synth_tools

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See http://www.kerrywong.com/2014/03/19/bjt-in-reverse-avalanche-mode/ for the articles! Smoothing_radius = 3; difference() { union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=thickness+standoff_height, r=standoff_radius, $fn=360); cube([cutout_width, cutout_height, thickness+3]); cylinder(h=thickness+standoff_height+3, r=hole_radius, $fn=360); vertex 0 7.5203 6.0001 facet normal 1.376774e-01 2.053091e-04 -9.904771e-01 facet normal 8.195459e-001 -5.730135e-001 0.000000e+000 vertex -5.642653e+000 5.844130e-002 2.496000e+001 vertex 5.358002e+000 -1.912462e+000 1.747200e+001 facet normal -6.586177e-001 -2.932776e-003 7.524720e-001 vertex -4.086454e+000 -8.727611e-001 2.488700e+001 facet normal -0.462456 0.449684 0.764146 facet normal 0.94716 0.0961108 0.306023 vertex 6.33566 0 7.50886 vertex 4.6363 -4.35153 7.51116 vertex -4.43402 -4.43402 7.71007 facet normal 0.991524 -0.109217 0.0703647 facet normal -0.528237 0.643667 0.553767 facet normal 0.488315 -0.595017 -0.63836 vertex 4.24264 4.24264 6.59 facet normal -0.000000e+00 -1.000000e+00 -7.973511e-07 facet normal 4.203270e-16 -1.856182e-15 -1.000000e+00 facet normal 0.877714 -0.469146 0.0975761 vertex -8.28616 3.49795 4.51215 facet normal 0.22241 -0.884711 0.409659 facet normal -0.528276 -0.575172 0.624582 facet normal 0.956943 0.290276 0 facet normal 0.0816517 0.0813929 0.993332 vertex -4.77144 4.18796 7.82405 facet normal 0.946346 -0.307482 0.0994132 facet normal 0.976261 0.0729941 0.203926 vertex -7.21514 -1.03118 7.67586 vertex 4.38745 5.82788 7.61242 vertex -5.83103 -4.37272 7.67586 facet normal 4.496506e-001 7.868878e-001 4.226369e-001 vertex -2.491548e+000 -4.438239e+000 2.480400e+001 facet normal -4.928162e-001 -8.630844e-001 1.105331e-001 vertex 1.623551e+000 4.832249e+000 2.470218e+001 facet normal -4.302867e-01 -9.026922e-01 3.403545e-04 vertex -1.006585e+02 9.249709e+01 4.255000e+01 facet normal 0.0973393 -0.995186 0.0113559 vertex -5.71699 1.07374 21.335 vertex 5.69312 1.19444 21.335 facet normal -0.346106 -0.295595 0.890412 facet normal -0.55274 -0.109731 -0.826098 vertex 2.84551 0.566007 18.8953 facet normal -0 -0.95694 -0.290284 vertex 0.800782 3.26571 14.9643 vertex -1.45059 3.07081 8.75682 facet normal 0.000105909 -0.956911 -0.290382 vertex 1.31069 3.16429.

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