Keyboard
About the Keyboard PCB
Keyboard is an open source Nordic nRF PCB design by anhenaobe, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 29.5 × 36.1 mm, with 67 components from 47 distinct parts.
Its main chip is the NRF52840-QFAA-F-R7, from the Nordic nRF family. Other key parts include the MCP73871T-2CCI/ML, USBLC6-2SC6 and TPS63031DSKR. By type, the board carries 32 capacitors, 11 resistors, 5 inductors, 4 ICs, 3 diodes and 2 crystals.
It belongs with the iot & wireless, power & battery and keyboards designs in this gallery.
From the project
Reusable four-layer nRF52840 wireless SoM with BLE, USB-C, LiPo charging, buck-boost power management, RF antenna integration, and manufacturing-ready outputs.
A reusable four-layer wireless System-on-Module based on the Nordic nRF52840-QFAA, designed for integration into future carrier boards. The electrical design and PCB layout exist as a mature prototype candidate, but the board has not yet been fabricated or physically validated.
- nRF52840-QFAA Bluetooth Low Energy-capable MCU (U1). - USB-C connector used for power input only; USB data is not implemented. - MCP73871 single-cell LiPo charger and power-path controller (U2). - TPS63031 fixed 3.3 V buck-boost regulator (U4). - Johanson 2450AT18A100E ceramic 2.4 GHz antenna (AE1). - Nordic-style…
Main components on the Keyboard
Keyboard bill of materials (BOM)
67 components, 47 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NRF52840-QFAA-F-R7 nRF52840 | Nordic_AQFN-73-1EP_7x7mm_P0.5mm | U1 |
| 1 | MCP73871T-2CCI/ML MCP73871 | QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U2 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U3 |
| 1 | TPS63031DSKR TPS63031DSK | WSON-10-1EP_2.5x2.5mm_P0.5mm_EP1.2x2mm | U4 |
| 1 | Q13FC13500004 Crystal | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | Crystal | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y3 |
| 2 | Conn_01x01 | PinHeader_1x01_P1.27mm_Vertical | J1, J2 |
| 1 | 2450AT18A100E Antenna | Johanson_2450AT18x100 | AE1 |
| 1 | Conn_01x14_Pin | PinHeader_1x14_P1.27mm_Vertical | COLS1 |
| 1 | Conn_01x06 | PinHeader_1x06_P1.27mm_Vertical | HEADER_SWD1 |
| 1 | Conn_01x06_Pin | PinHeader_1x06_P1.27mm_Vertical | ROWS1 |
| 1 | Conn_01x16_Pin | PinHeader_1x16_P1.27mm_Vertical | SPE1 |
| 1 | MSK12C02 SW_Wuerth_450301014042 | SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW2 |
| 1 | RC0603FR-0710KL 10k | R_0603_1608Metric | TH1 |
| 1 | USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | USB_C1 |
| 3 | KT-0603R LED | LED_0603_1608Metric | D1, D2, D3 |
| 1 | SDCL1005C4N7STDF 4.7nH | L_0402_1005Metric | L1 |
| 1 | LQG15HS2N2S02D 2.2nH | L_0402_1005Metric | L2 |
| 1 | LQW15DN100M00D 10uH | L_0402_1005Metric | L3 |
| 1 | LQG15HS15NJ02D 15nH | L_0402_1005Metric | L4 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SDFL1005Q1R5KTF 1.5uH | L_0402_1005Metric | L5 |
| 1 | 0402CG1R0C500NT 1.0pF | C_0402_1005Metric | C1 |
| 1 | 0402CG1R2C500NT 1.2pF | C_0402_1005Metric | C2 |
| 1 | Z1 | C_0402_1005Metric | C3 |
| 1 | 0402WGF0000TCE Z2 | C_0402_1005Metric | C4 |
| 1 | Z3 | C_0402_1005Metric | C5 |
| 1 | CL21A106KAYNNNE 10uF | C_0805_2012Metric | C6 |
| 3 | CL10A106KP8NNNC 10uF | C_0603_1608Metric | C7, C27, C32 |
| 1 | CC0603KRX7R9BB104 0.1uF | C_0603_1608Metric | C8 |
| 3 | CL10A475KO8NNNC 4.7uF | C_0603_1608Metric | C9, C10, C26 |
| 4 | 0402CG120J500NT 12pF | C_0402_1005Metric | C11, C12, C28, C29 |
| 1 | CC0603KRX7R9BB104 1uF | C_0603_1608Metric | C13 |
| 1 | CL10A105KB8NNNC 1uF | C_0603_1608Metric | C14 |
| 1 | CL05A105KA5NQNC 47nF | C_0402_1005Metric | C15 |
| 2 | N.C | C_0402_1005Metric | C16, C20 |
| 4 | CL05B104KO5NNNC 100nF | C_0402_1005Metric | C17, C18, C22, C23 |
| 1 | 0402CG101J500NT 100pF | C_0402_1005Metric | C19 |
| 1 | 820pF | C_0402_1005Metric | C21 |
| 2 | 4.7uF | C_0603_1608Metric | C24, C25 |
| 1 | CL05B103KB5NNNC 10nF | C_0402_1005Metric | C30 |
| 1 | 100nF | C_0402_1005Metric | C31 |
| 3 | 0603WAF1001T5E 1k | R_0603_1608Metric | R1, R2, R4 |
| 2 | RC0603FR-0710KL 10k | R_0603_1608Metric | R3, R6 |
| 1 | 0603WAF2001T5E 2k | R_0603_1608Metric | R5 |
| 1 | 0603WAF1003T5E 100k | R_0603_1608Metric | R7 |
| 2 | 0603WAF5101T5E 5.1k | R_0603_1608Metric | R9, R10 |
| 2 | 0603WAF2004T5E 2M | R_0603_1608Metric | R11, R12 |
Keyboard design files
The KiCad project lives in the anhenaobe/nrf52840-modular-wireless-som repository on GitHub; these links point at the commit this page was built from.
Keyboard: common questions
What microcontroller does the Keyboard use?
The Keyboard is built around the NRF52840-QFAA-F-R7, from the Nordic nRF family.
How big is the Keyboard PCB?
The Keyboard measures 29.5 × 36.1 mm, has 4 copper layers and is 1.0192 mm thick.
How many components are on the Keyboard?
67 components, from 47 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 Keyboard design files?
From the anhenaobe/nrf52840-modular-wireless-som 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 Keyboard design in my own project?
Yes, under the terms of its GPL-3.0 license, which anhenaobe chose for the repository.
Can I test firmware for the Keyboard 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.
More boards in nrf52840-modular-wireless-som
Similar boards
Nordic nRFTOTEM
GEIGEIGEIST
258.8 × 94.4 mm85 parts2LCERN-OHL-P-2.02.0k
Nordic nRFPixl.js
solosky
40 × 23 mm45 parts4LGPL-2.01.4k
Nordic nRFBoard
dennisss
363 × 128 mm420 parts4LApache-2.0381
Nordic nRFManagement
101 × 31.5 mm50 parts2LApache-2.0381
Nordic nRFBoard hl15-latest
61 × 37 mm14 parts2LApache-2.0381
Nordic nRFMikoto
zhiayang
18 × 33.3 mm53 parts4LApache-2.0355