Built to Fail or Built to Scale?
Get Aligned Before You Build
Clarity, not guesswork.
These resources help you define, diagnose, and de-risk your next move
—before a single prototype is powered on.
Everything below is created by Celtic Engineering Solutions, LLC and Sean O’Leary, PE, a licensed electrical engineer specializing in early-stage product development.
Trusted by startups and technical leads.
Everything here is designed to help you move from idea to outcome without wasting time.
Simple tools. Smarter decisions. Fewer failures.
Whether you're defining scope, preparing to prototype, or troubleshooting along the way, these checklists and tools are built to move you forward—without the fluff.
Too many projects fail early for the same 5 reasons—and all of them are preventable. This one-page checklist shows what to fix before you build, helping you avoid costly mistakes, blown timelines, and bad assumptions that cause real damage later.
If you don’t have a PRD, SOW, or Quote, you’re not ready to build—and engineers won’t take you seriously. This starter toolkit gives you all three in editable format, so you can scope your project, request a quote, and move forward with clarity.
Some ideas need refinement before they’re ready. This short quiz gives you a buildability score plus a PDF result that tells you what’s missing, what’s strong, and what to do next. It’s fast, honest, and designed to help you avoid expensive rework.
Most people underestimate the time it takes to go from idea to working prototype. This simple visual timeline breaks it down by stage—and shows where delays happen and how to avoid them. Know what to expect before your project derails.
Not all quotes are the same. This annotated sample explains what each section means, what’s often missing, and how to compare engineering proposals with clarity. Use it to avoid vague pricing, misaligned expectations, and hidden costs.
Engineers see these same seven issues in client docs—missing specs, vague diagrams, unclear requirements—and they slow everything down. Use this checklist to catch and fix them early so you don’t waste time or blow your first impression.
When every amp matters, guessing trace widths is a gamble you can’t afford. Our PCB Trace Calculator takes the guesswork out of design by giving you instant, reliable results for both external and internal copper layers—directly from the IPC-2221 standard. Whether you’re routing a half-amp sensor line or pushing ten amps through power rails, this tool shows you exactly how wide your trace must be—or how much current your trace can safely carry. Built for engineers who want speed, accuracy, and peace of mind, it’s a resource you’ll return to every time you design a board.
Engineers see these same seven issues in client docs—missing specs, vague diagrams, unclear requirements—and they slow everything down. Use this checklist to catch and fix them early so you don’t waste time or blow your first impression.
