HardLabs

Superflat

cheyao·superflat·src/superflat.kicad_pcb

Superflat PCB layout, top view — open source Nordic nRF board by cheyao

About the Superflat PCB

Superflat is an open source Nordic nRF PCB design by cheyao, published on GitHub. It is a 2-layer board measuring 102 × 85 mm, with 103 components from 29 distinct parts.

Its main chip is the NRF52840_HOLYIOT_18010, from the Nordic nRF family. Other key parts include the SRV05-4, BQ24075RGT and XC6206PXXXMR. By type, the board carries 34 switches, 32 diodes, 15 resistors, 6 connectors, 6 capacitors and 5 ICs.

It belongs with the keyboards, iot & wireless and power & battery designs in this gallery.

From the project

Super flat PG1316 keyboard

A super flat PG1316 bluetooth split keyboard - The thickness is projected to be within 1cm. And the dimensions will be around 12x12cm

The design has it's custom USB port, battery protection & charging circuit and bluetooth nRF52840 integration.

The firmware that will be used will be zmk, and the projected battery life will be 2 months

[](https://hc-cdn.hel1.your-objectstorage.com/s/v3/b5915856e3878978d86f16c3d9073a392f0f9930image.png) [](https://hc-cdn.hel1.your-objectstorage.com/s/v3/1f7b83f37460ca8510d710ef73af309514f418d7image.png)…

Main components on the Superflat

NRF52840_HOLYIOT_18010SRV05-4BQ24075RGTXC6206PXXXMR

Superflat bill of materials (BOM)

103 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
NRF52840_HOLYIOT_18010
nRF52840_holyiot_18010
U1, U5
1
SRV05-4
U2
1
BQ24075RGT
U3
1
XC6206PXXXMR
XC6206PxxxMR
U4
2
2N7002
Q1, Q2
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
1
CONN_01X04_PIN
Conn_01x04_Pin
J2
2
CONN_01X02_PIN
Conn_01x02_Pin
J3, J5
2
CONN_01X05_PIN
Conn_01x05_Pin
J4, J6
1
750MA
750mA
F1
30
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +22
2
SW_SPDT
SW31, SW33
2
SW_Push
SW32, SW34
30
C64898
D
D1, D2, D3, D4, D5, D6, D7, D8 +22
1
BSD3C051V
D31
1
LED
D32
2
BLM15PD121SN1D
L1, L2
2
100N
100n
C1, C7
2
4.7U
4.7u
C2, C3
2
1u
C5, C6
Show 9 more
QtyPartRefs
2
5.1K
5.1k
R1, R2
1
3.9K
3.9k
R3
2
1.5K
1.5k
R4, R7
1
47K
47k
R5
3
10K
10k
R6, R9, R14
2
100
R8, R13
2
100K
100k
R10, R15
1
2M
R11
1
806K
806k
R12

Superflat design files

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

Superflat: common questions

What microcontroller does the Superflat use?

The Superflat is built around the NRF52840_HOLYIOT_18010, from the Nordic nRF family.

How big is the Superflat PCB?

The Superflat measures 102 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Superflat?

103 components, from 29 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 Superflat design files?

From the cheyao/superflat 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 Superflat design in my own project?

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

Can I test firmware for the Superflat 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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