Carpe Keyboards JD40 PCB Mk. II
Best programmable foundation for custom 40% mechanical keyboard enthusiasts.
This is the ultimate foundation for a minimalist 40% build that demands total layout control. You will have to break out the soldering iron and navigate the quirks of a Micro USB connection, but the payoff is a bespoke, fully programmable board that fits anywhere.
$32.00
at
Mechanical Keyboards
Who it's for
- Power users needing deep customization for compact layouts
- Keyboard builders committed to the JD40 ecosystem
- Enthusiasts prioritizing modern, reliable USB-C connectivity
Who should skip it
- Typists accustomed to full-size or TKL layouts
- Budget-conscious buyers seeking immediate, accessible availability
- Beginners avoiding the time commitment of manual soldering
Performance breakdown
Assembly Accessibility
Solder-only connection requires steady hands and basic electronics assembly experience.
Connectivity Modernity
Micro USB interface feels dated compared to modern USB-C standards.
Form Factor Efficiency
Optimized 40% layout maximizes desk space for minimalist workstation setups.
Firmware Flexibility
PlatformIO support provides a robust environment for advanced custom firmware development.
Customization Depth
Easy AVR firmware offers granular control for complex keymap configurations.
Build Compatibility
South-facing orientation ensures broad compatibility with various aftermarket keycap profiles.
Key Specs
Model
JD40PCB
Switch Count
41
Interface
Micro USB
Switch Connection
Solder
Switch Direction
South Facing
Size
40% Micro
Microcontroller
ATmega328P
Power Source
USB
Programming Interface
Bootloader via USB
Development Environment Support
PlatformIO
Know before you buy
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