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

The total cost will be a bit over $124 including PCB, shipping, and filament.