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improve readme + update sma_rigid + add PDM hat for mchstreamer

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This commit is contained in:
Pierre Lecomte 2024-07-25 18:53:21 -07:00
parent 04f51d2afb
commit 7f8b49fd21
14 changed files with 17918 additions and 59 deletions
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2
README.md
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@ -23,7 +23,7 @@ See the documentation in `.scad` files to create or customize a SMA design.
A tutorial on how to build a SMA using the SMALL library is available here:
to do
https://www.sekisushai.net/ambitools/2024/07/25/small.html
If you build a prototype by using the SMALL library, let me know :-) sekisushai@gmail.com

62
cad/sma_rigid.json
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@ -31,24 +31,6 @@
"screw_phi_offset": "0",
"theta": "[0, 180, 63.4349, 116.565, 116.565, 63.4349, 116.565, 63.4349, 63.4349, 116.565]"
},
"lebedev14": {
"angle_max": "82",
"angle_min": "75",
"d_hole": "10",
"d_screw": "3",
"dir_thread": "[13, 0]",
"e": "6",
"hole_phi_offset": "45",
"mic_type": "1\/4",
"mics_rotate": "[-90, 0, 0]",
"n_screw": "4",
"phi": "[0, 0, 90, 180, 270, 0, 45, 135, 225, 315, 45, 135, 225, 315]",
"r": "60",
"res": "32",
"screw_phi_offset": "0",
"theta": "[0, 90, 90, 90, 90, 180, 54.7356, 54.7356, 54.7356, 54.7356, 125.264, 125.264, 125.264, 125.264]",
"usb_card": "false"
},
"mclaren30": {
"angle_max": "72",
"angle_min": "65",
@ -70,17 +52,53 @@
"angle_min": "87",
"d_hole": "10",
"d_screw": "3",
"dir_thread": "[15, 0]",
"e": "5",
"hole_phi_offset": "15",
"mic_type": "TDM",
"mics_rotate": "[0, 0, 0]",
"n_screw": "4",
"phi": "[0, 72, 108, 144, 180, 216, 252, 288, 324, 0, 36, 0, 252, 288, 324, 0, 36, 72, 108, 144, 180, 216]",
"r": "60",
"res": "32",
"screw_phi_offset": "45",
"theta": "[0, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 180, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045]",
"usb_card": "true"
},
"lebedev14_2": {
"angle_max": "82",
"angle_min": "75",
"d_hole": "10",
"d_screw": "3",
"dir_thread": "[13, 0]",
"e": "6",
"hole_phi_offset": "45",
"mic_type": "1\/4",
"mics_rotate": "[0, 0, 0]",
"mics_rotate": "[-90, 0, 0]",
"n_screw": "4",
"phi": "[0, 72, 108, 144, 180, 216, 252, 288, 324, 0, 36, 0, 252, 288, 324, 0, 36, 72, 108, 144, 180, 216]",
"r": "55",
"phi": "[0, 0, 90, 180, 270, 0, 45, 135, 225, 315, 45, 135, 225, 315]",
"r": "60",
"res": "32",
"screw_phi_offset": "0",
"theta": "[0, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 46.7442, 79.9551, 180, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045, 133.256, 100.045]",
"theta": "[0, 90, 90, 90, 90, 180, 54.7356, 54.7356, 54.7356, 54.7356, 125.264, 125.264, 125.264, 125.264]",
"usb_card": "false"
},
"lebedev14": {
"angle_max": "80",
"angle_min": "70",
"d_hole": "10",
"d_screw": "3",
"dir_thread": "[20, 0]",
"e": "5",
"hole_phi_offset": "135",
"mic_type": "PDM",
"mics_rotate": "[0, 0, 0]",
"n_screw": "4",
"phi": "[0, 0, 90, 180, 270, 0, 45, 135, 225, 315, 45, 135, 225, 315]",
"r": "45",
"res": "32",
"screw_phi_offset": "45",
"theta": "[0, 90, 90, 90, 90, 180, 54.7356, 54.7356, 54.7356, 54.7356, 125.264, 125.264, 125.264, 125.264]",
"usb_card": "true"
}
},

96
cad/sma_rigid.scad
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@ -1,14 +1,15 @@
/*
* Rigid SMA design
* Copyright 2023 Pierre Lecomte - sekisushai@gmail.com
* Copyright 2023-2024 Pierre Lecomte - sekisushai@gmail.com
*/
/*
The rigid SMA is composed of two hemispherical shells to render separately for 3D printing.
*/
//top_shell_all();
bottom_shell_all();
//bottom_shell_all();
top_shell_all();
// EDIT BELOW
/*[ Global parameters ]*/
@ -17,10 +18,10 @@ res = 32;
/*[ Array parameters ]*/
// sphere radius (mm):
r = 80;
r = 90.0;
// shell thickness (mm):
e = 6;
e = 5;
// microphones zenith coordinates (°):
theta = [0, 90, 90, 90, 90, 180, 54.7356, 54.7356, 54.7356, 54.7356, 125.264, 125.264, 125.264, 125.264];
@ -29,7 +30,7 @@ theta = [0, 90, 90, 90, 90, 180, 54.7356, 54.7356, 54.7356, 54.7356, 125.264, 12
phi = [0, 0, 90, 180, 270, 0, 45, 135, 225, 315, 45, 135, 225, 315];
// microphone type
mic_type = "1/4"; // [1/4:Quarter_Inch, PDM:PDM MEMS]
mic_type = "1/4"; // [1/4:Quarter_Inch, PDM:PDM MEMS, TDM:TDM MEMS]
// include USB sound card (only for digital MEMS mics)
usb_card = true;
@ -41,13 +42,13 @@ mics_rotate = [-90, 0, 0];
/*[ Cut parameters ]*/
// minimal zenith angle for the cut (°):
angle_min = 75;
angle_min = 74.5;
// maximal zenith angle for the cut (°):
angle_max = 82;
angle_max = 82.5;
// screws diameter, metric (mm):
d_screw = 3;
d_screw = 3.38;
// screws number
n_screw = 4;
@ -95,6 +96,7 @@ square([3.55, 1.1*e]);
}
}
// Adafruit PDM MEMS breakout.
// https://www.adafruit.com/product/3492
module pdm_breakout(l=14-5, w=13-5){
@ -129,28 +131,39 @@ linear_extrude(50){
translate([l/2,w/2,0])
circle(d=2);
}
translate([l/2,w/2,6+e/2+0.2])
sphere(r=e/2);
// wires
translate([0,0,5])
linear_extrude(2){
translate([l/2,w,0])
square([l+4,2.5],center=true);
}
linear_extrude(5){
difference(){
linear_extrude(7){
minkowski(){
square([l,w]);
circle(2.6);
}
}
translate([0,0,5])
linear_extrude(3){
translate([l/2,-w/2+2.5])
square([2*l,2*w],center=true);
}
}
}
}
module tdm(){
// custom breakout made by Emmanuel Flety
module tdm_breakout(){
mirror([0,0,-1])
translate([-9,-8,-0.9])
import("ICS-52000 v10.stl");
translate([0,0,2]){
cylinder(d=18,h=20);
translate([0,-0.4,0])
cube([7.5,12,20],center=true);
cube([10,13,1.5],center=true);
}
}
module mics(type){
rotate(mics_rotate)
@ -158,12 +171,14 @@ for (i = [0 : len(theta)-1]){
rotate([theta[i], 0, phi[i]])
translate([0, 0, r-e+1]){
if (type=="1/4")
b_k();
else
pdm_breakout();
translate([3,3,e-1.8])
{b_k();}
else if (type=="PDM")
{pdm_breakout();}
else
{tdm_breakout();}
translate([3,3,e-2])
linear_extrude(3)
text(str(i+1), size=3);
text(str(i+1), size=3, font = "Liberation Sans:style=Bold");
}
}
}
@ -182,7 +197,7 @@ module mchstreamer(){
translate([r-l_usb-attach_l/2,-w_usb/2,-h_usb/2])
union(){
cube(size = [l_usb, w_usb, h_usb], center = false);
plug_l = 20;
plug_l = 40;
plug_w = 12+adj;
plug_h = 10.7+adj;
translate([l_usb - plug_l/2, w_usb/2 - plug_w/2, 1.8+adj])
@ -195,16 +210,21 @@ module mchstreamer(){
cube(size=[attach_l, w_usb, 2.7]);
}
module attach(){
module attach(){
rotate([0, 90, 0]){
translate([-attach_w/2, attach_h/2, attach_l/2]){
union(){
cube(size=[attach_w, attach_h, attach_l], center = true);
cylinder(r=1.5, h=2*attach_l );
translate([0,0,attach_l/2+e])
cylinder(r=3,h=attach_l);
}
}}
}
rotate([20, -20, 0])
cylinder(d=3, h=r-1, $fn=64);
}
module bottom_shell(r1= r-e, r2=r-e/2, r3=r, delta=0.2) {
@ -244,6 +264,7 @@ cylinder(d=d+0.2,h=e);
param = d == 2 ? [1.6, 4.6, 1.2] : // M2
d == 2.5 ? [2, 5.8, 1.5] : // M2.5
d == 3 ? [2.4, 6.4, 1.7] : // M3
d == 3.38 ? [2.7, 8.8, 2.5] :// 6-32
d == 4 ? [3.2, 8.1, 2.3] : // M4
d == 5 ? [4, 9.2, 2.8] : // M5
d == 6 ? [5, 11.5, 3.3] : false; // M6
@ -260,24 +281,25 @@ cylinder(d=param[1]+0.2, h=param[0]+1, $fn=6);
module attach() {
rotate([(angle_min+angle_max)/2,0,hole_phi_offset]){
if (usb_card==false)
cylinder(d=d_hole, h=100);
else
cylinder(d=d_hole, h=r+2*e);
else{
mchstreamer();
}
}
rotate([(angle_min+angle_max)/2 + dir_thread[0],0, hole_phi_offset + dir_thread[1]])
translate([0,0,(r-3*e)])
render()
//rotate([(angle_min+angle_max)/2 + dir_thread[0],0, hole_phi_offset + dir_thread[1]])
//translate([0,0,(r-3*e)])
//render()
/*
Change here the type of threaded hole for mounting on a mic stand. See threads.scad file for help
*/
//english_thread(3/8,16,3.5*e/25.4,internal=true);
metric_thread (diameter=6, pitch=1, length=20);
//english_thread(1/4,20,3.5*e/25.4,internal=true);
//metric_thread (diameter=5, pitch=0.8, length=40);
}
module vis_all(){
for (i = [0 : n_screw-1]){
rotate([(angle_min+angle_max)/2, 0, i*90+screw_phi_offset])
rotate([(angle_min+angle_max)/2, 0, i*360/n_screw+screw_phi_offset])
translate([0,0,r-e])
vis();
}
@ -290,14 +312,15 @@ attach();
vis_all();
mics(mic_type);
}
}
module top_shell_all(){
difference(){
top_shell();
attach();
mics(mic_type);
vis_all();
attach();
}
}
@ -319,4 +342,5 @@ module test_mic(){
torus();
}
}
}
}

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mchstreamer/16-PDM/copper_bottom.gbr Normal file
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mchstreamer/16-PDM/copper_top.gbr Normal file
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mchstreamer/16-PDM/drill_1_16.xln Normal file
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@ -0,0 +1,82 @@
M48
;GenerationSoftware,Autodesk,EAGLE,9.6.2*%
;CreationDate,2024-05-31T14:51:57Z*%
FMAT,2
ICI,OFF
METRIC,TZ,000.000
T2C0.710
T1C1.016
%
G90
M71
T1
X14760Y22850
X25020Y22900
X19940Y27900
X22480Y27900
X25020Y27900
X27560Y27900
X19940Y22900
X22480Y22900
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X27560Y17900
X19940Y12900
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X25020Y12900
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X7140Y27900
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X12220Y27900
X14760Y27900
X7140Y22850
X9680Y22850
X12220Y22850
X7140Y17850
X9680Y17850
X12220Y17850
X14760Y17850
X7140Y12850
X9680Y12850
X12220Y12850
X14760Y12850
T2
X41450Y17000
X43450Y17000
X35950Y17000
X43450Y15000
X35950Y25000
X37950Y25000
X35950Y23000
X37950Y23000
X35950Y21000
X37950Y21000
X41450Y15000
X35950Y19000
X37950Y19000
X37950Y17000
X35950Y15000
X37950Y15000
X20000Y3600
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X18000Y3600
X18000Y1600
X16000Y3600
X16000Y1600
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X14000Y1600
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X41450Y23000
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X41450Y25000
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X41450Y21000
X43450Y21000
X41450Y19000
X43450Y19000
M30

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mchstreamer/16-PDM/gerber_job.gbrjob Normal file
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@ -0,0 +1,24 @@
{
"Header": {
"Comment": "All values are metric (mm)",
"CreationDate": "2024-05-31T14:51:57Z",
"GenerationSoftware": {
"Application": "EAGLE",
"Vendor": "Autodesk",
"Version": "9.6.2"
},
"Part": "Single"
},
"Overall": {
"BoardThickness": 0.396,
"LayerNumber": 2,
"Name": {
"ProjectId": "16-PDM"
},
"Owner": "Emmanuel Flety <flety@ircam.fr>",
"Size": {
"X": 45,
"Y": 40
}
}
}

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mchstreamer/16-PDM/profile.gbr Normal file
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@ -0,0 +1,24 @@
G04 EAGLE Gerber RS-274X export*
G75*
%MOMM*%
%FSLAX34Y34*%
%LPD*%
%IN*%
%IPPOS*%
%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*%
G01*
%ADD10C,0.254000*%
D10*
X0Y0D02*
X330000Y0D01*
X330000Y95000D01*
X450000Y95000D01*
X450000Y305000D01*
X330000Y305000D01*
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X0Y400000D01*
X0Y0D01*
M02*

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mchstreamer/16-PDM/silkscreen_bottom.gbr Normal file
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@ -0,0 +1,905 @@
G04 EAGLE Gerber RS-274X export*
G75*
%MOMM*%
%FSLAX34Y34*%
%LPD*%
%INSilkscreen Bottom*%
%IPPOS*%
%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*%
G01*
%ADD10C,0.200000*%
%ADD11C,0.101600*%
%ADD12C,0.025400*%
D10*
X335800Y265990D02*
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M02*

6000
mchstreamer/16-PDM/silkscreen_top.gbr Normal file
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117
mchstreamer/16-PDM/soldermask_bottom.gbr Normal file
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@ -0,0 +1,117 @@
G04 EAGLE Gerber RS-274X export*
G75*
%MOMM*%
%FSLAX34Y34*%
%LPD*%
%INSoldermask Bottom*%
%IPPOS*%
%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*%
G01*
%ADD10C,1.411988*%
%ADD11C,1.727200*%
D10*
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X359500Y170000D03*
X379500Y170000D03*
X359500Y150000D03*
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X199400Y271380D02*
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X224800Y286620D02*
X224800Y271380D01*
X250200Y271380D02*
X250200Y286620D01*
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X275600Y271380D01*
X199400Y236620D02*
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X224800Y236620D01*
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X250200Y221380D01*
X275600Y221380D02*
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X147600Y136120D01*
M02*

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G04 EAGLE Gerber RS-274X export*
G75*
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%FSLAX34Y34*%
%LPD*%
%INSoldermask Top*%
%IPPOS*%
%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*%
G01*
%ADD10C,1.411988*%
%ADD11C,1.727200*%
D10*
X359500Y250000D03*
X379500Y250000D03*
X359500Y230000D03*
X379500Y230000D03*
X359500Y210000D03*
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X250200Y271380D02*
X250200Y286620D01*
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X122200Y220880D01*
X147600Y220880D02*
X147600Y236120D01*
X71400Y186120D02*
X71400Y170880D01*
X96800Y170880D02*
X96800Y186120D01*
X122200Y186120D02*
X122200Y170880D01*
X147600Y170880D02*
X147600Y186120D01*
X71400Y136120D02*
X71400Y120880D01*
X96800Y120880D02*
X96800Y136120D01*
X122200Y136120D02*
X122200Y120880D01*
X147600Y120880D02*
X147600Y136120D01*
M02*

2548
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G04 EAGLE Gerber RS-274X export*
G75*
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%LPD*%
%INSolderpaste Top*%
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%AMOC8*
5,1,8,0,0,1.08239X$1,22.5*%
G01*
M02*