Both revisions were sold through small group buys hosted on both Aeternus Decorum's Discord server and the
#vaporware channel on the 40% Keyboards Discord server.
The backside of the PCB included all of the soldered components including the integrated Bluetooth module located above the spacebar switch. Two small through-hole pads to the left of the Bluetooth module allowed for wires to be soldered for a 3.7 volt lithium-polymer battery to allow wireless operation. An integrated circuit enabled the board to recharge the battery when plugged into a host or other power source via the USB C port. The USB port was located in the top-right corner and 7 mounting holes were included to to ensure compatibility with MiniVan cases.
All switch positions were south-facing with the exception of the left split spacebar which had to be flipped to make space for the Bluetooth module. PCB-mount stabilizer holes were included for both split spacebars and a 6.25u spacebar to support the JetVan layout. There were no holes for in-switch LEDs or surface-mount LEDs anywhere on the board.
Bluetooth compatibility was enabled through the use of a E73-2G4M08S1C Bluetooth module. The board ran on ZMK firmware (rather than the more popular QMK firmware) because the GPL-licensed QMK firmware prevents the inclusion and distribution of the closed-source SDKs for the Bluetooth modules. ZMK uses the MIT license and as such does not have these restrictions for distribution. Aeternus Decorum's fork of ZMK for building Airport Shuttle firmware can be found here: https://github.com/AeternusCo/zmk-old/tree/airport-shuttle
After prototype rev 1.0 units were sent out it was discovered that many users had a hard time fitting batteries underneath the PCB in standard tray mount MiniVan cases. As a result, Trash Man and Aeternus Decorum created a modified Rackmount case that included cutouts in the bottom that increased clearance for the Bluetooth module and added a large battery well. The battery well was sized to accomidate a large 2500 mAh battery that Trash Man owned which can be purchased here: https://www.amazon.com/dp/product/B07BTTRCTT
KLE available here: http://www.keyboard-layout-editor.com/#/gists/0cb516eb2df2197c8e05b5d9dc1ed00e
KLE available here: http://www.keyboard-layout-editor.com/#/gists/8dc7fedd72829d0043b96bb1399fbda1
Revision 1.75 adds support for several rotary encoder locations. While multiple encoders can be physically installed, all encoder positions are wired together and activate the same function when operated. The encoder positions are:
There have been two revisions of the Airport Shuttle PCB.
Only a handful of the original prototype PCBs were produced and sld to early adopter community members after they were confirmed working.
The front of the initial PCBs featured the name of the board silkscreened in gold against a blue solder mask. The letters "AD" were included in the top-right corner below the backspace switch position.
The updated revision 1.75 PCBs adds support for rotary encoders in several locations. A cutout is situated underneath the Bluetooth module to provide better signal integrity for the antenna (the R1 PCB had no copper fill in this area but still had PCB material). A larger 12x30mm cutout is located between the spacebar and arrow cluster to provide space to install a small battery in cases that do not have enough clearance below the PCB. The largest battery that will fit in the cutout is a 301230 lithium polymer battery. They can be found on most sites that sell nice!nano PCBs like KeyHive and Clawsome as well as Amazon.
Many of the small batteries that will fit in the battery cutout do not have long enough included leads to reach the battery solder points in the middle of the PCB (below the B key). To assist with installation a small PCB was created that can be soldered to the battery pads on the PCB and extends toward the battery cutout. This extra PCB was included with every order.
In order to improve the durability of the USB connector, a small portion of the PCB extends out below the connector to reinforce the solder anchors. Unfortunately, this tiny extra PCB section causes interference with many cases that have tight-fitting USB-C cutouts, such as plastic tray-mount cases and MHKB.