The World's Largest Free Schematic Library — Now With AI Circuit Analysis

Many thousands of schematic diagrams spanning numerous brands and manufacturers — vintage hi-fi, pro audio, consumer electronics, guitar amps, tube gear, and more. Every schematic is free to view, page by page, at full resolution. No sign-up. No PDF download. No nonsense.

🔬 Introducing AI Circuit Analysis — our master-engineer AI reads each schematic page and tells you exactly what you're looking at: signal path, stage-by-stage operation, component roles, known failure modes, repair tips, and design quirks. The kind of insight that used to live only in the heads of 40-year bench veterans. Now on every page.

Search by brand, model, or part number. Find the schematic. Understand the circuit. Fix the gear. Schems.com — built by techs, for techs.