mirror of
https://github.com/nophead/NopSCADlib.git
synced 2025-09-17 18:52:10 +02:00
46 lines
1.5 KiB
OpenSCAD
46 lines
1.5 KiB
OpenSCAD
//
|
|
//! Environmental monitor using Enviro+ sensor board and a Raspberry Pi Zero.
|
|
//
|
|
// GNU GPL v2
|
|
// nop.head@gmail.com
|
|
// hydraraptor.blogspot.com
|
|
//
|
|
// Top level model
|
|
//
|
|
|
|
include <NopSCADlib/core.scad>
|
|
use <NopSCADlib/vitamins/veroboard.scad>
|
|
include <NopSCADlib/vitamins/smds.scad>
|
|
|
|
fan_vb = vero("fan_vb", "fan_controller", 6, 6, breaks = [[2, 1], [2 + eps, 5]],
|
|
components = [
|
|
[5, 3, 90, "link", inch(0.4), undef, undef, 2.5],
|
|
[0, 5, 0, "link", 0, 4, undef, 2.5],
|
|
[0, 1, 0, "link", 0, 4, undef, 2.5],
|
|
[0, 0, 0, "link", 0, 4, undef, 2.5],
|
|
[2, 5, 0, "-smd_res", RES0805, "3K3"],
|
|
[4, 4.7, 90, "-smd_cap", CAP1206, 1.2, "10uF"],
|
|
[2, 2.5, 180, "-smd_sot", SOT223, "FZT851"],
|
|
],
|
|
joints = [[5, 1], [5, 5], [0, [0, 1, 5]]]
|
|
);
|
|
|
|
//! The fan controller is a single transistor wired as a Miller integrator that effectively multiplies the capacitor value by the gain of the transistor.
|
|
//! It converts the PWM signal on GPI4 to a stead DC voltage so that the fan doesn't whine, or stutter.
|
|
//!
|
|
//! 
|
|
//!
|
|
//! ***
|
|
//! * Make two track cuts as shown, one wide and the other narrow.
|
|
//!
|
|
//! 
|
|
//!
|
|
//! 1. Add the SMT compeonents and then the wire links.
|
|
//! 1. Add more solder around the transistor to act as a heatsink.
|
|
//!
|
|
//! 
|
|
//!
|
|
module fan_controller_assembly() rotate(90) vflip(!exploded()) veroboard_assembly(fan_vb, -vero_thickness(fan_vb) - 1.4, 0);
|
|
|
|
fan_controller_assembly();
|