Connector Field Guides

Practical connector selection without the folklore, forum archaeology, and "looks close enough" nonsense.

Two guides, one site. Pick the one that matches what you're building. They cross-link where it matters, and they both follow the same rule: the datasheet, standard, and requirement always win over anything written here.

v1.0 — Source-Verified Release

The source-verification milestone shipped with v1.0; the guide is continuously reviewed after it. Source Notes is the standing record of what is verified, what is engineering judgment, and what you still owe your own hardware. Corrections — with sources — are welcome.

Board-levelFFC / ZIF identification Zeroping · CC0 Compact, high-densityMicro-D selection Andree.sk · CC BY-SA 4.0 Industrial sensorM12 / M8 interfaces Riep. · CC BY-SA 4.0 Sealed feedthroughCable-entry construction Leotard · CC0

Four interfaces, four different jobs. Follow a panel into the relevant guide, or see the complete image attribution register.

Maker / Hobby

Hobby Connector Field Guide

For makers, students, Arduino/Raspberry Pi/ESP32/Pico projects, 3D printers, RC, LEDs, sensors, small robots, home automation, and prototype wiring.

Learn to identify mystery connectors · untangle JST-family confusion · choose connectors for sensors, LEDs, batteries, servos, and dev boards · buy the right mating parts · crimp without losing your mind · know when hobby connectors are not enough

Enter the Hobby Guide →

Engineering / Production

Professional / Industrial Connector Field Guide

For electromechanical systems, industrial equipment, robotics platforms, sealed enclosures, released harnesses, design reviews, and production hardware.

Covers requirements and ratings · environment and derating · standards and qualification · cable drawings and connector ICDs · tooling and workmanship · lifecycle and field-service risk

Enter the Engineering Guide →

Not sure?

Question	Hobby guide	Engineering guide
Is this a breadboard/dev-board project?	Yes	Maybe
Is this going outside, on a vehicle, or into fielded equipment?	Maybe	Yes
Is failure annoying but safe?	Yes	Maybe
Is failure expensive, dangerous, or customer-facing?	No	Yes
Are you buying connector kits online?	Yes	Maybe
Are you making released drawings, ICDs, or harness documentation?	No	Yes
Does someone else need to build, inspect, or maintain it?	Maybe	Yes

Still torn? Read Hobby or Professional?. The real dividing line is what failure costs, where the hardware lives, and how tightly it has to be documented—not how fancy the connector looks.

Both tracks share the Source Notes—where the site shows its work—the Glossary, and the Connector Identification Workflow.

Onboarding someone? How to Use This Guide with an Intern turns the reading, exercises, and templates into a four-week plan you can actually run.