HardLabs

Kbn1

souptik-samanta·kbn1·PCB/Keyboard.kicad_pcb

Kbn1 PCB layout, top view — open source RP2040/RP2350 board by souptik-samanta
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About the Kbn1 PCB

Kbn1 is an open source RP2040/RP2350 PCB design by souptik-samanta, published on GitHub. It is a 2-layer board measuring 440 × 150 mm, with 398 components from 38 distinct parts.

Its main chip is the RASPBERRY_PI_PICO, from the RP2040/RP2350 family. Other key parts include the CH224K, ESP-12F, MCP23017_ML, AMS1117-3.3 and CH340C. By type, the board carries 97 capacitors, 95 LEDs, 88 switches, 88 diodes, 11 resistors and 9 connectors.

It belongs with the keyboards designs in this gallery.

Main components on the Kbn1

CH224KRASPBERRY_PI_PICOESP-12FMCP23017_MLAMS1117-3.3CH340C

Kbn1 bill of materials (BOM)

398 components, 38 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
CH224K
U1, U7
1
RASPBERRY_PI_PICO
U2
1
ESP-12F
U3
1
MCP23017_ML
U4
1
AMS1117-3.3
U6
1
CH340C
U8
1
BSS138
Q6
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1, J9
1
CONN_01X02_PIN
Conn_01x02_Pin
J2
1
CONN_02X01
Conn_02x01
J3
1
USB_C_ESP
J4
1
CONN_01X06_SOCKET
Conn_01x06_Socket
J5
1
Jumper
J7
1
CONN_01X10_PIN
Conn_01x10_Pin
J8
1
CONN_02X06_ODD_EVEN
Conn_02x06_Odd_Even
J10
1
1uF
C_BMP_280
1
10uF
C_CH340
82
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +74
1
SW_Push_BACk
SW30
1
SW_Push_Enter
SW47
Show 18 more
QtyPartRefs
1
SW_Push
SW64
1
SW_Pushs
SW71
1
SW_Push_shift
SW76
1
SW_Push_Space
SW81
1
SSD1306
Brd1
88
SK6812MINI
DL1, DL2, DL3, DL4, DL5, DL6, DL7, DL8 +80
2
LED
Green1, Green2
4
SK6812MINI
Status_0, Status_1, Status_2, Status_3
88
D
D1, D2, D3, D4, D5, D6, D7, D8 +80
88
1UF
1uF
C1, C2, C3, C4, C5, C6, C7, C8 +80
1
10UF
10uF
C89
5
100UF
100uF
C90, C91, C96, C97, C98
1
10uF
C92_mcp1
2
0.1UF
0.1uF
C94, C95
5
10K
R1, R6, R7, R45, R46
2
4.7K
4.7k
R2, R3
2
5.1K
5.1k
R4, R5
2
300
R47, R48

Kbn1 design files

The KiCad project lives in the souptik-samanta/kbn1 repository on GitHub; these links point at the commit this page was built from.

Kbn1: common questions

What microcontroller does the Kbn1 use?

The Kbn1 is built around the RASPBERRY_PI_PICO, from the RP2040/RP2350 family.

How big is the Kbn1 PCB?

The Kbn1 measures 440 × 150 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kbn1?

398 components, from 38 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 Kbn1 design files?

From the souptik-samanta/kbn1 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 Kbn1 design in my own project?

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

Can I test firmware for the Kbn1 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.

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