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74293b6c22
Verboard and perboard components get solder menisci added automatically. Radial leads now made by bezier curves rather than straights and arcs.
44 lines
1.5 KiB
OpenSCAD
44 lines
1.5 KiB
OpenSCAD
//
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//! Environmental monitor using Enviro+ sensor board and a Raspberry Pi Zero.
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//
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// GNU GPL v2
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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// Top level model
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//
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include <NopSCADlib/core.scad>
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use <NopSCADlib/vitamins/veroboard.scad>
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include <NopSCADlib/vitamins/smds.scad>
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fan_vb = vero("fan_vb", "fan_controller", 6, 6, breaks = [[2, 1], [2 + eps, 5]],
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components = [
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[5, 3, 90, "link", inch(0.4), undef, undef, 2.5],
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[0, 5, 0, "link", 0, 4, undef, 2.5],
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[0, 1, 0, "link", 0, 4, undef, 2.5],
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[0, 0, 0, "link", 0, 4, undef, 2.5],
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[2, 5, 0, "-smd_res", RES0805, "3K3"],
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[4, 4.5, 90, "-smd_cap", CAP1206, 1.2, "10uF"],
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[2, 2.5, 180, "-smd_sot", SOT223, "FZT851"],
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]
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);
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//! The fan controller is a single transistor wired as a Miller integrator that effectively multiplies the capacitor value by the gain of the transistor.
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//! It converts the PWM signal on GPI4 to a stead DC voltage so that the fan doesn't whine, or stutter.
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//!
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//! 
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//!
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//! ***
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//! * Make two track cuts as shown, one wide and the other narrow.
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//!
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//! 
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//!
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//! 1. Add the SMT compeonents and then the wire links.
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//! 1. Add more solder around the transistor to act as a heatsink.
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//!
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//! 
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//!
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module fan_controller_assembly() rotate(90) vflip() veroboard_fastened_assembly(fan_vb, -vero_thickness(fan_vb) - 1.4, 0);
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fan_controller_assembly();
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