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ChapBoard

CHAPARII·ChapBoard·PCB/keyboard.kicad_pcb

ChapBoard PCB layout, top view — open source RP2040/RP2350 board by CHAPARII

About the ChapBoard PCB

ChapBoard is an open source RP2040/RP2350 PCB design by CHAPARII, published on GitHub. It is a 2-layer board measuring 358.1 × 123.2 mm, with 171 components from 19 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. By type, the board carries 85 diodes, 13 fuses, 2 ICs, 2 modules, 2 crystals and 2 connectors.

It belongs with the keyboards, iot & wireless and displays & leds designs in this gallery.

From the project

As my final exams are over and I've nothing to do untill last week of june so I utlized that time in upgrading my skill, I'm on my PC all the time and in thses time I've made this keyboard.

As my final exams are over and I've nothing to do untill last week of june so I utlized that time in upgrading my skill, I'm on my PC all the time and in thses time I've made this keyboard.

My this keyboard is equiped with 89 keys, 1 rotary encoder switch and 0.91" OLED display. In this I've used Raspberry Pi Pico 2W. I used this microcontroller because I guess it will be good because it has just enough GPIO pins for the key matrix + OLED and rotary encoder, and the 2W version of the Pico has wireless through the help of bluetooth if I decide to add that functionality in the future. For the…

ChapBoard, from the project README
From the project README

Main components on the ChapBoard

Pico

ChapBoard bill of materials (BOM)

171 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
1
SW_Push
U2
2
SW_Push
A1, M1
1
SW_Push
Q1
2
SW_Push
X1, Y1
2
SW_Push
J1, P1
55
SW_Push
ALT1, B1, BACKSPACE1, BSLASH1, CAPS1, CBRACKET1, COLON1, COMMA1 +47
13
SW_Push
F1, F2, F3, F4, F5, F6, F7, F8 +5
1
SW_Push
H1
1
SW_Push
K1
1
Conn_01x04
OLED DISPLAY1
1
SW_Push
S1
1
RotaryEncoder_Switch
SW1
1
SW_Push
T1
84
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +76
1
SW_Push
D67
1
SW_Push
L1
1
SW_Push
C1
1
SW_Push
R1

ChapBoard design files

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

ChapBoard: common questions

What microcontroller does the ChapBoard use?

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

How big is the ChapBoard PCB?

The ChapBoard measures 358.1 × 123.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ChapBoard?

171 components, from 19 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 ChapBoard design files?

From the CHAPARII/ChapBoard 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 ChapBoard design in my own project?

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

Can I test firmware for the ChapBoard 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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