The Apple Ecosystem Human Computer Interface (AEHCI) is a small-form-factor input/output cluster designed to give you all the connections and interfaces you need, wherever you are.

Built around a universal USB-C Hub, the AEHCI can connect to most devices that support USB-C, and provides the following:

• 60% Keyboard
• Multi-Touch Trackpad
• 65w, 20K mAh power supply
• 3x USB 3.0 ports
• 2x HDMI
• 1x DisplayPort
• Gigabit Ethernet
• SD and Micro-SD Card Reader

The trackpad is positioned underneath the keyboard, with ample exposed area for left hand, 2-finger vertical scrolling and left hand thumb pointer control. This novel positioning works well to reduce the footprint of the device while improving ease of access for common activity. 

The device features a convenient carry handle that also works as a mobile device stand, facilitating convenient use with tablets and smartphones.

The AEHCI includes a removable clamshell mount for the Steam Deck, transforming it into a gorgeous all-in-one mobile workstation and gaming machine.

AEHCI Gallery

The AEHCI without attached devices.

A view of the bottom of the AEHCI, you can see how I built cable guides into the chassis to give all the wires somewhere nice to go.

The Keyboard and Trackbad are both Bluetooth compatible, and feature their own batteries, but I built all of this with reliable, consistent wired connectivity in mind.

Connected to the Steam Deck, the keyboard and trackpad work well to unlock the full potential of the hand-held workstation.

The AEHCI uses two pair of Lenovo laptop hinges to support the deck at an array of convenient viewing angles, and to clamshell closed for safe travel.

The AEHCI hinge doesn't block access to any ports, and includes ample tools for cable management, and plenty of room for additional accessories.

Not yet photographed, the Battery Module includes an optional storage box as an alternate configuration.

Multiple storage modules can be connected together if you need a bunch of connected interior storage space, though I haven't had a need for that yet.

I hope you've enjoyed seeing the AEHCI! All the files necessary to create your own, along with a shopping list, are attached to the project.