Spectrum 3847
Seasons
Explore 15 seasons of Spectrum 3847 FRC robots from 2012 to 2026 — robot photos, Onshape CAD models, code repositories, and build blogs.
The team first competed in FRC in 2011, before taking the Spectrum name, and has built a robot every season since 2012. Each season page below collects the CAD model, the code repository, the build blog, the competition record, and photos.
Robot names cycle through the electromagnetic spectrum — Ultraviolet → Gamma Ray → Infrared → X-Ray — which is where the team name comes from. The cycle has run unbroken since 2012, though 2021’s Gamma Ray was built by our development team, Photon 8515: the 2020 and 2021 games were nearly identical, so 3847 competed with its 2020 robot rather than building a new one. From 2022 onward, 3847 and 8515 each build their own robot every season.
InfraredRebuiltREBUILT season CAD, WPILib Java project, and subsystem design specifications.
Gamma RayReefscapeREEFSCAPE robot details, Onshape 3D CAD assembly, code, and match analysis.
UltravioletCrescendoShooter geometry, under-bumper intake, and Texas District Championship recaps.
X-RayCharged UpArm mechanism, suction gripper testing, swerve code, and division finals.
InfraredRapid ReactDual-flywheel cargo shooter, climber prototyping, and State Championship recaps.
Gamma RayInfinite Recharge @ HomeBuilt by Photon 8515 — 3847 competed with its 2020 robot, since the 2020 and 2021 games were nearly the same. Skills challenge CAD and autonomous routines.
UltravioletInfinite RechargeHigh-capacity power cell hopper, turret control, and shooter flywheel tuning.
X-RayDestination: Deep SpaceHatch panel and cargo mechanisms, elevator rigging, and rules change log.
InfraredPower UpPower cube intake prototyping, elevator gearbox design, and competition recaps.
Gamma RaySteamworksFuel shooter design, gear placer prototyping, climber, and full CAD releases.
UltravioletStrongholdDefense-crossing chassis, boulder intake, and catapult mechanism logs.
X-RayRecycle RushTote elevator, container hook design, and pneumatic system logs.
InfraredAerial AssistLauncher and collector prototypes, ball handling geometry, and build log.
Gamma RayUltimate AscentFrisbee shooter design, pyramid climber, and full CAD releases.
UltravioletRebound RumbleOur inaugural robot — basketball collector and alliance strategy.