Hobby or Professional?
Both tracks teach the same core idea — a connector is a controlled interface. The difference is what happens when it fails, where it lives, and who has to build, inspect, or maintain it. Use this table when the landing-page quick check isn't enough.
| Situation | Use hobby guide | Use professional guide |
|---|---|---|
| Breadboard/dev-board experiment | Yes | Optional |
| One-off desk project | Yes | Optional |
| Student lab project | Yes | Optional |
| LED decoration | Yes | Maybe |
| High-current LED installation | Maybe | Yes |
| Outdoor sensor | Maybe | Yes |
| Robot exposed to vibration | Maybe | Yes |
| Product for someone else | No | Yes |
| Customer-facing hardware | No | Yes |
| Safety-critical hardware | No | Yes |
| Harness drawing required | No | Yes |
| Inspection/acceptance required | No | Yes |
| Qualification/standard required | No | Yes |
note
The boundary is not about whether a connector is "fancy." It is about consequence of failure, environment, documentation, repeatability, and who has to build or maintain it.
Two practical corollaries:
- Judge interface by interface, not project by project. A robot's I2C sensor cluster can stay on the hobby track while its battery interface and external cabling graduate — see When Hobby Connectors Are Not Enough.
- "Maybe" rows usually mean "hobby parts, engineering discipline." An outdoor LED decoration can keep hobby-class connectors if you apply the engineering questions — sealing condition, current calculation, strain relief — from the selection workflow or the rugged-on-a-budget path.
Start pages: Hobby Connector Field Guide · Professional / Industrial Connector Field Guide.