Ara

Open Time. Open Source.

Key Features • PCB • Credits

 

Ara is a custom watch PCB built around STM32, and LiPo charging into a 2 layer manufacturable board. Built because most smartwatches don't let you know whats inside. Ara is designed from scratch open source and exactly what's needed.

To build your own, grab the KiCad files, review the schematic below, and send the panelized design to your preferred PCB fab. Flash your firmware over STM32 HEADER PINS and you're good to go.

Every smartwatch on the market is firmware locked. Ara exists to change that.

Key Features

• STM32 microcontroller which can go into ultra low power mode
• Battery charging with Integrated IC and solder pad for 1S LiPo
• Multiple Status LEDs for visual feedback
• USB-C connectivity
• Panelized design for cost-effective manufacturing

PCB

Designed in KiCad with attention to power management, and IC integration. The board features a 2-layer optimized routing.

Schematic

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PCB Layers

Layer 1

Layer 2

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Board Views

Front

Back

Zine

Credits

This project uses:

• KiCad
• Blender for renders
• Hack Club Fallout

License

GPL