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Engineering Tools, Calculations & Reference Materials  Preferred Resource.
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Current Solutions, Inc. The web-site of this power supply distributor has a number of calculators for various electrical quantities and heat sinking requirements. Also has reference information for world AC power standards and connectors. Steven Henderson's Cutting Edge Designs Site. Has calculators for acceleration, area, force, length, power, pressure, torque, velocity, volume, volumetric flow, weight, temperature, thread & tap guide, metal gage chart, hardness conversion chart, periodic table, units dictionary, currency conversion, etc. Also has an extensive directory section. Techdata. M.J. Van Voorhis' Engineering data reference tables for materials, sections, fasteners, etc. Quite extensive. That’s an Idea. Invention and patent advice for both amateurs and professionals.
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