HardLabs

Fortyeighty

arrowtype·80forty·fortyeighty/fortyeighty.kicad_pcb

Fortyeighty PCB layout, top view — open source RP2040/RP2350 board by arrowtype
Simulate this board

About the Fortyeighty PCB

Fortyeighty is an open source RP2040/RP2350 PCB design by arrowtype, published on GitHub under the MIT license. It is a 2-layer board measuring 274.6 × 79.4 mm, with 143 components from 21 distinct parts.

Its main chip is the RP2040TR7, from the RP2040/RP2350 family. Other key parts include the XC6206PXXXMR, SRV05-4 and W25Q128JVS. By type, the board carries 53 diodes, 15 capacitors, 9 resistors, 4 ICs, 3 switches and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

The utility of an 80% keyboard in a 40% layout

The utility of an 80% keyboard in a 40% form factor.

Inspired by the design of the OP-1 Synthesizer, the explorative spirit of the 40% & 30% keyboard community (especially boards like ChonkyKong, CutiePie, and Ortho Cajal), and the tactile reference points and minimized finger-travel of many split, ergonomic keyboards. The 80forty was partly motivated by the appearance of Deadline Studio DOYS keycaps, but it works with any MX-compatible keycaps.

Fortyeighty, from the project README
From the project README

Main components on the Fortyeighty

XC6206PXXXMRSRV05-4W25Q128JVSRP2040TR7

Fortyeighty bill of materials (BOM)

143 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XC6206PXXXMR
XC6206PxxxMR
U1
1
SRV05-4
U2
1
W25Q128JVS
U3
1
RP2040TR7
U4
1
CRYSTAL_GND24_SMALL
Crystal_GND24_Small
Y1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J1
1
C883133
Fuse_Small
F1
53
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +45
2
MX_stab
S1, S2
1
RotaryEncoder_Switch
SW1
2
C318884
SW_SPST
SWR1, SWR2
1
SK6812MINI-E
LED1
53
C81598
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +45
4
1u
C1, C2, C4, C5
7
100N
100n
C3, C6, C7, C8, C9, C10, C15
1
100n
C11
2
22P
22p
C12, C13
1
10U
10u
C14
5
5.1K
5.1k
R1, R2, R3, R4, R6
2
1k
R5, R9
Show 1 more
QtyPartRefs
2
27
R7, R8

Fortyeighty design files

The KiCad project lives in the arrowtype/80forty repository on GitHub; these links point at the commit this page was built from.

Fortyeighty: common questions

What microcontroller does the Fortyeighty use?

The Fortyeighty is built around the RP2040TR7, from the RP2040/RP2350 family.

How big is the Fortyeighty PCB?

The Fortyeighty measures 274.6 × 79.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fortyeighty?

143 components, from 21 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 Fortyeighty design files?

From the arrowtype/80forty 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 Fortyeighty design in my own project?

Yes, under the terms of its MIT license, which arrowtype chose for the repository.

Can I test firmware for the Fortyeighty 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.

More boards in 80forty

Similar boards