Electronic circuit schematics, manuals, books, datasheets. Since Y2K.
For over twenty years schems.com ran unmetered, completely open and free. The outcome may have been up to millions of downloads across inumerable terabytes; zero donations. Growing Internet ensures wanton grabbing and gobbling: With google and Yahoo among the greediest by large margin, most but not all pointless hourly pillage was by search-engines, robots, crawlers, spiders. Proven yet again: Things free for granted and taken fully they be.
Self-defense from the burgeoning onslaught requires technical judo via rate limiting, download counts, access controls: Bottomless automatons now enjoy generic promo via ad-laden pages, and as quickly and painlessly as feasible humans may gain access with login or download tokens.
17 Apr 2025 -- New format underway; data is loading; up soon. Archives grown substantially.