Story
KB75 -- A open-source 75% Keyboard
This is a 75% mechanical keyboard that has per-key rgb, hotswappable keys, an OLED, and a rotary encoder. It's based on the Raspberry Pi Pico so it supports QMK and KMK.
I decided to make this because I love mechanical keyboards but the one I was using broke. And keebs over here just don't got much variety or they are low quality, so I decided to make my own.
Features:
- Open Source
- Hotswappable
- Per-key SK6812MINI-E RGB Backlight
- A rotary encoder
- 75% Layout
- 0.91" Vertical OLED
- Easy to program (depends from person to person)
- QMK and KMK both are supported
- 3D Printed / CNC Case and plate
Images:
Schematic:
PCB:
Case and Plate:
Bill Of Materials
Here's my BOM:
| Item | Quantity | MOQ | LCSC # | Price |
|---|---|---|---|---|
| 0805 Capacitors 100nf | 82 | 100 | C49678 | $0.44 |
| 0805 Resistors 10K ohm | 2 | 100 | C84376 | $0.19 |
| 0805 Diodes | 83 | Multiples of 50 | C82544 | $2.7 |
| Kailh MX Sockets | 82 | Multiples of 10, 30, 70, or 110 | CPG151101S11 | $9.15 |
| Raspberry Pi Pico | 1 | 1 | Raspberry Pi Pico | $1.50 |
| SK6812MINI-E | 82 | Multiples of 5 | C5149201 | $5.02 |
| MX Style Stabilizers | 1 Kit | - | Gateron Stabs | $11.21 |
| 0.91" OLED White | 1 | 5 | 0.91" OLED | $8.86 |
| Si2318CDS-T1-GE3 | 1 | 5 | C14498 | $0.56 |
| MX Style Keycaps | 1 Set | - | Keycaps | $11.85 |
| MX Switches | 82 | Multiples of 10 | Switches | $41.99 |
| EC11 Encoder | 1 | 5 | Encoder | $3.06 |
| EC11 Encoder Knob | 1 | 1 | Knob | $1.18 |
| 74AHCT125 | 1 | 5 | C148198 | $1.12 |
