HardLabs

PicoLX

dj505·PicoLX·MainPCB/PicoLX.kicad_pcb

PicoLX PCB layout, top view — open source RP2040/RP2350 board by dj505

About the PicoLX PCB

PicoLX is an open source RP2040/RP2350 PCB design by dj505, published on GitHub. It is a 2-layer board measuring 129.5 × 70.6 mm, with 83 components from 21 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q32JVSS, NCP1117-3.3_SOT223 and SN74LV1T34DBV. By type, the board carries 36 capacitors, 19 LEDs, 8 resistors, 4 ICs, 3 switches and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A flashier successor to the PicoFX

Q: Can I buy a pre-assembled and ready-to-use PicoLX from you? A: Not yet. Maybe in the future! Never hurts to ask, I occasionally have spare units sitting around.

Q: How do I change between keyboard, controller, and PIUIO mode? A: Controller and keyboard mode are both part of one firmware, and PIUIO mode requires its own firmware. To toggle between keyboard and controller mode, hold the inner button on the right hand side of the PicoLX while plugging it in. The PIUIO firmware is set to PIUIO mode at all times.

Main components on the PicoLX

RP2040W25Q32JVSSNCP1117-3.3_SOT223SN74LV1T34DBV

PicoLX bill of materials (BOM)

83 components, 21 distinct parts.

QtyPartRefs
1
RP2040
U1
1
W25Q32JVSS
U2
1
NCP1117-3.3_SOT223
U3
1
SN74LV1T34DBV
U4
1
12.000MHz
Y1
1
USB_C_Receptacle_USB2.0
J1
10
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +2
1
SW_Push
SW1
1
Test
SW2
1
Service
SW3
19
SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +11
1
DNF
D1
11
100nF
C1, C2, C4, C5, C7, C8, C9, C12 +3
2
1uF
C3, C6
2
27pF
C10, C11
2
10uF
C15, C16
19
100uF
C18, C19, C20, C21, C22, C23, C24, C25 +11
2
1k
R1, R8
2
DNF
R2, R3
2
27 Ohm
R4, R5
Show 1 more
QtyPartRefs
2
5.1k
R6, R7

PicoLX design files

The KiCad project lives in the dj505/PicoLX repository on GitHub; these links point at the commit this page was built from.

PicoLX: common questions

What microcontroller does the PicoLX use?

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

How big is the PicoLX PCB?

The PicoLX measures 129.5 × 70.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PicoLX?

83 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the PicoLX design files?

From the dj505/PicoLX repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the PicoLX design in my own project?

The repository has no license, so all rights stay with dj505. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PicoLX 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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