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75% Keyboard PCB: Everything You Need to Know

  • 75-keyboard-pcb

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The mechanical keyboard community constantly evolves, with various layouts catering to different preferences and needs. Among these, the 75% layout stands out for its unique balance between space-saving design and functional richness.

This guide sheds light on the 75% Keyboard PCB, elucidating its role, advantages, and why it might be the ideal choice for your next keyboard project.

What is a 75% Keyboard PCB?

A 75% Keyboard PCB is the backbone for the 75% keyboard layout, which strategically combines the compactness of a 60% keyboard with the functionality of a tenkeyless (TKL) design.

This layout typically retains about 75% of the keys found on a full-size keyboard, including the alphanumeric keys, function row, and arrow keys, while omitting the numeric keypad and condensing the navigational keys to save space.

Key Layout and Size Ratios

The standard 75% keyboard features approximately 84 keys, a slight variation depending on the specific model and manufacturer. This arrangement includes:

  • Alphanumeric Keys: The essential letters, numbers, and punctuation for standard typing and computer use.
  • Modifiers: Key modifiers like Shift, Control, Alt, and Windows or Command keys.
  • Function Row: This is a dedicated row for function keys (F1-F12), maintaining accessibility without needing a separate cluster.
  • Arrow Keys: Integrated within the primary key cluster for space efficiency and ease of use.

Key Features of 75% Keyboard PCBs

  • Compact Efficiency: Seventy percent of PCBs offer a compact form factor that retains crucial keyboard functionalities, making them ideal for users seeking a balance between minimalism and productivity.
  • Customization: Many 75% of PCBs support hot-swappable switches, programmable layers, and customizable lighting options, allowing users to tailor their keyboard to their preferences.
  • Ergonomics: The reduced footprint of 75% of keyboards can contribute to a more comfortable typing setup by minimizing unnecessary stretches for keys and creating a closer mouse placement.

Tips for Choosing the Right 75% Keyboard PCB

Choosing the right 75% of the keyboard PCB (Printed Circuit Board) is essential for creating a keyboard that meets your functional needs and aligns with your personal preferences and aesthetic style.

  • Determine Your Budget

Start by setting a clear budget for your PCB and associated components. Prices can vary significantly based on features, quality, and brand. A clear budget will help narrow down your options and focus your search on what's financially feasible.

  • Switch Type

Consider the type of switches you plan to use, as not all PCBs may support every switch type. Whether you prefer tactile, linear, or clicky switches, ensure your PCB is compatible. Also, consider if you want the flexibility of hot-swappable sockets for easy switch replacement without soldering.

  • Build Quality and Materials

A durable PCB made from high-quality materials is crucial for the longevity and reliability of your keyboard. Look for PCBs that are well-reviewed for their build quality and resilience. Materials like fiberglass are commonly used for their durability and resistance to warping.

  • Customization and Programmability

If customization is necessary, look for a PCB that offers programmable layers and customizable vital mappings. PCBs that support popular firmware like QMK or VIA offer extensive options for remapping keys, programming macros, and adjusting settings to suit your preferences.

  • Backlighting and RGB Lighting

Decide whether backlighting is a feature you want in your keyboard. Some PCBs offer single-color backlighting, while others support full RGB lighting with customizable effects.

Lighting is important to your setup, as it can enhance both the aesthetics and functionality of your keyboard.

  • Wireless vs. Wired

Depending on your needs, you can choose between a wireless or wired PCB. Wireless PCBs offer the convenience of a cable-free setup and portability.

At the same time, wired connections provide a more stable and lag-free connection, which is crucial for gaming or intensive typing sessions.

  • Additional Features

Look for PCBs that offer additional features like USB-C connectivity, onboard memory for profile storage, or audio connectivity. These features can enhance your keyboard's usability and versatility.

  • Layout and Key Arrangement

Ensure the PCB supports your specific 75% layout and critical arrangement. Some 75% of PCBs offer slight variations in critical placement or additional keys. The PCB must align with your desired layout for an optimal typing experience.

  • Ergonomics

Consider ergonomic features that might be important to you, such as support for split spacebars or alternate layouts that can offer a more comfortable typing experience. An ergonomically designed PCB can help reduce strain during extended typing sessions.

  • Compatibility

Finally, ensure the PCB is compatible with your chosen case, plate, and keycaps. Compatibility with your operating system and any necessary programming or lighting customization software is also essential.

Check for any compatibility issues before making your purchase to avoid disappointment.

75% Keyboard PCB Applicable Scenarios

  • Gaming: The compact design provides ample mouse space, enhancing gaming setups. Programmable keys add an extra layer of customization for gaming efficiency.
  • Professional Work: The efficiency and reduced size make 75% of keyboards with quality PCBs perfect for professional environments where desk space is at a premium.
  • Travel and Portability: For those who frequently work from different locations, the compact and often lighter 75% keyboards are easy to transport without sacrificing essential functionality.
  • Aesthetics and Minimalism: Users drawn to clean, organized workspaces will appreciate the 75% layout for its balance of aesthetics and functionality, making it a stylish addition to any desk.


The 75% Keyboard PCB is an integral component for anyone looking to build or use a compact yet fully functional keyboard. By understanding its layout, features, and considerations for choosing the right PCB, users can create a personalized typing instrument that aligns with their specific needs, whether for gaming, work, or everyday use.

The 75% layout continues to grow in popularity, offering a practical and visually appealing option in the vast world of mechanical keyboards.

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