HardLabs

Locust

hlord2000·Locust

Locust PCB layout, top view — open source Nordic nRF board by hlord2000

About the Locust PCB

Locust is an open source Nordic nRF PCB design by hlord2000, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 133.4 × 44.5 mm, with 33 components from 24 distinct parts.

Its main chip is the nRF5340-QKXX, from the Nordic nRF family. Other key parts include the DRV8847RTE, USBLC6-2SC6, AP63203WU, AP63205WU and MX25L3233FZN. By type, the board carries 10 connectors, 8 resistors, 7 ICs, 3 capacitors, 2 crystals and 2 test points.

From the project

A Cricut Joy hardware replacement

Locust, from the project README
From the project README

Main components on the Locust

DRV8847RTEnRF5340-QKXXUSBLC6-2SC6AP63203WUAP63205WUMX25L3233FZN

Locust bill of materials (BOM)

33 components, 24 distinct parts.

QtyPartRefs
2
DRV8847RTE
U1, U2
1
nRF5340-QKXX
U3
1
USBLC6-2SC6
U4
1
AP63203WU
U5
1
AP63205WU
U6
1
MX25L3233FZN
U7
1
ECS-320-8-37B2-7KM-TR
32MHz
Y1
1
32.768kHz
Y2
3
JST PH S3B
J1, J2, J3
1
Conn_01x06_MountingPin
J4
1
Conn_01x12_MountingPin
J5
1
Conn_01x05_MountingPin
J6
1
Barrel_Jack_MountingPin
J7
1
USB_C_Receptacle_USB2.0
J8
1
TC2030_SWD
J9
1
Conn_01x02
J10
1
UART_TX
TP1
1
UART_RX
TP2
1
2.2n
L5
1
0.7p
C34
Show 4 more
QtyPartRefs
1
NC
C35
1
1u
C36
2
5.1k
R8, R9
6
100k
R10, R11, R12, R13, R14, R15

Locust design files

The KiCad project lives in the hlord2000/Locust repository on GitHub; these links point at the commit this page was built from.

Locust: common questions

What microcontroller does the Locust use?

The Locust is built around the nRF5340-QKXX, from the Nordic nRF family.

How big is the Locust PCB?

The Locust measures 133.4 × 44.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Locust?

33 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Locust design files?

From the hlord2000/Locust repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Locust design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which hlord2000 chose for the repository.

Can I test firmware for the Locust 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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