# ELLA-Box (migit)

> A pocket IoT gadget you build from an ESP32-C3 board, a 1.3-inch OLED with a rotary encoder, a buzzer and a vibration motor, in a 3D-printed case.

- **Category:** Multitools
- **Availability:** Availability unconfirmed
- **Good for:** Build a small menu-driven ESP32 gadget with haptics and a scroll wheel.
- **You'll need:** An ESP32-C3 board, the OLED-encoder module, buzzer, motor, LiPo and a 3D printer.
- **Trade-off:** Wired by hand; no radio features are used by the firmware yet.
- **Page:** https://gadgets.sh/devices/ella-box/

## Where to buy

| Shop | Status | Link |
|---|---|---|
| migit | Source repository | https://github.com/migit/Ella_box?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=ella-box&utm_content=api |

## Blueprint

**Schematics published.** README embeds a rendered schematic diagram (image, not source) plus a full wiring list, and links a Thingiverse case; despite a CERN-OHL-S 'hardware' license badge, no KiCad/Gerber/BOM source file is actually in the repo.

### Design files

- schematic: [Ella-Box v1.0.0 schematic (PNG, embedded in README)](https://github.com/user-attachments/assets/ebea0e6c-6bfb-460f-90ce-d1f5bde7b8ce) (PNG)
- enclosure: [O_Range 3D-printable enclosure (Thingiverse)](https://www.thingiverse.com/thing:7124618) (STL)

### Source repositories

- [migit/Ella_box](https://github.com/migit/Ella_box) — firmware, MIT, ★2

### Key parts

| Part | Role | Datasheet |
|---|---|---|
| ESP32-C3 | MCU (RISC-V single-core, Wi-Fi/BLE) | https://www.espressif.com/en/products/socs/esp32-c3 |
| SH1106 | OLED display driver (1.3", 128x64) | https://www.mouser.com/datasheet/2/268/1/SH1106_datasheet-2278729.pdf |
| TP4056 | LiPo battery charger IC | https://www.mouser.com/datasheet/2/308/TP4056-1812969.pdf |

_Notes:_ Repo tree (gh api) has only Firmware/*.ino, LICENSE, and LICENSE-HARDWARE (CERN-OHL-S v2 text) - no .kicad_sch/.kicad_pcb/gerber/bom files exist despite the 'Open Hardware' badge and CERN-OHL-S file; the only schematic artifact is a rendered PNG image linked from the README, and the enclosure is a separately-licensed third-party Thingiverse upload, not part of the repo.

## Specifications

### Parts

| | |
|---|---|
| Controller | ESP32-C3 development board |
| Display and input | 1.3″ SH1106 OLED module with rotary encoder and push button |
| Feedback | Coin vibration motor and passive buzzer, adjustable in settings |
| Power | 500 mAh LiPo with TP4056 charger; deep sleep about 5 µA, wakes on button or encoder |
| Enclosure | 3D-printed case published on Thingiverse |

### Wiring

| | |
|---|---|
| OLED | SDA GPIO20, SCL GPIO21 |
| Encoder | A GPIO8, B GPIO9, switch GPIO10 |
| Motor and buzzer | GPIO7 and GPIO6 (PWM) |

### Firmware

| | |
|---|---|
| Toolchain | Arduino IDE with the ESP32 core and U8g2; 310–510 KB binary |
| Menus | Main, Settings, Tools, System, Scan, About; preferences kept in EEPROM; a Snake game sketch is included |
| Licence | MIT for firmware; CERN-OHL-S for hardware |

## Documentation

- [Maker repository](https://github.com/migit/Ella_box)
- [README at the reviewed commit](https://github.com/migit/Ella_box/blob/ee8b6204977a9ba5fd6105870cb0c6dedb18a522/README.md)
- [Hackster project page](https://www.hackster.io/mikroller/ella-box-the-box-you-can-hack-57190e)
- [Enclosure on Thingiverse](https://www.thingiverse.com/thing:7124618)
- [Demo video](https://www.youtube.com/watch?v=FwfMhrrfqBY)

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Source: gadgets.sh · https://gadgets.sh/devices/ella-box/ · JSON: https://gadgets.sh/api/v1/devices/ella-box.json