ELECTRONICS — CONCEPTS & SCHEMATICS
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DATASHEETS — RECENT ADDITIONS
140+ entries
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HISTORICAL DOCUMENTS
Public domain
US Patent No. 174,465 — A. G. Bell, 1876
Original telephone patent filing. Drawings, description, and claims.
Public domain
Morse's letter to Alfred Vail, 1838
Description of the original dot-dash telegraph code. Primary source.
Public domain
Maxwell's Treatise on Electricity & Magnetism (1873)
Foundational mathematical framework for electromagnetic theory.
Public domain
ITU Radio Regulations — Baudot Code Tables
Original Baudot 5-bit code assignment tables from ITU archives.
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