How to Build a Keyboard: A Complete Guide to Custom Mechanical Keyboards

Building your own keyboard sounds like a niche hobby — but it's become one of the most popular DIY projects in the tech world, and for good reason. A custom keyboard gives you precise control over how it feels, sounds, and looks. Whether you want a whisper-quiet board for an office or a satisfying clicky setup for gaming, the build process is the same. Here's how it works.

What Does "Building a Keyboard" Actually Mean?

Unlike buying a prebuilt keyboard off the shelf, a custom build means assembling individual components yourself. You're selecting and combining a case, PCB (printed circuit board), switches, stabilizers, keycaps, and sometimes foam or gaskets — then soldering or snapping everything together.

The result is a keyboard tuned specifically to your preferences, which is something no mass-market product can fully replicate.

The Core Components You'll Need

1. The Case

The case is the outer shell of your keyboard. It determines the form factor — how many keys you'll have and the physical footprint of the board.

Common form factors include:

• Full-size (100%) — includes numpad, function row, and navigation cluster
• Tenkeyless (TKL / 80%) — drops the numpad
• 75% — compact but keeps arrow keys and some function keys
• 65% — arrows included, most function keys removed
• 60% — bare minimum; no arrows, no function row

Cases are made from aluminum, polycarbonate, acrylic, or plastic. Material affects both sound profile and weight significantly.

2. The PCB

The PCB is the circuit board that registers your keystrokes. Two things matter most here:

• Hot-swap vs. soldered — A hot-swap PCB lets you insert and remove switches without soldering. A soldered PCB requires a soldering iron but is generally more stable and reliable.
• Layout compatibility — Your PCB must match your case's form factor. Not all PCBs fit all cases, even at the same percentage.

3. Switches 🎛️

Switches are the mechanism under each key. They come in three main types:

Switch choice is deeply personal. The actuation force (measured in grams), travel distance, and sound profile all vary between models. Many builders lube their switches before installation to smooth out the feel and reduce unwanted noise.

4. Stabilizers

Stabilizers (stabs) support larger keys like the spacebar, shift, enter, and backspace. Poor stabilizers are one of the most common causes of a rattly, unsatisfying keyboard.

Screw-in stabilizers are generally preferred over clip-in versions for stability. Lubing and clipping (trimming small plastic feet) is standard practice before installation.

5. Keycaps

Keycaps sit on top of your switches and define the visual identity of your board. Key factors:

• Profile — the shape and height of the cap row by row (Cherry, OEM, SA, DSA, XDA are common profiles)
• Material — PBT keycaps are thicker and more resistant to shine over time; ABS is smoother but can develop a greasy look with use
• Compatibility — keycaps must match your switch stem type (almost universally MX-compatible for custom builds)

The Build Process Step by Step

1. Test your PCB before installing anything — plug it in and use a metal tool or tweezers to short each switch socket, confirming every key registers.
2. Install and lube stabilizers, then screw them into the PCB.
3. Lube and install switches — either solder them to the PCB or press them into hot-swap sockets.
4. Mount the PCB to the case — mounting style (tray, top, gasket, etc.) affects the sound and flex of the finished board.
5. Install keycaps by pressing them onto switch stems.
6. Test again — use a keyboard tester to confirm every key works.

Optional steps like foam layers between the case and PCB, or switch films, can further refine the sound and feel.

What Affects the Difficulty Level

This is where individual situations diverge considerably. The same basic build process plays out very differently depending on a few key variables:

• Soldering vs. hot-swap — Hot-swap is beginner-friendly. Soldering requires practice and the right equipment.
• Budget — Entry-level kits exist for under $100. High-end group buy builds can exceed $500.
• Customization depth — Some builders stop at assembly. Others spend hours modding switches, lubing everything, adding foam, and tuning acoustics.
• Form factor goals — A 60% build has fewer keys to manage than a full-size, making it physically simpler despite being functionally more complex (you'll need to program layers).

🔧 Tools commonly needed: soldering iron (if not hot-swap), desoldering pump, switch opener, lubricant (Krytox 205g0 for linears is widely used), brushes, and a keycap puller.

Sound Profiles and What Shapes Them

One of the most discussed aspects of custom keyboards is how they sound. The finished acoustic profile is the combined result of:

• Case material and mounting style
• Switch type and lubing
• Foam and dampening layers
• Desk surface and typing angle
• Keycap profile and material

A gasket-mounted polycarbonate case with lubed linears will sound completely different from a tray-mounted aluminum case with stock clicky switches — even if every other decision was identical.

The Variables That Make Every Build Different

There's no universal "best" keyboard build because the right choices depend entirely on factors specific to you: how heavily you type, where you use the board, your sensitivity to sound, the layout your workflow requires, and how much time and budget you're willing to put in. A first-time builder with a hot-swap kit and $80 to spend is starting from a very different place than someone with soldering experience chasing a specific sound signature.

Understanding how each component contributes to the final product is the real foundation — what you do with that knowledge comes down to your own setup and what you're actually trying to build.