HardLabs

Keypad

MaprilBear·Keebo·hw/PCB/Keypad/Keypad/Keypad.kicad_pcb

Keypad PCB layout, top view — open source Nordic nRF board by MaprilBear

About the Keypad PCB

Keypad is an open source Nordic nRF PCB design by MaprilBear, published on GitHub. It is a 2-layer board measuring 96.2 × 57.3 mm, with 44 components from 16 distinct parts.

Its main chip is the XIAO-nRF52840-DIP, from the Nordic nRF family. Other key parts include the TXU0101DCKR and TM4C123GH6PMI7. By type, the board carries 11 capacitors, 9 relays, 9 LEDs, 9 diodes, 3 ICs and 2 connectors.

It belongs with the keyboards, iot & wireless and displays & leds designs in this gallery.

From the project

USB and Bluetooth Keyboard with LCD and RGB

Main components on the Keypad

TXU0101DCKRTM4C123GH6PMI7XIAO-nRF52840-DIP

Keypad bill of materials (BOM)

44 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TXU0101DCKR
TXU0101DBVR
IC1
1
TM4C123GH6PMI7
74HC595
U1
1
XIAO-nRF52840-DIP
U3
1
Adafruit TFT
J1
1
CONN_01X07_PIN
Conn_01x04
J2
9
KEYSW
K1, K2, K3, K4, K5, K6, K7, K8 +1
1
RotaryEncoder_Switch
SW1
9
SK6812-MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +1
9
1N4448W
D1, D2, D3, D4, D5, D6, D7, D8 +1
1
1.0U
100nF
C1
4
0.1U
100nF
C2, C3, C4, C5
1
0.1UF
100nF
C6
1
4.7UF
100nF
C7
2
10P
100nF
C8, C9
1
0.01U
100nF
C10
1
2.2U
100nF
C11

Keypad design files

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

Keypad: common questions

What microcontroller does the Keypad use?

The Keypad is built around the XIAO-nRF52840-DIP, from the Nordic nRF family.

How big is the Keypad PCB?

The Keypad measures 96.2 × 57.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keypad?

44 components, from 16 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 Keypad design files?

From the MaprilBear/Keebo 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 Keypad design in my own project?

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

Can I test firmware for the Keypad 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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