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.
After prototype 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
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 will add support for rotary encoders in several locations as well as including a 12x30mm cutout in the PCB between the spacebar and arrow cluster. The goal of the cutout is to provide space for a small battery to be mounted in order to improve compatibility with cases that do not have enough clearance below the PCB for a battery to be installed.
Revision 1.75 boards were sold through a small group buy hosted on both Aeternus Decorum's Discord server and the
#vaporware channel on the 40% Keyboards Discord server.