HardLabs

MainBoard

GRAMCTRL·GRAM-PRISM·v1/PCBs/Main Board/MainBoard.kicad_pcb

MainBoard PCB layout, top view — open source RP2040/RP2350 board by GRAMCTRL
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About the MainBoard PCB

MainBoard is an open source RP2040/RP2350 PCB design by GRAMCTRL, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 106.6 × 0.1 mm, with 41 components from 19 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS and XC6206. By type, the board carries 17 capacitors, 8 resistors, 3 ICs, 2 connectors, 2 diodes and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A modular and scalable design based on WunWae's Prism Controller

If you would like to support the developers of this project, consider purchasing parts like buttons, PCBs, USB-C to GCC cables, and official GRAM builds at GRAMCTRL.COM rather than a fab house.

Included Files - Included in this repo is all the files needed to get started with a PRI$M build: - PRI$M Frame .stl files - Aluminum Panel Gerber files (5 of 'em!) - PCB Gerbers for multiple hand layouts and a panelized version for the standard layout

Main components on the MainBoard

RP2040W25Q128JVSXC6206

MainBoard bill of materials (BOM)

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

QtyPartRefs
1
RP2040
U1
1
W25Q128JVS
U2
1
XC6206
U3
1
12MHZ
12MHz
Y1
1
C376047
FFC Connector
J2
1
C160405
JST Connector
J3
7
C5333465
choc_SW_HS
CH1, CH2, CH3, CH4, CH5, CH6, CH7
1
C318884
Boot
SW1
1
C8598
Schottky Diode
D1
1
C2297
GREEN
D2
1
10UF
10uF
C1
4
1UF
1uF
C2, C7, C16, C17
10
100NF
100nF
C3, C4, C5, C6, C8, C9, C10, C11 +2
2
22PF
22pF
C13, C14
2
27
R1, R2
2
10K
10k
R3, R8
2
1k
R4, R5
1
5.6K
5.6k
R6
1
10K
10k
R7

MainBoard design files

The KiCad project lives in the GRAMCTRL/GRAM-PRISM repository on GitHub; these links point at the commit this page was built from.

MainBoard: common questions

What microcontroller does the MainBoard use?

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

How big is the MainBoard PCB?

The MainBoard measures 106.6 × 0.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MainBoard?

41 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 MainBoard design files?

From the GRAMCTRL/GRAM-PRISM 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 MainBoard design in my own project?

Yes, under the terms of its GPL-3.0 license, which GRAMCTRL chose for the repository.

Can I test firmware for the MainBoard 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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