HardLabs

Keyboard75

shreejita56·Keyboard75·PCB/KEYBOARD75.kicad_pcb

Keyboard75 PCB layout, top view — open source RP2040/RP2350 board by shreejita56

About the Keyboard75 PCB

Keyboard75 is an open source RP2040/RP2350 PCB design by shreejita56, published on GitHub. It is a 2-layer board measuring 315.9 × 124.1 mm, with 360 components from 103 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the MCP1700X-330XXTT and W25Q16JVUXIQ TR. By type, the board carries 93 capacitors, 85 switches, 83 diodes, 82 LEDs, 8 resistors and 3 ICs.

It belongs with the keyboards designs in this gallery.

From the project

SO I made a custom 75 % layout Mechanical keyboard which has a rotor encoder at the top for brightness controlee as well . It is based on rp2040 chip . SO I had to design the MCU circuit by myself as well . The PCB was designed on kicad and CAD was done on Fusion . firmware was w

SO I made a custom 75 % layout Mechanical keyboard which has a rotor encoder at the top for brightness controlee as well . It is based on rp2040 chip . SO I had to design the MCU circuit by myself as well . The PCB was designed on kicad and CAD was done on Fusion . firmware was written in VS-Code. It has a very compact design. The Keyboard also includes per switch LED and diodes to prevent ghosting. It connects to the PC via USB-C input .

Keyboard75, from the project README
From the project README

Main components on the Keyboard75

RP2040MCP1700X-330XXTTW25Q16JVUXIQ TR

Keyboard75 bill of materials (BOM)

360 components, 103 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
MCP1700X-330XXTT
MCP1700x-330xxTT
U2
1
W25Q16JVUXIQ TR
U4
1
12 MHz
Y1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
3
MountingHole
ST28, ST57, ST59
1
MountingHole
ST76
1
ESC
SW1
1
F1
SW2
1
F2
SW3
1
F3
SW4
1
F4
SW5
1
F5
SW6
1
F6
SW7
1
F7
SW8
1
F8
SW9
1
F9
SW10
1
F10
SW11
1
F11
SW12
1
F12
SW13
Show 83 more
QtyPartRefs
1
Delete
SW14
1
`
SW15
1
1
SW16
1
2
SW17
1
3
SW18
1
4
SW19
1
5
SW20
1
6
SW21
1
7
SW22
1
8
SW23
1
9
SW24
1
0
SW25
1
-
SW26
1
+
SW27
1
Backspace
SW28
1
Home
SW29
1
Tab
SW30
1
Q
SW31
1
W
SW32
1
E
SW33
1
R
SW34
1
T
SW35
1
Y
SW36
1
U
SW37
1
I
SW38
1
O
SW39
1
P
SW40
1
[
SW41
1
]
SW42
1
\
SW43
1
Pg Up
SW44
1
Caps Lock
SW45
1
A
SW46
1
S
SW47
1
D
SW48
1
F
SW49
1
G
SW50
1
H
SW51
1
J
SW52
1
K
SW53
1
L
SW54
1
;
SW55
1
"
SW56
1
Enter
SW57
1
Pg Dn
SW58
1
L Shift
SW59
1
Z
SW60
1
X
SW61
1
C
SW62
1
V
SW63
1
B
SW64
1
N
SW65
1
M
SW66
1
,
SW67
1
.
SW68
1
/
SW69
1
R Shift
SW70
1
Up Arrow
SW71
1
End
SW72
1
L Ctrl
SW73
1
Win
SW74
2
Alt
SW75, SW77
1
Space
SW76
1
Fn
SW78
1
R Ctrl
SW79
1
Left Arrow
SW80
1
Down Arrow
SW81
1
Right Arrow
SW82
1
RotaryEncoder_Switch_MP
SW83
2
SW_Push
SW84, SW85
1
C
LED1
81
~
LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9 +73
83
D
D1, D2, D3, D4, D5, D6, D7, D8 +75
82
0.1 uf
C1, C2, C3, C4, C5, C6, C7, C8 +74
2
33PF
33pF
C83, C84
3
0.1UF
0.1uF
C86, C88, C92
2
10UF
10uF
C87, C91
2
1UF
1uF
C94, C98
2
100 nf
C95, C97
2
5.1K
R3, R4
2
1K
R5, R6
2
10K
R7, R14
2
27 ohn
R8, R9

Keyboard75 design files

The KiCad project lives in the shreejita56/Keyboard75 repository on GitHub; these links point at the commit this page was built from.

Keyboard75: common questions

What microcontroller does the Keyboard75 use?

The Keyboard75 is built around the RP2040, from the RP2040/RP2350 family.

How big is the Keyboard75 PCB?

The Keyboard75 measures 315.9 × 124.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard75?

360 components, from 103 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Keyboard75 design files?

From the shreejita56/Keyboard75 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Keyboard75 design in my own project?

The repository has no license, so all rights stay with shreejita56. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Keyboard75 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

Similar boards