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'''Tricks and tips for ElectronicDesign''' ---- '''Eagle''' Eagle has scriptability. Eg moving components is possible with simple commands. However, moving connected traces and vias can be a problem. ---- '''Circular placement''' Let's assume we want to place 10 or 11 pads on a circle (centered 0,0 - offsetting is really simple). In the example: * 22mm from the center * 2.54mm from each other The octave (matlab) formula would be: <code> r=22; dist=2.54; # calculate the half of base angle in radian: ang=dist / r / 2 ; # Let's make a vector with some values: a=[0 : ang : 0.6]; # now let's see the coordinates in mil units # Since r is in mm, # we apply the * (1 / 0.0254 ) constantmultiplier to get mils: b= r / 0.0254 .*[sin(a); cos(a)] </code> * x: '''0.00000''' 49.97223 '''99.78''' 149.25133 '''198.23''' 246.54314 '''294.04''' 340.55225 '''385.93''' 430.02692 '''472.69''' * y: '''866.14''' 864.69895 '''860.36''' 853.18553 '''843.15''' 830.31198 '''814.70''' 796.38286 '''775.41''' 751.84995 '''725.79''' * Naturally, mirroring around the X is just a - sign. * Also, only the bold coordinates are used (for 11 pads) or only the non-bold ones (for 10 pads). * You can easily verify with Pithagoras formulat that x^2 + y^2 = 866.14^2 for every coordinate-pair * and distance of neighbour bold (or non-bold) coordinates is appr. 100 mil Similar, but slightly different values and formatting: <code> # in mil: r=895; dist=100; # calculate the half of base angle in radian: ang=dist / r / 2 ; a=[0 : ang : 0.6]; b= r .*[cos(a); sin(a)]' </code> * 895.00000 0.00000 * 893.60372 49.97400 * 889.41922 99.79206 * 882.45956 149.29876 * 872.74647 198.33962 * 860.31024 246.76162 * 845.18968 294.41367 * 827.43196 341.14710 * 807.09251 386.81609 * 784.23477 431.27814 * 758.93007 474.39451
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Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.