iCEBreaker Bitsy
Best compact FPGA board for open-source hardware prototyping.
The iCEBreaker Bitsy is a compact, open-source FPGA development board powered by the Lattice iCE40UP5k. Its versatile Teensy form factor allows for easy breadboard integration or use as an SMD module, making it ideal for educational purposes and rapid prototyping. This board fully supports the open-source toolchain, offering accessible FPGA development. It features 16MB of QSPI flash and 8MB of PSRAM for ample storage, 24 GPIO pins, and a USB-C interface for programming and power. Designed for low-power applications, it also supports soft-cores like PicoRV32.
$42.00
Owner Satisfaction
4.6
/ 5
Category Rank
407
/ 1545
#407 in Development Boards
Price vs Category Average
-52%
Below average
FPGA
4055280
/ Lattice iCEUPk with logic cells
Who it's for
- Developers preferring transparent, license-free software ecosystems
- Engineers building space-constrained projects or portable hardware
- Makers wanting streamlined, all-in-one debugging setups
Who should skip it
- Designers needing high-capacity logic for complex processing
- Prototypers requiring extensive connectivity for multiple external peripherals
- Novices intimidated by command-line interfaces and community-driven documentation
Performance breakdown
Toolchain Accessibility
Full open-source support makes FPGA development approachable for every skill level.
Prototyping Versatility
The Teensy form factor transitions perfectly from breadboard to final production.
Memory Capacity
Generous flash and PSRAM storage handle complex soft-core designs with ease.
I/O Flexibility
Twenty-four GPIO pins provide ample connectivity for most embedded hardware projects.
Power Efficiency
Optimized for low-power operation, ideal for battery-operated portable FPGA applications.
Physical Interface
Modern USB-C connectivity ensures reliable power and rapid programming cycles.
Key Specs
FPGA
Lattice iCE40UP5k with 5280 logic cells
Storage
16MB QSPI-DDR flash
Storage
8MB QSPI pseudo SRAM (PSRAM)
I/O
24 General-Purpose I/O pins
PWM Channels
3
Clock Speed
48 MHz
Form Factor
Teensy form factor, Breadboard friendly
Programming Interface
DFU bootloader via USB
Features
- Compact and open-source FPGA board
- Breadboard-friendly Teensy form factor
- Supports open-source toolchains
- Ample onboard flash and PSRAM storage
- 24 versatile GPIO pins
- Low power consumption for battery use
- FPGA-controlled RGB LED
- USB-C for programming and power
What customers say
The iCEBreaker Bitsy earns high praise as an excellent, accessible entry point into FPGAs, strongly favored by open-source enthusiasts. Customers consistently highlight its incredibly compact, breadboard friendly design, perfect for small projects. A key benefit is seamless compatibility with the open-source Project IceStorm toolchain, which greatly simplifies the development process compared to proprietary software. The integrated USB C connector enhances ease of use, offering a true plug and play experience. Despite its small size, users find the build quality robust and reliable for learning digital logic. Overall, the Bitsy is viewed as a fantastic value proposition that democratizes FPGA technology through its commitment to open standards and user friendly design.
Know before you buy
Yes, the board is designed specifically to work with the fully open-source FPGA toolchain, including Yosys, Nextpnr, and Icestorm, making it an excellent choice for developers who prefer an open ecosystem.
Absolutely. The iCEBreaker Bitsy utilizes the popular Teensy form factor, which is breadboard-friendly and allows for quick prototyping without needing custom PCBs.
The board is well-equipped for complex designs with 16MB of QSPI flash for storage and 8MB of PSRAM, providing enough headroom for soft-cores like PicoRV32 and data-intensive applications.
You can program the iCEBreaker Bitsy via its USB-C port using the integrated DFU bootloader, which simplifies the development workflow by eliminating the need for external programmers.
Yes, the Lattice iCE40UP5k FPGA is known for its low power consumption, making the Bitsy a strong candidate for portable or battery-operated hardware designs.
Yes, it features an FPGA-controlled RGB LED, two status indicator LEDs, and a physical pushbutton, which are helpful for debugging and testing your logic designs immediately.
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$42