HardLabs

Nudge

TheOtherTwinCoder·Nudge·PCB/PCB.kicad_pcb

Nudge PCB layout, top view — open source ESP32 board by TheOtherTwinCoder
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About the Nudge PCB

Nudge is an open source ESP32 PCB design by TheOtherTwinCoder, published on GitHub. It is a 2-layer board measuring 31 × 42.6 mm, with 4 components from 4 distinct parts.

Its main chip is the XIAO-ESP32-S3-SMD, from the ESP32 family. Other key parts include the ADAFRUIT-MAX98357. By type, the board carries 2 ICs, 1 battery holder and 1 speaker.

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

From the project

An AI Pin made for outpost (but it doesn't need anything other than its parts, or WiFi!)

AI's creating a revolution throughout the world, and in early 2025, I (along with many others) saw the Humane AI Pin for the first time! It was revolutionary, but four harsh parts of the device stood out:

- Cloud AI Processing - Needed a SIM Card - Forced users into a subscription - WAS $699!!

For this reason, I'm setting out to create the better version that doesn't need any of those reqirements - and as I'm calling it, Nudge!

Nudge, from the project README
From the project README

Main components on the Nudge

XIAO-ESP32-S3-SMDADAFRUIT-MAX98357

Nudge bill of materials (BOM)

4 components, 4 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-ESP32-S3-SMD
U1
1
ADAFRUIT-MAX98357
adafruit-MAX98357
U3
1
C5188434
Battery_Cell
BT1
1
C5188434
Speaker
LS2

Nudge design files

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

Nudge: common questions

What microcontroller does the Nudge use?

The Nudge is built around the XIAO-ESP32-S3-SMD, from the ESP32 family.

How big is the Nudge PCB?

The Nudge measures 31 × 42.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nudge?

4 components, from 4 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 Nudge design files?

From the TheOtherTwinCoder/Nudge 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 Nudge design in my own project?

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

Can I test firmware for the Nudge without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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