2 layers26 × 30 mm
Microcontroller
FrameworkComputer/ExpansionCards
Reference designs and documentation to create Expansion Cards for the Framework Laptop
34 parts1.1kCC-BY-4.0
2 layers63.8 × 38 mm
Identity Card-
JH-2108/Identity-Card-A custom-designed electronic identity card featuring an ESP32-C3, OLED display, and interactive information pages, built with KiCAD and programmed with Arduino-compatible firmware.
- Size
- 63.8 × 38 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 23
- Pads
- 48
- Tracks, vias
- 58, 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 Oct 2026
- Updated
- 2 Nov 2026
Overview
Identity Card- is an open-source printed circuit board by JH-2108, from the JH-2108/Identity-Card- repository on GitHub. It is a 2-layer board of 63.8 × 38 mm with 11 parts on 23 nets, routed with 58 tracks and 2 vias.
It is built around the AP2112K-3.3. Its parts include 4 switches, 3 connectors, 2 capacitors and 1 IC. It belongs with the lEDs and displays boards of this library.
Main components
1README
README.mdE-ID: Electronic Identity Card
E-ID is a compact electronic identity card built around an ESP32-C3 microcontroller and an OLED display. It presents identity information and project details through a simple, button-controller interface.
The project focuses on custom PCB designing in KiCAD, embedded firmware development, and practical electronics assembly.
Features
- Displays a name, username, role, and project information.
- Uses an OLED display with 128×64 resolution.
- Supports multiple information pages.
- Provides physical buttons for navigating the interface.
- Uses an ESP32-C3 SuperMini for processing and firmware execution.
- Connects the display and controller through a custom-designed PCB.
- Uses USB power through the development board.
- Allows identity information to be changed through firmware.
Hardware
| Component | Purpose |
|---|---|
| ESP32-C3 SuperMini | Main microcontroller |
| 0.96 inch OLED display | Displays identity information |
| Two tactile push buttons | Navigate between pages |
| female pin headers | connects removable modules |
| Custom two-layer PCB | Holds and connects the components |
How it works
The ESP32-C3 runs the firmware and communicates with the OLED display. The display presents the current information page, while the physical buttons allow the user to switch between pages.
The initial firmware will provide three pages:
- Identity: Name, username, and role.
- About: A short biography or introduction.
- Projects: Selected projects and technical interests.
The information will initially be stored in the firmware, so changing the displayed content will require updating and uploading the code.
PCB Design
The PCB will be designed in KiCAD and will include:
- A footprint and header connections for the ESP32-C3 SuperMini.
- A four pin OLED connector
- Two-button footprints
- Power and ground connections
- Routing between the controller, display, and buttons.
- A compact board outline inspired by the dimensions of a standard identity card.
The development board and OLED will remain removable, allowing individual components to be replaced without redesigning the entire PCB.
The PCB layout will be finalized after checking the actual dimensions and pin positions of the selected modules.
Firmware
The firmware will be developed using the Arduino framework for the ESP32-C3.
Planned software functions include:
- Initializing the OLED display.
- Rendering text and page layouts.
- reading button inputs.
- switching between information pages.
- displaying a consistent interface after setup.
The SSD1306 compatible display library will be used if the selected OLED module supports the SSD1306 controller.
Images of the project
PCB design
schematics
3D Rendering
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1, J2 |
| 2 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J4 |
| 1 | SSD1306 | SSD1306:128x64OLED | Brd1 |
| 1 | SW_SPDT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | SW4 |
| 1 | SW_SPST | Button_Switch_THT:SW_SPST_Omron_B3F-40xx | SW3 |
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Questions
How big is the Identity Card- PCB?
It measures 63.8 × 38 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Identity Card- use?
11 parts, built around the AP2112K-3.3. 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 Identity Card- KiCad files?
From the JH-2108/Identity-Card- repository on GitHub, at the commit this page was made from: the board is PCB/Identity card.kicad_pcb and its schematic PCB/Identity card.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Identity Card- design in my own project?
Its repository states no licence, so its author keeps all rights: ask JH-2108 before reusing the design.