Tool Plans

10 Free PCB layout design software ZenitPCB – is an excellent pcb layout software tool to create professional printed circuit board ( PCB ). It is a flexible easy to use CAD program, which allow you to realize your projects in a short time. With ZenitPCB Layout is possible to create the project starting both [...]

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Angle Units: ° r Angle: Side: Side: Angle: Side: Angle: Triangle Calculator Instructions Enter values three of the six sides and angles of the triangle and the other three values will be computed. The number of significant values entered will determine the number of significant figures in the results.  

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GRAPHICAL RESISTANCE CALCULATOR in JAVASCRIPT Version 2.2 by Danny Goodman, AE9F (www.dannyg.com) Analyzed and described at length in “JavaScript Bible” ”

Print graph paper to your specifications. A handy site that gets lots of use. http://incompetech.com/graphpaper/ Squares Grid Multi-weight Grid Dots Crosses Light Verticals Grid Lined Axonometric Perspective Triangle and Hexagonal Equilateral Triangle Octagonal Hexagonal Hex Dot Semi-bisected Trapezoid Iso-Dots Tumbling Block Diamond – Trapezoid Equilateral Triangle Dots Variable Triangle   Circular and Polar Circular – [...]

A well developed fully mature 2D CAD release. Description LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation is free from our large, dedicated community of users, contributors and developers. You, too, can also get involved! LibreCAD Web Site

While some of the big name pay software is rather large and slow this is a very nice free program. Description FreeCAD is a general purpose Open Source 3D CAD/MCAD/CAx/CAE/PLM modeler, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering [...]

Standard formula for calculating bend allowance.