4 layers50.1 × 32.6 mm Wearable e ink, the printed circuit board in 3D

Wearable e ink

Initial designed to give workshops at HighTechLab in Leuven

Size: 50.1 × 32.6 mm
Copper layers: 4
Thickness: 1.2 mm
Parts: 41
Nets: 66
Pads: 164
Tracks, vias: 366, 81
Pours: 4
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 3 Oct 2025
Updated: 3 Oct 2025

Overview

Wearable e ink is an open-source printed circuit board by Just4Stan, from the Just4Stan/soldering-workshop repository on GitHub. It is a 4-layer board of 50.1 × 32.6 mm with 41 parts on 66 nets, routed with 366 tracks and 81 vias.

It is built around the ESP-12F(ESP8266MOD) and 05A20H24P. Its parts include 14 capacitors, 12 resistors, 10 ICs, 4 diodes and 1 inductor. It belongs with the lEDs and displays and wearables boards and the ESP8266 boards of this library.

Main components

README

README.md

Wearable-E-Ink

A beginner-friendly soldering workshop project to build a WiFi-enabled, programmable e-paper name badge. This project is designed to be completed in a 2-3 hour session, teaching participants how to solder both through-hole and surface-mount (SMD) components.

Initial designed to give workshops at HighTechLab in Leuven Screenshot 2025-10-03 at 11 06 39

Block Diagram

(AI generated for simple overview) See the kicad files for schematics and PCB design

Display

See datasheet for "GDEM0154Z91"

CAD

OnShape: https://cad.onshape.com/documents/da012de4a02ab2054a0e627e/w/e4c4a902931b74520d1464dc/e/3234466a68d54d344f0d976d?renderMode=0&uiState=68dfa4af8854ede9226c917d

Features

ESP8266 Powered: Uses the powerful ESP-12F module for WiFi connectivity and control.
High-Contrast Display: Features a 1.54-inch, 200x200 pixel black and white e-paper screen.
Beginner-Friendly Design: The PCB is laid out with "progressive difficulty," starting with easy components to build confidence before moving to more challenging SMD parts.
USB-C Connectivity: Modern, robust connector for power and programming.
Web Updatable: Firmware supports updating the display content via a simple web API over WiFi.
Fully Open Source: The hardware design and firmware are free to use, modify, and distribute.

Parts

Qty	Value	Footprint	References
7	1uF	wearable-e-inks:C1206	C9, C10, C11, C12, C13, C14, C18
7	5.1k	wearable-e-inks:R1206	R4, R5, R6, R7, R8, R9, R13
3	100nF	wearable-e-inks:C1206	C5, C6, C8
3	220Ohm	wearable-e-inks:R1206	R10, R11, R12
3	shottky	wearable-e-inks:SOD-123_L2.8-W1.8-LS3.7-RD	D1, D2, D3
2	10uF	wearable-e-inks:C1206	C4, C7
2	441_7	wearable-e-inks:SW-SMD_4P-L5.2-W5.2-P3.70-LS6.5	U1, U8
2	4.7uF	wearable-e-inks:C1206	C16, C17
2	NPN	wearable-e-inks:SOT-23-LDO	U9, U10
1	05A20H24P	wearable-e-inks:FPC-SMD_24P-P0.50_05A20H24P	U11
1	1MR	wearable-e-inks:R1206	R3
1	2.2R	wearable-e-inks:R1206	R14
1	47uF	wearable-e-inks:IND-SMD_L4.0-W4.0	L2
1	CH340C_USB	wearable-e-inks:SOP-16_L10.0-W3.9-P1.27-LS6.0-BL	U3
1	ESP-12F(ESP8266MOD)	wearable-e-inks:WIFIM-SMD_ESP-12F-ESP8266MOD	U5
1	LDO	wearable-e-inks:SOT-23-LDO	U7
1	N-MOS	wearable-e-inks:SOT-23-LDO	U4
1	RED LED	wearable-e-inks:LED1206-R-RD_RED	LED1
1	TYPE-C	wearable-e-inks:USB-C_SMD-TYPE-C-31-M-12_1	U6

Questions

How big is the Wearable e ink PCB?

It measures 50.1 × 32.6 mm and has 4 copper layers, 1.2 mm thick.

What parts does the Wearable e ink use?

41 parts, built around the ESP-12F(ESP8266MOD) and 05A20H24P. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Wearable e ink KiCad files?

From the Just4Stan/soldering-workshop repository on GitHub, at the commit this page was made from: the board is wearable_e-ink.kicad_pcb and its schematic wearable_e-ink.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Wearable e ink design in my own project?

Its repository states no licence, so its author keeps all rights: ask Just4Stan before reusing the design.

Category and platform

LEDs and displays Wearables ESP8266

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/just4stan-soldering-workshop" title="Wearable e ink in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/just4stan-soldering-workshop.jpg" alt="Wearable e ink" width="1200" height="900">

A picture that opens the board, for a README

[![Wearable e ink](https://pcbkit.io/embed/boards/just4stan-soldering-workshop.jpg?size=s)](https://pcbkit.io/boards/just4stan-soldering-workshop)

Source

Repository: Just4Stan/soldering-workshop
Board file: wearable_e-ink.kicad_pcb
Commit: dfd16b3
Licence: Not stated

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