
Who it's for
- Open-source advocates avoiding proprietary vendor software lock-in
- Multimedia developers needing integrated connectivity and storage
- Engineers building RISC-V cores or retro-gaming emulators
Who should skip it
- Beginners requiring structured, centralized learning resources
- Designers building battery-powered or thermally constrained projects
- Professional teams needing guaranteed supply chains and dedicated support
Performance breakdown
FPGA Versatility
The Lattice ECP5 architecture handles complex digital logic with impressive efficiency.
Connectivity Integration
Integrated ESP32 co-processing makes wireless IoT implementation seamless and straightforward.
I/O Expandability
Fifty-six PMOD-compatible pins offer massive flexibility for custom hardware interfacing.
Development Accessibility
Arduino IDE support lowers the barrier for entry into FPGA programming.
Peripheral Ecosystem
Onboard SD storage and digital video output enable standalone project capabilities.
Hardware Openness
Fully open-source design provides complete transparency for advanced custom modifications.
Key Specs
FPGA
Lattice ECP5 (LFE5U-85F, LFE5U-45F, or LFE5U-12F)
RAM
32 MB SDRAM @ 166 MHz
Onboard Flash
16 MB Quad-SPI Flash
Storage
Micro-SD slot
GPIO
56 pins (28 differential pairs)
USB
FTDI FT231XS
Audio
3.5 mm jack
Video
Digital video (GPDI)
Features
- Open-source hardware design
- Integrated ESP32 for co-processing
- Onboard Wi-Fi and Bluetooth
- Low-power sleep mode with RTC
- Versatile I/O with ADC
- PMOD compatible GPIO expansion
- Arduino IDE programming support
- Compact form factor
What customers say
The ULX3S FPGA Dev Board is highly regarded for its exceptional value and commitment to open standards. Users praise the powerful Lattice ECP5 chip and seamless compatibility with open source toolchains like Yosys. Its robust feature set, including integrated SD card and ample I/O, makes it perfect for complex projects like custom RISC-V cores. While the learning curve exists, experienced engineers find the board offers unparalleled performance compared to costly proprietary options. The active, helpful community significantly enhances the user experience, solidifying the ULX3S as the definitive choice for those prioritizing high performance and flexibility within an open ecosystem.
Know before you buy
The ESP32 acts as a co-processor that handles Wi-Fi and Bluetooth connectivity, offloading wireless tasks from the FPGA. This allows you to easily integrate remote control or data logging features into your digital logic projects without needing external modules.
While the board supports Arduino IDE, it is primarily used for programming the ESP32 co-processor. FPGA development typically requires specialized tools like Lattice Diamond or open-source flows like Yosys and Nextpnr to synthesize your hardware designs.
The ULX3S features 8 analog input channels with 12-bit resolution, capable of sampling at 1 MS/s. This makes it well-suited for projects requiring sensor data acquisition alongside high-speed digital processing.
Yes, the board features 56 GPIO pins that are PMOD-compatible. This allows you to easily connect a wide variety of off-the-shelf sensors, displays, and interface modules to expand your project's capabilities.
Yes, the ULX3S includes an onboard Micro-SD card slot. This is ideal for storing large datasets, configuration files, or logging information generated by your FPGA designs.
The board is equipped with a GPDI (General Purpose Digital Interface) port, which allows for digital video output. This is particularly useful for projects involving custom graphics generation or video signal processing.
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