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Ursa base

plty·ursa

Ursa base PCB layout, top view — open source Nordic nRF board by plty

About the Ursa base PCB

Ursa base is an open source Nordic nRF PCB design by plty, published on GitHub. It is a 2-layer board measuring 189.2 × 126.8 mm, with 64 components from 15 distinct parts.

Its main chip is the nRF52840_holyiot_18010, from the Nordic nRF family. Other key parts include the BQ24075RGT, XC6206P332MR and USBLC6-2SC6. By type, the board carries 36 switches, 10 resistors, 8 ICs, 6 capacitors and 4 connectors.

From the project

ursa

Main components on the Ursa base

nRF52840_holyiot_18010BQ24075RGTXC6206P332MRUSBLC6-2SC6

Ursa base bill of materials (BOM)

64 components, 15 distinct parts.

QtyPartRefs
2
nRF52840_holyiot_18010
U1, U2
2
BQ24075RGT
U3, U6
2
XC6206P332MR
U4, U7
2
USBLC6-2SC6
U5, U8
2
USB_C_Receptacle_USB2.0
J1, J4
2
Conn_01x02
J2, J3
17
SW_Push
S1, S2, S3, S4, S5, S6, S7, S8 +9
1
combo
S16
18
SW_Push
S19, S20, S21, S22, S23, S24, S25, S26 +10
2
10uF
C1, C4
4
4u7F
C2, C3, C5, C6
4
5K1
R1, R2, R9, R10
2
802K
R3, R7
2
2M
R4, R8
2
10K
R5, R6

Ursa base design files

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

Ursa base: common questions

What microcontroller does the Ursa base use?

The Ursa base is built around the nRF52840_holyiot_18010, from the Nordic nRF family.

How big is the Ursa base PCB?

The Ursa base measures 189.2 × 126.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ursa base?

64 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ursa base design files?

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

Can I use the Ursa base design in my own project?

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

Can I test firmware for the Ursa base 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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