HardLabs

Smol audio pad

tobycm·smol-audio-pad·pcb/smol-audio-pad.kicad_pcb

Smol audio pad PCB layout, top view — open source Nordic nRF board by tobycm

About the Smol audio pad PCB

Smol audio pad is an open source Nordic nRF PCB design by tobycm, published on GitHub under the MIT license. It is a 2-layer board measuring 60 × 40 mm, with 14 components from 12 distinct parts.

Its main chip is the XIAO-nRF52840-SMD, from the Nordic nRF family. Other key parts include the DW01A. By type, the board carries 5 switches, 4 resistors, 2 ICs, 1 transistor, 1 connector and 1 capacitor.

It belongs with the iot & wireless and audio designs in this gallery.

From the project

a smol ble audio control pad

a small keypad equipped with a xiao nrf52840 and a battery for portable and wireless usage, with a rotary encoder for input freedom!!

Smol audio pad, from the project README
From the project README

Main components on the Smol audio pad

XIAO-nRF52840-SMDDW01A

Smol audio pad bill of materials (BOM)

14 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-nRF52840-SMD
U1
1
DW01A
U2
1
FS8205A
EVVO
Q1
1
Battery_JST
J1
1
RotaryEncoder_Switch_MP
SW1
1
Next
SW2
1
Previous
SW3
1
Fn1
SW4
1
Fn2
SW5
1
100n
C1
1
100
R1
3
1k
R2, R3, R4

Smol audio pad design files

The KiCad project lives in the tobycm/smol-audio-pad repository on GitHub; these links point at the commit this page was built from.

Smol audio pad: common questions

What microcontroller does the Smol audio pad use?

The Smol audio pad is built around the XIAO-nRF52840-SMD, from the Nordic nRF family.

How big is the Smol audio pad PCB?

The Smol audio pad measures 60 × 40 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Smol audio pad?

14 components, from 12 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 Smol audio pad design files?

From the tobycm/smol-audio-pad 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 Smol audio pad design in my own project?

Yes, under the terms of its MIT license, which tobycm chose for the repository.

Can I test firmware for the Smol audio pad 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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