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Add origin story: Major born from failing elevator harness

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- Endz: origin after roboRIO, taps 12V for CANcoders
- Major: designed for elevators/extensions with failing cable bundles
- Project birth: elevator power harness failed regularly with motion
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MrC
2026-05-04 01:57:52 +00:00
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@@ -37,11 +37,17 @@ Three Canjector variants. **Names are printed on the physical PCBs.**
All variants support configurable termination via a shunt jumper — populate the shunt to activate 120Ω termination anywhere in the chain.
| PCB Name | CAN ports | 12V outs | Role |
|----------|-----------|----------|------|
| **Endz** | 1 | 1 | Origin — first device in chain, PDH side |
| **Endz** | 1 | 1 | Origin — first device in chain, after roboRIO |
| **Minor** | 3 | 1 | Mid-chain — single wheel (CANcoder + 2 motors) |
| **Major** | 6 | 2 | Heavy distribution — end of main runs |
| **Major** | 6 | 2 | Elevators, extensions, heavy multi-motor mechanisms |
### Start/Endz — Origin Device
First device in the chain, right after the roboRIO. Taps 12V power directly for CANcoder feedback devices. Serves as the entry point for the entire CAN bus on the robot.
### Major — Elevator/Extension Design
Designed forelevators and extensions — large multi-motor mechanisms with bundled power + signal cables that fail regularly with motion. **This was the birth of the Canjector project** — Team 2890 had an elevator with a power harness (bundle of cables for power and signal) that failed repeatedly due to mechanical stress from motion. Major provides centralized distribution for those cables, replacing the fragile bundled harness with modular connectors.
### Minor — Single Wheel Module