HardLabs

Guilty devboard xrd

askiiart·guilty-devboard-xrd·PCB/guilty-devboard-idk.kicad_pcb

Guilty devboard xrd PCB layout, top view — open source Nordic nRF board by askiiart

About the Guilty devboard xrd PCB

Guilty devboard xrd is an open source Nordic nRF PCB design by askiiart, published on GitHub. It is a 6-layer board measuring 17.8 × 33.2 mm, with 55 components from 42 distinct parts.

Its main chip is the NRF54LM20A-QGAA, from the Nordic nRF family. Other key parts include the SGM40567-4.2XG, TCA9536, FH9261-G3JH and BD83070GWL-E2. By type, the board carries 20 capacitors, 14 resistors, 8 inductors, 5 ICs, 2 crystals and 2 diodes.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A high-end Xiao clone with a ton of GPIO, a focus on extremely low power draw, and uh yeah idk what else

A dev board for my keyboard, because all the options kinda suck

- Compatible with both XIAO nRF52840 Plus and nRF54LM20A - As efficient as possible - Fast battery charging (configurable ~50-700mA) and over(dis)charge protection - Up to 5V 3A from USB, and 3.3V 1A (including MCU power draw) - 27 GPIO pins, nearly as much as the XIAO nRF54LM20A, despite much more limited manufacturing capabilities, while still having an antenna built-in.

Guilty devboard xrd, from the project README
From the project README

Main components on the Guilty devboard xrd

NRF54LM20A-QGAASGM40567-4.2XGTCA9536FH9261-G3JHBD83070GWL-E2

Guilty devboard xrd bill of materials (BOM)

55 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NRF54LM20A-QGAA
nRF54LM20A-QGAA
U1
1
SGM40567-4.2XG
SGM40567-4.2XG/TR
U2
1
TCA9536
U4
1
FH9261-G3JH
U5
1
BD83070GWL-E2
U6
1
SP2038CNQ
Q1
1
32MHZ
32MHz
Y1
1
32.768KHZ
32.768kHz
Y2
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
1
Antenna_Chip
AE1
1
JUMPER_2_OPEN
Jumper_2_Open
JP1
2
D
D6, D7
2
FerriteBead
FB1, FB2
1
3.3NH
3.3nH
L1
1
1.5UH
1.5uH
L3
1
4.7NH
4.7nH
L4
1
3.6NH
3.6nH
L5
1
4.7UH
4.7uH
L6
1
1.0NH
1.0nH
L7
1
10UF
10uF
C1
Show 22 more
QtyPartRefs
4
100NF
100nF
C2, C8, C9, C21
2
DNP
C3, C7
4
4.7UF
4.7uF
C4, C11, C14, C17
1
1.0PF
1.0pF
C5
2
2.2UF
2.2uF
C6, C13
1
0.1UF
0.1uF
C12
1
1.5PF
1.5pF
C15
2
22UF
22uF
C16, C19
1
1.2PF
1.2pF
C18
1
0.47UF
0.47uF
C23
2
5.1K
5.1k
R1, R2
1
470K
470k
R3
2
30
R4, R5
1
2k
R6
1
1k
R7
1
806K
806k
R8
1
2M
R9
1
10K
10k
R12
1
220K
220k
R14
1
68K
68k
R15
1
2.2
R16
1
200
R17

Guilty devboard xrd design files

The KiCad project lives in the askiiart/guilty-devboard-xrd repository on GitHub; these links point at the commit this page was built from.

Guilty devboard xrd: common questions

What microcontroller does the Guilty devboard xrd use?

The Guilty devboard xrd is built around the NRF54LM20A-QGAA, from the Nordic nRF family.

How big is the Guilty devboard xrd PCB?

The Guilty devboard xrd measures 17.8 × 33.2 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the Guilty devboard xrd?

55 components, from 42 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 Guilty devboard xrd design files?

From the askiiart/guilty-devboard-xrd 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 Guilty devboard xrd design in my own project?

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

Can I test firmware for the Guilty devboard xrd without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.

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