popufare/experiment/production/housing/v-amaranth/PopufareHousingInnerBackSupport.scad

// License: CC0
//
// To the extent possible under law, Clementine Computing LLC has waived
// all copyright and related or neighboring rights to this file.
//
// This work is published from: United States.
//

include <PopufareHousingCommon.scad>

// To be attached to the 'bottom' of the Raspberry Pi (3B+).
// This bracket is meant to provide zip tie access to tie down USB
// connections, zip tie access for the GPRS antennae and provide
// support for the SD card.
// Mounting this bracket flush with the bottom of the Raspberry Pi (3B+)
// should provide the lip of the material to prevent the SD card from
// dislodging.
//
module PopufareHousingInnerBackSupportPlate() {
  _lip_r = 24;
  _lip_l = 24;
  _w = RPI3BP_W + _lip_l + _lip_r;
  _h = RPI3BP_H + 10;
  _r = 3;
  
  _sd_w = 3.25;
  
  _rpi_lip = RPI3BP_W - RPI3BP_SCREW_DW - RPI3BP_SCREW_DE;
  
  // debug: pi board reference
  //translate([0,RPI3BP_H + 20]) square([RPI3BP_W, RPI3BP_H], center=true);
  //translate([RPI3BP_W + 30,0]) square([RPI3BP_W, RPI3BP_H], center=true);
  
  difference() {
    union() {
      difference() {
        //translate([_lip_l/2, 0]) rounded_rect(_w, _h, _r);
        translate([_w/2 - (_lip_l + RPI3BP_W/2), 0]) rounded_rect(_w, _h, _r);
        
        // sd card bracket
        //
        translate([-RPI3BP_W/2-_sd_w/2, 0])
         rounded_rect(_sd_w-2, RPI3BP_H, 1);
        
        // cut out middles sections to get rounded edges
        //
        translate([-RPI3BP_W/2+RPI3BP_SCREW_DW/2 + RPI3BP_SCREW_DE,0])
          rounded_rect(RPI3BP_SCREW_DW-2*RPI3BP_SCREW_DE, RPI3BP_H, 2);
        translate([RPI3BP_W/2 - _rpi_lip/2+2, 0])
          rounded_rect(_rpi_lip-3, RPI3BP_H, 2);
      
        // the above creates strips, use this to cut out the middle section
        // which we'll fill with rounded edges below
        //
        square([RPI3BP_W+0.5, RPI3BP_H - 2*RPI3BP_SCREW_DE], center=true);
      };
    
      // rounded tabs for mounting screws
      //
      translate([-RPI3BP_W/2+RPI3BP_SCREW_DE, (RPI3BP_H/2-RPI3BP_SCREW_DE)])
        circle(RPI3BP_SCREW_PAD_R);

      translate([-RPI3BP_W/2+RPI3BP_SCREW_DE,-(RPI3BP_H/2-RPI3BP_SCREW_DE)])
        circle(RPI3BP_SCREW_PAD_R);
      
      translate([-RPI3BP_W/2+RPI3BP_SCREW_DE+RPI3BP_SCREW_DW, (RPI3BP_H/2-RPI3BP_SCREW_DE)])
        circle(RPI3BP_SCREW_PAD_R);
      
      translate([-RPI3BP_W/2+RPI3BP_SCREW_DE+RPI3BP_SCREW_DW,-(RPI3BP_H/2-RPI3BP_SCREW_DE)])
        circle(RPI3BP_SCREW_PAD_R);

    }
    
    // rpi mounting screws
    //
    translate([-RPI3BP_W/2+RPI3BP_SCREW_DE, (RPI3BP_H/2-RPI3BP_SCREW_DE)])
      circle(RPI3BP_SCREW_R);
    
    translate([-RPI3BP_W/2+RPI3BP_SCREW_DE,-(RPI3BP_H/2-RPI3BP_SCREW_DE)])
      circle(RPI3BP_SCREW_R);
    
    translate([-RPI3BP_W/2+RPI3BP_SCREW_DE+RPI3BP_SCREW_DW, (RPI3BP_H/2-RPI3BP_SCREW_DE)])
      circle(RPI3BP_SCREW_R);
    
    translate([-RPI3BP_W/2+RPI3BP_SCREW_DE+RPI3BP_SCREW_DW,-(RPI3BP_H/2-RPI3BP_SCREW_DE)])
      circle(RPI3BP_SCREW_R);
    
    
    // usb zip tie slots
    //
    translate([RPI3BP_W/2 + _lip_r/2, -RPI3BP_H/2 + RPI3BP_USB0_H - RPI3BP_USB_DH/2])
      rounded_rect(_lip_r/2, 3, 1);
    translate([RPI3BP_W/2 + _lip_r/2, -RPI3BP_H/2 + RPI3BP_USB0_H + RPI3BP_USB_DH/2])
      rounded_rect(_lip_r/2, 3, 1);
    translate([RPI3BP_W/2 + _lip_r/2, -RPI3BP_H/2 + RPI3BP_USB1_H + RPI3BP_USB_DH/2])
      rounded_rect(_lip_r/2, 3, 1);
    
    // ethernet access
    //
    translate([RPI3BP_W/2 + _lip_r/2, -RPI3BP_H/2 + RPI3BP_ETH_H-3])
      rounded_rect(_lip_r/2, RPI3BP_ETH_DH-2, 2);
      
    // GPRS antennae access
    // 12 from center
    // 8 diameter
    // 14 center from edge
    //
    translate([-RPI3BP_W/2 - 14, 0])
      rounded_rect(9, 30, 4);
      
    // antennae zip tie access
    //
    translate([-RPI3BP_W/2 - 14,  24])
      rounded_rect(8, 4, 2);
    translate([-RPI3BP_W/2 - 14, -24])
      rounded_rect(8, 4, 2);
  }

}

//PopufareHousingInnerBackSupportPlate();