add stuff
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commit
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# cad
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Some CAD stuff I made for 3D printing etc
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## usbuart-case
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Case/shell for https://github.com/thequux/usb-uart , made in OpenSCAD.
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*.stl
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pcb_width = 33.5;
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pcb_length = 85.6;
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pcb_thickness = 1.6;
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thread_diameter = 2.6752404735808355; // Dp of coarse M3
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hole_diameter = 3.2;
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raise_diameter = 5.2;
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hole1_xoff = 4.254;
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hole1_yoff = 4.841;
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hole2_xoff = pcb_width - 4.191;
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hole2_yoff = hole1_yoff;
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hole3_xoff = hole1_xoff;
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hole3_yoff = pcb_length - 4.757;
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hole4_xoff = pcb_width - 4.274;
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hole4_yoff = hole3_yoff;
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outer_spacing = 1.5;
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outer_thickness = 1.5;
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groove_width = 1;
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groove_thickness = 1;
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case_height_total = 6;
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case_height_inner = case_height_total - outer_thickness;
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j1_xoff = 12.676;//12.696;
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j1_width = 8.128;
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j1_height = 3+pcb_thickness;
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sw1_yoff = 11.052;
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sw1_width = 12.7;
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sw1_height = 5+pcb_thickness;
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j3_yoff = sw1_yoff + sw1_width + 11.43;
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j3_width = 6.223;
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j3_height = 2.54+pcb_thickness;
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j8_xoff = 7.977;//9.140;
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j8_width = 16.383;
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j8_height = j3_height;
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j2_width = 16.29;
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j2_length = 9.9;
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j2_xoff = 8.116;
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j2_yoff = pcb_length - 11.536 - j2_length;
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j7_width = 6.15;
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j7_length = j7_width;
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j7_xoff = 13.192;
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j7_yoff = j2_yoff - 3.156 - j7_length;
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j456_width = 8.68;
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j456_length = 11.2;
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j456_xoff = 11.926;
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j456_yoff = j7_yoff - 1.236 - j456_length;
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// pcb
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%linear_extrude(pcb_thickness) square([pcb_width, pcb_length]);
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// case etc
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translate([0,0,0],$fn=40) difference() {
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union() {
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// outer shell
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difference() {
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minkowski() {
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translate([0,0,-groove_width])
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cube([pcb_width,pcb_length,case_height_inner+pcb_thickness+groove_width]);
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sphere(r=outer_thickness);
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}
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translate([0,0,-case_height_inner*0.1-groove_width])
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cube([pcb_width,pcb_length,case_height_inner*1.1+groove_width]);
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translate([-outer_thickness,-outer_thickness,-pcb_thickness*1.1-groove_width])
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cube([pcb_width+outer_thickness*2,pcb_length+outer_thickness*2,pcb_thickness*1.1]);
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// informative text
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translate([0,0,case_height_total+1.25]) {
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linear_extrude(1) union() {
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translate([j8_xoff+2.54,pcb_length-1.27]) rotate(90) union() {
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translate([0,-2.54*0])text("A",size=2,halign="right");
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translate([0,-2.54*1])text("GND",size=2,halign="right");
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translate([0,-2.54*2])text("TXD",size=2,halign="right");
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translate([0,-2.54*3])text("RXD",size=2,halign="right");
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translate([0,-2.54*4])text("B",size=2,halign="right");
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translate([0,-2.54*5])text("Vtgt",size=2,halign="right");
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}
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translate([j2_xoff,j2_yoff]) union() {
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translate([-1.27,2.54*0.5])text("A",size=2,halign="right");
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translate([-1.27,2.54*2.5])text("GND",size=2,halign="right");
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translate([j2_width/2,-2.54])text("↑TXD↑",size=2,halign="center");
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translate([j2_width/2,2.54*4])text("↓RXD↓",size=2,halign="center");
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translate([j2_width+1.27,2.54*0.5])text("B",size=2);
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translate([j2_width+1.27,2.54*2.5])text("Vtgt",size=2);
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}
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translate([j7_xoff-1.27*0.5,j7_yoff+1.27])
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text("swapped||",size=2,halign="right");
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translate([j7_xoff-1.27*0.5,j7_yoff+2.54+1.27])
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text("normal=",size=2,halign="right");
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translate([j456_xoff-2.54*3,j456_yoff+2.54*1.8])
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text("A",size=4,halign="right");
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translate([j456_xoff+j456_width+2.54*4.5,j456_yoff+2.54*1.8])
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text("B",size=4,halign="right");
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translate([j456_xoff-2.54*2.5,j456_yoff+1.27*0.5]) union() {
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translate([0,2.55*0])text("DSR",size=2);
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translate([0,2.55*1])text("CTS",size=2);
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translate([0,2.55*2])text("DTR",size=2);
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translate([-2.6,2.55*3])text("→RTS",size=2);
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}
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translate([j456_xoff+1.27+j456_width,j456_yoff+1.27*0.5]) union() {
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translate([0,2.55*0])text("DSR",size=2);
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translate([0,2.55*1])text("CTS←",size=2);
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translate([0,2.55*2])text("DTR",size=2);
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translate([0,2.55*3])text("RTS",size=2);
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}
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translate([pcb_width/2,j456_yoff-2.54*2.5]) union() {
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translate([0,-2.54*0])text("USB UART case",size=2,halign="center");
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translate([0,-2.54*1])text("© sys64738",size=2,halign="center");
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translate([0,-2.54*2])text("For CH340 UART",size=2,halign="center");
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translate([0,-2.54*3])text("PCB by TQ",size=2,halign="center");
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translate([0,-2.54*5])text("OSHW: git.lain.faith",size=2,halign="center");
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translate([0,-2.54*6])text("/sys64738/cad",size=2,halign="center");
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}
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translate([pcb_width/2,0]) text("USB",size=2,halign="center");
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translate([pcb_width,sw1_yoff+sw1_width-3.5]) union() {
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translate([0,-4*0])text("3V3",size=2,halign="right");
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translate([0,-4*1])text("Ext",size=2,halign="right");
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translate([0,-4*2])text("5V",size=2,halign="right");
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}
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translate([pcb_width,j3_yoff+j3_width-2.54]) union() {
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translate([0,-2.54*0])text("-",size=2,halign="right");
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translate([0,-2.54*1])text("+",size=2,halign="right");
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translate([-2.54,-2.54*1.4])rotate(90)text("Vext",size=2);
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}
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}
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}
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}
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// screw thingies
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translate([0,0,pcb_thickness]) difference() {
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// cylinders
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union() {
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// hole 1 bearing
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translate([hole1_xoff,hole1_yoff])
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cylinder(case_height_inner,d=raise_diameter);
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// hole 2 bearing
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translate([hole2_xoff,hole2_yoff])
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cylinder(case_height_inner,d=raise_diameter);
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// hole 3 bearing
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translate([hole3_xoff,hole3_yoff])
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cylinder(case_height_inner,d=raise_diameter);
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// hole 4 bearing
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translate([hole4_xoff,hole4_yoff])
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cylinder(case_height_inner,d=raise_diameter);
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}
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// thread holes
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translate([0,0,-0.1]) union() {
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translate([hole1_xoff,hole1_yoff])
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cylinder(case_height_inner+0.1,d=thread_diameter);
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// hole 2 bearing
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translate([hole2_xoff,hole2_yoff])
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cylinder(case_height_inner+0.1,d=thread_diameter);
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// hole 3 bearing
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translate([hole3_xoff,hole3_yoff])
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cylinder(case_height_inner+0.1,d=thread_diameter);
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// hole 4 bearing
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translate([hole4_xoff,hole4_yoff])
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cylinder(case_height_inner+0.1,d=thread_diameter);
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}
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}
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}
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// hole: J1
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translate([j1_xoff,-5,-0.1-groove_width])
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cube([j1_width, 10, j1_height+0.1+groove_width]);
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// hole: SW1
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translate([pcb_width-4,sw1_yoff,-0.1-groove_width])
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cube([8, sw1_width, sw1_height+0.1+groove_width]);
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// hole: J3
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translate([pcb_width-2.54,j3_yoff,-0.1-groove_width])
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cube([2.54*2, j3_width, j3_height+0.1+groove_width]);
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// hole: J8
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translate([j8_xoff,pcb_length-2.54,-0.1-groove_width])
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cube([j8_width, 2.54*2, j8_height+0.1+groove_width]);
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// hole: J2
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translate([j2_xoff,j2_yoff,case_height_total/2])
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cube([j2_width,j2_length,case_height_total]);
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// hole: J7
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translate([j7_xoff,j7_yoff,case_height_total/2])
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cube([j7_width,j7_length,case_height_total]);
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// hole: J4..6
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translate([j456_xoff,j456_yoff,case_height_total/2])
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cube([j456_width,j456_length,case_height_total]);
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}
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// bottom & pcb holder
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translate([0,0,-groove_thickness],$fn=40) difference() {
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union() {
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// pcb holder
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linear_extrude(groove_thickness) difference() {
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square([pcb_width, pcb_length]);
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translate([groove_width,groove_width])
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square([pcb_width-groove_width*2,pcb_length-groove_width*2]);
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}
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// hole 1 bearing
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translate([hole1_xoff,hole1_yoff]) cylinder(groove_thickness,d=raise_diameter);
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// hole 2 bearing
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translate([hole2_xoff,hole2_yoff]) cylinder(groove_thickness,d=raise_diameter);
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// hole 3 bearing
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translate([hole3_xoff,hole3_yoff]) cylinder(groove_thickness,d=raise_diameter);
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// hole 4 bearing
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translate([hole4_xoff,hole4_yoff]) cylinder(groove_thickness,d=raise_diameter);
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// bottom plane
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translate([0,0,-outer_thickness])
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linear_extrude(outer_thickness) {
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minkowski() {
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square([pcb_width,pcb_length]);
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circle(r=outer_spacing);
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}
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}
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}
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// holes for screws
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translate([0,0,-2]) union() {
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// hole 1 bearing
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translate([hole1_xoff,hole1_yoff]) cylinder(5,d=hole_diameter);
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translate([hole2_xoff,hole2_yoff]) cylinder(5,d=hole_diameter);
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translate([hole3_xoff,hole3_yoff]) cylinder(5,d=hole_diameter);
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translate([hole4_xoff,hole4_yoff]) cylinder(5,d=hole_diameter);
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}
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// space for screw heads
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translate([0,0,-outer_thickness-0.01]) union() {
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// hole 1 bearing
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translate([hole1_xoff,hole1_yoff])
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cylinder(outer_thickness*0.75,d=raise_diameter*1.25);
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translate([hole2_xoff,hole2_yoff])
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cylinder(outer_thickness*0.75,d=raise_diameter*1.25);
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translate([hole3_xoff,hole3_yoff])
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cylinder(outer_thickness*0.75,d=raise_diameter*1.25);
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translate([hole4_xoff,hole4_yoff])
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cylinder(outer_thickness*0.75,d=raise_diameter*1.25);
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}
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}
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