4 layers95 × 95 mm
Cube motherboard
willem-pennings/balancing-cube
A cube that balances itself in a corner or edge using reaction wheels
52 parts1.1kGPL-3.0
2 layers120 × 105 mm
EInk Rahmen
Pertifiatus/EInk-PictureframeA battery-powered color e-paper picture frame that rotates itself between portrait and landscape. Pictures are uploaded and managed in a web interface hosted by the frame itself.
- Size
- 120 × 105 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 52
- Pads
- 109
- Tracks, vias
- 237, 13
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Oct 2026
- Updated
- 4 Oct 2026
Overview
EInk Rahmen is an open-source printed circuit board by Pertifiatus, from the Pertifiatus/EInk-Pictureframe repository on GitHub. It is a 2-layer board of 120 × 105 mm with 19 parts on 52 nets, routed with 237 tracks and 13 vias.
It is built around the ESP32-S3-DEVKITC-1-N8. Its parts include 7 resistors, 6 connectors, 3 switches, 2 ICs and 1 diode. It belongs with the lEDs and displays boards and the ESP32 boards of this library.
Main components
1README
README.mdE-Ink Picture Frame
A battery-powered color e-paper picture frame that rotates itself between portrait and landscape. Pictures are uploaded and managed in a web interface hosted by the frame itself.
Features
- 7.3" Spectra 6 e-paper (GDEP073E01, 800×480, 6 colors). It keeps the image without using power.
- Motorized rotation: a 28BYJ-48 stepper with a 40:1 worm gear turns the frame by 90°. An IMU (MPU-9250) detects the orientation and fine-tunes the position.
- Built-in web app: the frame opens its own WiFi access point (
http://192.168.4.1) where you can:- upload and delete pictures (thumbnails are generated automatically)
- create playlists and pick the current picture
- set the clock, change settings, calibrate the motor
- Deep sleep: the DS3231 RTC wakes the frame to change the picture. A button wakes it up to start the WiFi interface.
- Battery monitoring with a low-battery indicator on the picture, plus an RGB status LED.
- Images, playlists and settings are stored on a microSD card.
Hardware
| Part | Details |
|---|---|
| MCU | ESP32-S3 (with PSRAM) |
| Display | GDEP073E01 via DESPI-C02 adapter (SPI) |
| Storage | microSD (shares the SPI bus) |
| RTC / IMU | DS3231 + MPU-9250 (I2C) |
| Motor | 28BYJ-48 + ULN2003, worm gear 40:1 |
| Power | Li-ion battery |
| PCB | Custom KiCad board (Ki-Cad/EInk-Rahmen) |
All pins are defined in config.h.
Repository structure
Arduino/
eink_frame_V11/ Latest firmware (config.h, display/motor modules, web UI)
eink_frame_V2..V10/ Earlier versions / milestones
eink_frame_V10_WOmotor/ Variant without rotation motor
Test/ Hardware tests (display, SD, I2C scanner, LED, stepper)
3D Files/Frame.f3z Fusion 360 frame model
Ki-Cad/EInk-Rahmen/ Schematic and PCBGetting started
- Install these libraries: GxEPD2, ESPAsyncWebServer + AsyncTCP (mathieucarbou), RTClib, AccelStepper.
- Board: ESP32S3 Dev Module with PSRAM enabled.
- Copy
eink_frame.htmlto the SD card as/index.htmland create an/imagesfolder. - Adjust the WiFi name/password in
config.h, then uploadeink_frame_V11.ino. - Press the WiFi button, connect to the frame's network and open
http://192.168.4.1.
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R7 |
| 2 | R100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4 |
| 1 | Conn_01x02 | Library:Power Management | J6 |
| 1 | Conn_01x04 | Library:Schrittmotor Treiber | J5 |
| 1 | Conn_01x04 | Library:Time Module | J1 |
| 1 | Conn_01x06 | Library:SD Karten Modul | J3 |
| 1 | Conn_01x08 | Library:Display Treiber | J4 |
| 1 | Conn_01x10 | Library:MPU Modul | J2 |
| 1 | ESP32-S3-DevKitC | Library:ESP32-S3-DevKitC | U1 |
| 1 | Kugelschalter | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SW1 |
| 1 | LED_ABGR | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | D1 |
| 1 | R150 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | SW_Wuerth_450301014042 | Button_Switch_THT:SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW3 |
| 1 | Wlan Taster | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SW2 |
| 1 | ~ | Library:TP4056 USB-C Charging | U2 |
Questions
How big is the EInk Rahmen PCB?
It measures 120 × 105 mm and has 2 copper layers, 1.6 mm thick.
What parts does the EInk Rahmen use?
19 parts, built around the ESP32-S3-DEVKITC-1-N8. 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 EInk Rahmen KiCad files?
From the Pertifiatus/EInk-Pictureframe repository on GitHub, at the commit this page was made from: the board is Ki-Cad/EInk-Rahmen/EInk-Rahmen.kicad_pcb and its schematic Ki-Cad/EInk-Rahmen/EInk-Rahmen.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the EInk Rahmen design in my own project?
Its repository states no licence, so its author keeps all rights: ask Pertifiatus before reusing the design.
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