0xCB Pluto
Best ultra-slim controller for custom mechanical keyboard enthusiasts.
The 0xCB Pluto is a compact, custom PCB designed as a direct replacement for Pro Micro or Elite-C controllers in keyboards. It boasts one of the slimmest footprints available, thanks to its true mid-mount USB-C port, and offers comprehensive ESD protection. This controller exposes all usable ATMEGA32U4 pins, including D+ and D- for optional USB daughterboard connections. Each unit is hand-assembled by 0xCB, featuring an ENIG finish and a unique design with visible traces on the back.
$22.00
Owner Satisfaction
4.8
/ 5
Category Rank
3
/ 1541
#3 in Development Boards
Price vs Category Average
-75%
Below average
Who it's for
- Keyboard enthusiasts seeking diverse layout options and custom configurations
- Power users needing intuitive, real-time key mapping and macro control
- Switch collectors wanting to experiment without soldering hardware
Who should skip it
- Budget-conscious buyers looking for immediate, affordable availability
- Builders wanting universal compatibility with standard 60% cases
- Users requiring wireless freedom for a clean, cable-free desk setup
Performance breakdown
Form Factor Efficiency
Mid-mount USB-C design achieves the slimmest profile currently on the market.
Pin Accessibility
Exposes every usable ATMEGA32U4 pin for maximum custom keyboard layout flexibility.
Build Integrity
Hand-assembled quality with a durable ENIG finish ensures long-term reliability.
Circuit Protection
Integrated ESD protection provides essential safety against static discharge damage.
Connectivity Versatility
D+ and D- pin exposure allows for seamless USB daughterboard integration.
Aesthetic Craftsmanship
Visible traces and unique design elevate the board beyond standard industrial components.
Key Specs
Controller based on ATMEGA32U4
Connection Interface
USB-C
Port Type
True mid-mount USB-C
PCB Finish
ENIG (Electroless Nickel Immersion Gold)
Solder Used
Lead-free
Hardware Configuration
Uses SPLIT_USB_DETECT
Exposed Pins
All usable pins of ATMEGA32U4, including D+ and D-
Assembly
Hand-assembled by 0xCB
Features
- Slimmest controller footprint available
- Full ESD protection for reliability
- Exposes all ATMEGA32U4 pins
- Supports USB daughterboard connection
- True mid-mount USB-C port
- Hand-assembled for quality
- Visually distinct back design
- Extra exposed pin compared to Elite-C
What customers say
Enthusiasts widely regard the 0xCB Pluto as a benchmark for premium compact kits, primarily due to its exceptional build quality and superior typing experience. Customers consistently praise the flawless CNC machining and the substantial feel of the aluminum chassis. The gasket mounting system delivers a soft, resonant, and acoustically pleasing sound profile that defines its refined typing feel. Aesthetically, the design is considered clean and elegant. While the high price and group buy wait times present barriers, most reviewers agree that the resulting quality and superior performance justify the investment. The Pluto is viewed as an endgame keyboard and a triumph of high-end design, overshadowing minor assembly complexities.
Know before you buy
Yes, the Pluto is designed as a direct replacement for both Pro Micro and Elite-C controllers. Its compact footprint and pin layout ensure it fits into most keyboard builds that utilize these standard controllers.
The true mid-mount USB-C port allows the controller to sit significantly lower on the PCB. This results in the slimmest possible profile, which is ideal for low-profile keyboard cases or builds where vertical clearance is limited.
Yes, the Pluto exposes all usable ATMEGA32U4 pins, including the D+ and D- lines. This allows you to easily connect an external USB daughterboard if your specific case or layout requires it.
The Pluto offers an extra exposed pin compared to the standard Elite-C. This provides slightly more flexibility for custom wiring or additional hardware features in your keyboard project.
Yes, the Pluto includes comprehensive ESD protection integrated into the design. This helps safeguard the controller from static discharge, increasing the overall reliability and longevity of your keyboard.
The Pluto is configured to use SPLIT_USB_DETECT. When setting up your firmware, ensure your configuration reflects this to ensure proper communication between the controller and your keyboard matrix.
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$22