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my dream 75% keeb! made through hack club blueprint!

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Brew75

blah blah brew_case_variant_2026-Mar-29_04-31-40PM-000_CustomizedView17610038406

made as part of Hack Club's Blueprint! Check out my full journal and design process here!

my dream keyboard!

This is a 75% keyboard, powered with QMK and like 6 months of procrastination lmao
I started this project to create my dream keyboard back in the start of Blueprint, and I finally get to finish off this project after months of school work and robotics work getting in the way. After getting experience from my other keyboard-related projects, I wanted to tackle on an actual keyboard project that I could customize to my liking and use as my daily driver. Although I easy could've bought some off the shelf keyboard, buying a mechanical keyboard for $80 dollars would very much bankrupt me

This keyboard contains:

  • 82 total keys with 4 macro keys included!
  • 2 clicky knobs for extra customization (or just fidgeting with)
  • glowy RGB through the top and underglow!
  • an OLED screen for showing statistics and cool graphics!
  • integrated USB hub, supporting 4 connecting devices!
  • awesome custom silkscreen!

I'm overall very happy how this project turned out. Art-wise, this is my favorite project so far, with the PCB having 100% original silkscreen designs with the back paying homage to all my previous projects!

how 2 use this

its a keyboard where you go click clack on it
This is a standard 75% keyboard with 4 moddable macro buttons on the side and 2 knobs with switches! Tweak their functions in the firmware with QMK (located in PCB/keymaps/brewin/keymap.c)
You can also use the usb hub, loctaed on the top of the keyboard next to the microcontroller! plug your pc into the micro USB slot and add any accessories to the other usb A ports!

anyways funky picture time

CAD

 blah blh 0af0a9d3-2f9b-4d00-926a-b091d3ac0b0e
blah blah brew_case_variant_2026-Mar-29_05-25-08PM-000_CustomizedView47794534940
blah blah brew_case_variant_2026-Mar-29_05-58-51PM-000_CustomizedView23646689068
blah blah brew_case_variant_2026-Mar-29_04-30-02PM-000_CustomizedView20381174148
image
image

PCB + Schematics

schematic
pcb designer
aura 3d model pic
aura 3d model pic 2
aura 3d model pic 2

BOM

part name quantity purpose Shown Price Actual Cost (Tax + Shipping) link
Gateron Cherry MX Switches 82 Keyswitches that are pressed $5.03 $5.03 link here
EC11 Rotary Encoders 2 Rotary knobs for incrementing items, macros $1.37 $0 (Already owned) link here
SK6812 LEDs 5050 22 RGB LEDs to light up the keyboard $5.70 $0 (Already owned) link here
0.91 OLED Display 1 Display graphics and information $2.21 $0 (Already owned) link here
Raspberry Pi Pico 1 Main microcontroller $0.99 $0 (Already owned) link here
1N4148 Diodes 85 Organizes rows and columns for microcontroller $1.23 $1.23 link here
Case (3D print) 1 Full, 4 Pieces Holds the plate, style 3D Printed $0 (Will 3D print myself)
Plate (3D print) 1 Full, 2 Pieces Holds the PCB, gives sound 3D Printed $0 (Will 3D print myself)
PCB 1 Holds components and wires them $42.16 $42.16
USB A Female Connectors 5 Connectors for built in USB hub $3.08 $3.08 link here
Capacitors 7 Required for USB hub circuit $3.13 $3.13 link here
SL2.1A IC 1 IC used for USB hub $1.75 $1.75 link here
6.00u Stabilizers 1 Stabilizes the space bar $5.56 $5.56 link here
2.00u Stabilizers 4 Stabilizes both shift keys, enter, and backspace Included w/ Above Included w/ Above
75% Keycaps 1 Set Covers keyswitches $15.16 $15.16 link here
Rotary Encoder Knobs 2 Covers the encoders 3D Printed $0 (Will 3D print myself)
#8-32 1/2" Screws 6 Assembles the case and plate $2.22 $0 (Already Owned) link here
Micro USB Female Connector 1 Input USB for USB hub $2.78 $2.78 link here

Actual Total Cost (Tax + Shipping): $87.38

dedicated to richard tu
happy birthday, friend.

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my dream 75% keeb! made through hack club blueprint!

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