DigiKey's closest competitor — similar parametric search and selection. Worth checking both since stock and pricing vary, especially on European part numbers.
5 boards for $2 is still the deal it sounds like. The go-to for prototype PCBs when you need fast turnaround and don't need tight tolerances.
The best structured learning path for ROS — courses go from zero to autonomous navigation without requiring a physical robot. Simulation-first approach that actually prepares you for hardware.
The professional CAD/CAM tool that is actually free for hobbyists. Parametric modeling, integrated CAM, and simulation in one package — the right tool when FreeCAD falls short.
Limor Fried built the gold standard for maker electronics — tutorials that actually teach you why something works, components you can trust, and a community that welcomes beginners without dumbing things down.
The other pillar of maker electronics. Strong on tutorials for getting hardware talking to each other, and their breakout boards save hours of low-level wiring work.
Dave Jones's teardown and test series is required viewing if you're serious about electronics engineering. The forum is one of the best technical communities online.
Free electrical engineering textbooks plus a reference library covering everything from Ohm's law to op-amp design. Better organized than most university course material.
Stefan's material science breakdowns changed how the community thinks about print settings. If you want to understand why your prints fail, not just fix them, start here.
Honest hardware reviews and practical how-to guides without the affiliate-link rot that plagues most 3D printing content. Good for buying decisions and troubleshooting.
The standard framework for robotics — used in research labs, autonomous vehicles, and industrial systems. Steep learning curve, but unavoidable if you're building anything real.
Project showcase and tutorial platform with a high signal-to-noise ratio. Good for seeing how others have wired up sensors and actuators before you start.
Every hardware engineer's open secret — the catalog has STEP models for most parts, so you can drop a real McMaster bolt into your assembly and order it the same day.
The open-source parametric CAD that's finally worth using seriously. Slower than the commercial tools but free, cross-platform, and improving fast.
JLCPCB's component storefront. Dramatically cheaper than Western distributors for passives and common ICs — the go-to for keeping PCB BOM costs sane.
Small-batch PCB fabrication that makes beautiful purple boards. Per-board pricing that makes sense for runs under 50, with genuinely excellent fab quality.
The reference publication for hand-tool and power-tool woodworking. Dense, technique-focused, and doesn't talk down to you. Worth the subscription.
Species reference for when you need to know whether a board can hold a mortise or how it'll move with humidity. Free, thorough, and frequently cited.
Industry forum for professional woodworkers and serious hobbyists. The finishing and machinery forums are particularly deep and active.
The platform that opened hardware to everyone — still the fastest path from idea to blinking LED. The reference docs and project hub have aged well.
The open-source PCB design suite that closed the gap with Altium. Schematic capture, layout, and 3D preview without a subscription — the right choice for most projects.
Adafruit's Python port for microcontrollers makes hardware accessible without C. The best on-ramp for software developers crossing into embedded.
The visual troubleshooting reference that still gets linked in every 3D printing community when something goes wrong. Faster than forum posts for diagnosing common print defects.
Motor drivers, encoders, and chassis hardware that doesn't require reverse-engineering a datasheet to use. The go-to supplier when you need robotics hardware that works the first time.
A fully documented 6-wheel rover build based on the Curiosity design. The build guides are exceptional and the BOM is achievable without aerospace budgets.
Far more than a 3D art tool — the mesh modeling, sculpting, and precision modeling workflows are legitimate for engineering visualization and concept design.
Parametric CAD through Python code — if you think in scripts rather than GUI, this is the path to fully repeatable, version-controlled mechanical design.
On-demand manufacturing in materials you can't print at home — nylon, metal, ceramic. Good for production-quality parts when your desktop machine hits its limits.
The long tail of components at a fraction of Western prices — essential for prototyping when you need quantity or unusual parts. Factor in 2-4 week shipping and variable quality.
The best case for hand-tool woodworking online — methodical, clear, and built around skills that transfer rather than specific tool purchases. His joinery series alone is worth hours of study.
American-made hand tools built to last a generation. The product pages double as a reference on what premium tool geometry and fit actually look like — useful even if you're not buying.
The physical and online store that serious woodworkers actually use — well-curated tool selection with staff who know the craft. Good for buying decisions when you need to handle it first.
Active woodworking forum with decades of archived threads on finishing, machinery repair, and joinery. The kind of niche community knowledge that does not survive on mainstream platforms.
Independent tool retailer with an editorial bent — their blog and buying guides are genuinely useful, not just catalog filler. One of the few places to get honest tool comparisons.
The professional network behind the profession — job boards, school coverage, and community forums that matter if you work in architecture.
Product and interior design coverage with an eye for the emerging — consistently surfaces objects and spaces before they become mainstream.
Practical interior design for real homes at real budgets. One of the few shelter publications that actually helps people make decisions.
The world's most visited architecture website — a deep index of buildings, projects, and practice-level writing that treats architecture as a living discipline.
The go-to reference when you need to know if a sectional actually fits — dimensioned drawings for thousands of standard objects, spaces, and typologies.