HardLabs

ALT

JustAGlitchFL·CTRL·ALT (Right)/ALT/ALT.kicad_pcb

ALT PCB layout, top view — open source RP2040/RP2350 board by JustAGlitchFL

About the ALT PCB

ALT is an open source RP2040/RP2350 PCB design by JustAGlitchFL, published on GitHub. It is a 4-layer board measuring 198.8 × 151.5 mm, with 130 components from 12 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. Other key parts include the MCP3008. By type, the board carries 82 diodes, 40 switches, 5 capacitors, 1 IC, 1 module and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A split semi-compact keyboard with extra features

Main components on the ALT

MCP3008RaspberryPi_Pico

ALT bill of materials (BOM)

130 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP3008
U2
1
RaspberryPi_Pico
A2
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J2
1
RKJXT1F42001
S3
1
RKJXV122400R
S4
35
SW_Push
SW35, SW37, SW38, SW39, SW41, SW42, SW43, SW44 +27
1
SW_Push
SW65
1
SHIFT
SW73
1
SPACE
SW76
44
D
D41, D77, D78, D79, D81, D82, D83, D84 +36
38
SK6812MINI
D80, D115, D122, D123, D124, D125, D126, D127 +30
5
C
C40, C41, C42, C43, C44

ALT design files

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

ALT: common questions

What microcontroller does the ALT use?

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

How big is the ALT PCB?

The ALT measures 198.8 × 151.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the ALT?

130 components, from 12 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 ALT design files?

From the JustAGlitchFL/CTRL 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 ALT design in my own project?

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

Can I test firmware for the ALT 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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