Custom Keyboard Building 101

Don’t you want your new keyboard to be nice and shiny and have a great “thock, thock” sound? Want to be that cool engineer that is noticeably hard at work in the office? Why buy an already built keyboard from amazon or one of those top gaming companies when you can have a totally custom and unique mini project? This is your primer to the world of custom keyboards.

What are my qualifications?

I did a quick deep dive for a few nights, read a bunch of articles, and watched a bunch of youtube of sounds. This is my first custom keyboard. 💀

There are 3 primary choices that need to be made and we’ll go through them in a simplified fashion. I’ll highlight my own personal choice in green and put the full build list near the bottom.

Case

Here is where you set the foundation for your keyboard. In this guide, we’ll talk through one of the more popular keyboard kits, there are definitely ranging options with different brands and costs, but for simplicity sake, we’ll be going over the QwertyKeys keyboard kits, which is considered above average.

Choosing the size

There are many sizes to choose from, from 60% to full size. the % usually refers to the approximate size of the keyboard compared to a full-sized layout

Size Description Number of Switches
60% only includes alphanumerics keys, most common used punctuation, and a few essentials 61
65% essential keys omits number pad and function row 67-68
70% alphanumerics, some function keys, omits number pad 75-80
75% adds more functionality, a function row and more navigation keys 83-87
80% excludes number pad 87-88
Full includes alphanumeric, function keys, navigation keys, and numeric keypad 104-108

🛂 https://www.qwertykeys.com/products/neo75cu [QwertyKeys neo75cu]

Case material

This choice is mainly for looks and weight

Top case options

Anodized Silver Anodized Black Anodized Grey Anodized Navy
Anodized Purple Anodized Burgundy Anodized Green Anodized Grey-gold
Anodized Cornflower Spray-coated Retro White Spray-coated White Spray-coated Cream

🛂 Click through the site and choose a color combination that looks good [Anodized Silver]

Bottom case options

Option Description
Brass
Copper slightly denser than brass, will have more weight

🛂 Can’t go wrong with some density [Copper]

Accent badge look

Silver Orbit Badge Golden Orbit Badge Black Orbit Badge
Silver Nova Badge Golden Nova Badge Black Nova Badge
Silver Vortex Badge Golden Vortex Badge Black Vortex Badge

🛂 Choose something that will match your aesthetic [Silver Orbit Badge]

Printed circuit board (PCB)

Option Description
Solder PCB includes 2 foam fillers for the battery compartment. less likely to break
Wired Hotswap PCB includes 2 stainless steel fillers for the battery compartment to add weight
Tri-mode Hotswap PCB includes 2x 2200mAh batteries, allows for cable, wireless, and bluetooth

🛂 The most durable option will be the solder PCB, but wont allow for wireless connectivity [Tri-mode Hotswap PCB]

Plate

This is a plate that helps to sandwich your switches to the circuit board. It is located between the switch and the PCB, supporting and fixing the switch, reducing the shaking of the switch during use, and protects both the switch and the circuit board. The dense materials provide a stiffer typing experience with basically no flex, have a harsher bottom out, resonate a lot and provide a higher pitch sound profile

Material Description Flexibility Sound
Steel high hardness, heavy feeling, solid sound. common in cheap mechanical keyboards Hard+++ High+++
Copper hardness equivalent to steel, louder sound Hard++ High++
CF (Carbon Fiber) high hardness and light weight, crisp sound Hard+ High+
Brass firm typing feel, balanced responsiveness. deep and resonant sound Hard High
Aluminum high hardness, light weight, dull sound Medium Medium
FR4 (Flame Retardant-4) medium hardness, full toughness, thocky sound. same material as PCB Soft Low
POM (Polyoxymethylene) low hardness, easy to deform, thocky sound. widely used due to popularity Soft+ Low+
PC (Polycarbonate) low hardness, easy to deform, thocky sound. extremely soft feel Soft++ Low++
PP (Polypropylene) soft and bouncy feel. soft and muted sound Soft+++ Low+++

🛂 Balance the “thock” with some crisp sounds [Carbon Fiber]

Switches

There are a ton of switches out there. Each brand has their own style, build material, lots of technical details that we’ll just skip. Decide what sound profile you prefer, listen to a few sound tests and just give it a try. I think milktooth has a great channel that just powers through a lot of switches, if they don’t have the switch you heard about, just give it a quick google; someone, somewhere has done some review on it.

Type Description
Linear simplest. feel the same the moment you start pressing till bottoming out. no tactile feedback or noise when hitting the actuation point
Tactile provide tactile feedback when hitting actuation point. as you press down you will notice a small bump
Clicky provides an additional click sound when hitting actuation point. main advantage is that you dont have to push the key all the way down
Hall Effect use magnetic switches so you can press keys really fast wihtout waiting for them to fully come back up

Switch Types

After a lot of videos, there seemed to be a constant few that would keep popping up, it was overwhelming, so I just chose a popular manufacturer and went deep on them:

Name Technical Details Type Link
Everglide aqua king Actuation force: 46g
Bottom out force: 62g
Total travel: 4mm Linear https://milktooth.com/products/aqua-king
Gateron oil king Actuation force: 55g
Bottom out force: 65g
Total travel: 4mm Linear https://milktooth.com/products/oil-king
Gateron weightlessness Actuation force: 50g
Total travel: 3.4mm Tactile https://milktooth.com/products/weightlessness
Gateron baby kangaroo Actuation force: 59g
Bottom out force: 67g
Total travel: 3.4mm Tactile https://milktooth.com/products/baby-kangaroo
Gateron quinn Actuation force: 59g
Bottom out force: 67g
Total travel: 3.4mm Tactile https://milktooth.com/products/quinn
Gateron long jing Actuation force: 48g
Bottom out force: 55g
Total travel: 4mm Tactile https://milktooth.com/products/longjing
Haimu mulberry Actuation force: 47g
Bottom out force: 55g
Total travel: 3.6mm Tactile https://milktooth.com/products/mulberry
TTC venus Actuation force: 45g
Bottom out force: 52g
Total travel: 3.8mm Linear https://milktooth.com/products/venus
Wuque Studio WS morandi Actuation force: 50g
Bottom out force: 60g
Total travel: 3.5mm Linear https://milktooth.com/products/ws-morandi

https://milktooth.com/products/switches

🛂 When in doubt choose the most popular and trending ones [TTC venus, Everglide aqua king]

⚠️ One other thing to note is key switch stems. most will probably be the cherry mx stem, or mx-compatible, but if you encounter anything else, you should make sure that your switches and key caps are compatible. https://glacierpcgaming.com/blogs/news/understanding-key-switch-stems-why-they-matter-in-keycap-compatibility

You can do your own research, we’ll provide a few interesting youtube links here:

  • https://www.youtube.com/watch?v=PwSQgOugNAs – I built the thockiest keyboard
  • https://www.youtube.com/watch?v=3wAbhS73sWk – Best and worst Gateron switches
  • https://www.youtube.com/watch?v=huhEfYF-lGE – Beast and worst TTC switches

Key Caps

Again there are an overwhelming amount of choice out there; from type of printing, material used, to type of key profile. We’ll go over the main points.

Material

ABS are the cheapest, most common plastic, mass-produced from easily moldable plastic. PBT are less common but usually have higher quality, resistant to wear, providing a longer lifespan.

Pros Cons
ABS smooth surface, affordable, readily available, allow for vibrant printing, found on stock keyboards prone to wear and shine, less durable
PBT durable, resistant to wear and shine, provides premium feel, textured surface for better grip, longer lifespan limited color vibrancy, can be more expensive than ABS
POM smooth and durable, resists wear and oil build up, unique feel, premium typing experience limited availability, may not feature intricate designs
Resin highly customizable with intricate designs, handcrafted, can be translucent can be expensive, limited availability, may not be as durable
Rubber excellent grip and tactile feedback, ideal for gaming and typing, durable and resistant, reduces typing noise limited aesthetic options, not as common, may not be compatible

https://hirosarts.com/blog/different-types-of-keycaps-guide/

Type of Printing

Pros Cons
Pad printing most common method, cost-efficient, variety of colors worst durability, less crisp and sharp legends, not compatible with backlit
Double-shot exceptional durability, high contrast and sharp, allows RGB backlighting limited color options, more expensive
Triple-shot latest evolution of double-shot, more unique color combos limited
Pudding vibrant RGB illumination, affordable, compatible with most often made of ABS, limited tactile or sound improvement
Laser etching precise, detailed, letters impossible to wear off, customizable not as vibrant
Dye sublimation highly resistant to wear and fading, vibrant colors, long lasting, sharp and vibrant legends only works on PBT, non-backlit, limited colors and customization
UV printing various keycap materials, customizable may wear off with extended use

Keycap Profiles

Profiles determine the overall shape and height of your keycaps, directly influencing how they feel under your fingers and how they look on your keyboard.

image.png

Description Height
Cherry angled tops, sculpted rows, balance of comfort and performance 9.4mm
OEM common on pre-built keybaords, angled tops, great for typing, gaming, everyday use 11.9mm
SA angled, concave tops and sculpted rows, not designed for speed 16.5mm
KAT slanted, indented tops and rows, streamlined version of SA 13.5mm
MT3 distinct design with unique angles and sharper corners on the concave tops 16.5mm
GMK CYL original “cherry profile”, ergonomic, cylindrical keys 9.4mm
GMK MTNU medium height spherical top keycap, new standard for spherical tops 10.0mm
DSA low-profile, speedy. concave tops and consistent row shape similar to XDA but shorter 7.6mm
KAM uniform design, all rows same shape and height 19.05mm
XDA flat tops, same height, ideal for fast typing 9.1mm

https://hirosarts.com/blog/guide-to-different-keycap-profiles/

https://hirosarts.com/blog/different-types-of-keycaps-guide/

Overview of Different Keycap Profiles

🛂 It’s always better to have many options [CYL Metropolis R2 – ABS double-shot MTNU Space Cadet – PBT double-shot]

On many forums, GMK is the gold standard of key caps. Other possibilities would be Keychron:

  • https://novelkeys.com/collections/gmk
  • https://mechanicalkeyboards.com/collections/gmk-keycaps
  • https://mechanicalkeyboards.com/collections/keychron-keycaps

Buy List

Name Description Price
CYL metropolis r2 GMK ABS double-shot keycaps – midnight base set $65.00
MTNU space cadet GMK PBT double-shot keycaps – base set $155.00
Everglide aqua king linear switch 1x (10 switches) $5.91
TTC venus linear switch 9x (90 switches) $49.76
Neo75cu anodized silver case $40.00
Neo75cu plate carbon fiber $25.00
Neo75cu PCB tri-mode hotswap PCB $55.00
Neo75cu accent badge silver orbit badge $25.00
Neo75cu bottom case copper bottom $80.00
Neo75cu extras square brass badge $10.00
Total $510.67