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Brainy

Brainy was the internal rack for the compute module. It kept the equipment together while Lunchy's covers were removed, and gave each device a defined mounting position instead of relying on the enclosure walls.

Brainy and its internal equipment

What It Carried

The submitted package included the Jetson AGX Orin, Xsens MTi-680-family navigation unit, GNSS antenna, network equipment and LiDAR interface box. The supporting CAD includes Jetson.STEP, MTi-680G.STEP, ANT-GNSS-RTK-TALLYSMAN-TW8889.SLDPRT and Lidar Box.SLDPRT under CAD/Mount/Brainy Components/.

Those models were useful for packaging, but a simplified device model did not capture every plug, cable bend or access requirement. The rear opening was kept available for I/O and servicing.

Rear access to Brainy

Connection to Lunchy

Brainy connected to Lunchy using 4 x M6. Captured nuts were used in printed interfaces where possible. Individual devices kept the fastener sizes appropriate to their own mounting holes or inserts.

The rack and shell were developed together, particularly around BrainyV3 and LunchyV8. Enlarging Lunchy addressed cable space as well as device fit. Brainy and the Zed2i holder formed the printed minimum competition package before the outer shell was completed (July 2026).

This separation also made damage easier to deal with: replacing a cover did not require redesigning the rack, and a rack change could be checked inside the existing enclosure.

Files

The main folder is CAD/Mount/Brainy (Computer Chassis)/.

File Use
Brainy Assembly.SLDASM Rack overview
Brainy Assembly Heavy.SLDASM More detailed assembly reference
Brainy and Lunchy Assembly.SLDASM Rack-to-shell fit
Brainy.SLDPRT Rack part
Brainy Split to Explode.SLDPRT Exploded presentation work, not automatically a print master
Brainy Prototypes/BrainyV3/BrainyAssembled.SLDASM V3 development assembly
Brainy_ReleaseCandidate1.STL through Brainy_ReleaseCandidate3.STL Print iterations; compare before choosing one

Reusing the Design

Check the actual device revision, rear connectors, cable bend space and access to the M6 fixings. Fit the rack into the matching Lunchy assembly before changing either part. Leave airflow around the compute hardware and avoid supporting equipment through a hot surface or a connector.

The intended removable package was not a universal drop-in module for every FT vehicle. A direct swap to the team's ADS car had different space constraints; reuse of its components did not establish that the complete box would fit.