HardLabs

Stellar

Robostyle·stellar·PCB/left/stellar.kicad_pcb

Stellar PCB layout, top view — open source Nordic nRF board by Robostyle

About the Stellar PCB

Stellar is an open source Nordic nRF PCB design by Robostyle, published on GitHub. It is a 2-layer board measuring 158.8 × 119.9 mm, with 90 components from 12 distinct parts.

Its main chip is the Pro Micro NRF52840, from the Nordic nRF family. By type, the board carries 26 switches, 25 LEDs, 25 diodes, 6 capacitors, 4 connectors and 1 IC.

It belongs with the keyboards, iot & wireless and dev boards & breakouts designs in this gallery.

From the project

Stellar is a 50 keys column-staggered split keyboard. It is meant to be used with a ProMicro, e.g. Nice!Nano compatible controller

- revision/made text is mirrored on laR. - add silkscreen text for identifying the key, e.g. SW1, etc. - set rotation on pinky to 10° instead to 5°. - move the extra row next to the pinky column a bit up (next to the homerow?).

Main components on the Stellar

Pro Micro NRF52840

Stellar bill of materials (BOM)

90 components, 12 distinct parts.

QtyPartRefs
1
Pro Micro NRF52840
U1
1
Battery+
J1
1
Battery
J2
1
Battery-
J3
1
OLED
J4
1
SW_Push
S1
25
SW_Push_45deg
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +17
3
YS-SK6812MINI-E
indLED1, indLED2, indLED3
25
YS-SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +17
25
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +17
5
100nF
C1, C2, C3, C4, C5
1
4.7μF
C6

Stellar design files

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

Stellar: common questions

What microcontroller does the Stellar use?

The Stellar is built around the Pro Micro NRF52840, from the Nordic nRF family.

How big is the Stellar PCB?

The Stellar measures 158.8 × 119.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Stellar?

90 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Stellar design files?

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

Can I use the Stellar design in my own project?

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

Can I test firmware for the Stellar 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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