HardLabs

Lefty

RyanChomistek·lefty

Lefty PCB layout, top view — open source RP2040/RP2350 board by RyanChomistek

About the Lefty PCB

Lefty is an open source RP2040/RP2350 PCB design by RyanChomistek, published on GitHub. It is a 2-layer board measuring 425.1 × 106 mm, with 176 components from 13 distinct parts.

Its main chip is the Raspberry_Pi_Pico, from the RP2040/RP2350 family. By type, the board carries 91 switches, 84 diodes and 1 IC.

Main components on the Lefty

Raspberry_Pi_Pico

Lefty bill of materials (BOM)

176 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Raspberry_Pi_Pico
U3
70
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +62
2
Keyswitch
S18, S77
2
Keyswitch
S23, S61
2
Keyswitch
S24, S37
2
Keyswitch
S42, S73
2
Keyswitch
S54, S62
4
MX_stab
S56, S57, S75, S91
2
MX_stab
S76, S90
3
Keyswitch
S79, S80, S81
1
Keyswitch
S82
1
MX_stab
S89
84
Diode
D1, D2, D3, D4, D5, D6, D7, D8 +76

Lefty design files

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

Lefty: common questions

What microcontroller does the Lefty use?

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

How big is the Lefty PCB?

The Lefty measures 425.1 × 106 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lefty?

176 components, from 13 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 Lefty design files?

From the RyanChomistek/lefty 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 Lefty design in my own project?

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

Can I test firmware for the Lefty 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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