Added a second example project.

examples/EnviroPlus/bom/RPI_assembly.txt

@@ -0,0 +1,5 @@
+RPI_assembly:
+Vitamins:
+  1 Micro SD card
+  1 Raspberry Pi Zero
+  1 Pin header 20 x 2 right_angle

examples/EnviroPlus/bom/RPI_case_assembly.txt

@@ -0,0 +1,7 @@
+RPI_case_assembly:
+Vitamins:
+  2 Screw M2.5 pan x  6.4mm
+
+Assemblies:
+  1 RPI_assembly
+  1 enviro_case_assembly

examples/EnviroPlus/bom/back_assembly.txt

@@ -0,0 +1,8 @@
+back_assembly:
+Vitamins:
+  1 Fan 17mm x 8mm
+  1 PMS5003 particle detector
+
+Printed:
+  1 enviro_plus_case_base.stl
+  1 fan_duct.stl

examples/EnviroPlus/bom/bom.csv

@@ -0,0 +1,21 @@
+'Micro SD card',  1
+'Fan 17mm x 8mm',  1
+'Heatfit insert M2',  4
+'Nut M2.5 x 2.2mm nyloc',  4
+'Enviro+',  1
+'Raspberry Pi Zero',  1
+'Pin header 20 x 2 right_angle',  1
+'PMS5003 particle detector',  1
+'Screw M2 cap x  6mm',  4
+'Screw M2.5 pan x  6.4mm',  2
+'Screw M2.5 pan x  8mm',  4
+'Screw M3 pan x  6mm',  3
+'SMD capacitor 1206 10uF',  1
+'SMD resistor 0805 3K3 0.125W',  1
+'SOT223 package FZT851',  1
+'Veroboard 6 holes x 6strips',  1
+'Washer  M2 x 5mm x 0.3mm',  4
+'Washer  M2.5 x 5.9mm x 0.5mm',  4
+'Washer  M3 x 7mm x 0.5mm',  3
+'Wire link 0.8mm x 6.5mm',  3
+'Wire link 0.8mm x 0.4"',  1

examples/EnviroPlus/bom/bom.json

@@ -0,0 +1,194 @@
+[
+    {
+        "name": "back_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {},
+        "vitamins": {
+            "pms5003(): PMS5003 particle detector": {
+                "count": 1
+            },
+            "fan(fan17x8): Fan 17mm x 8mm": {
+                "count": 1
+            }
+        },
+        "printed": {
+            "fan_duct.stl": {
+                "count": 1,
+                "colour": "darkorange"
+            },
+            "enviro_plus_case_base.stl": {
+                "count": 1,
+                "colour": "grey"
+            }
+        },
+        "routed": {}
+    },
+    {
+        "name": "RPI_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {},
+        "vitamins": {
+            "pcb(RPI0): Raspberry Pi Zero": {
+                "count": 1
+            },
+            ": Micro SD card": {
+                "count": 1
+            },
+            "pin_header(2p54header, 20, 2, right_angle = true): Pin header 20 x 2 right_angle": {
+                "count": 1
+            }
+        },
+        "printed": {},
+        "routed": {}
+    },
+    {
+        "name": "fan_controller_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {},
+        "vitamins": {
+            "veroboard(fan_vb): Veroboard 6 holes x 6strips": {
+                "count": 1
+            },
+            "wire_link(0.8, 10.16, tail = 2.5): Wire link 0.8mm x 0.4\"": {
+                "count": 1
+            },
+            "wire_link(0.8, 0, h = 4, tail = 2.5): Wire link 0.8mm x 6.5mm": {
+                "count": 3
+            },
+            "smd_resistor(RES0805, 3K3): SMD resistor 0805 3K3 0.125W": {
+                "count": 1
+            },
+            "smd_capacitor(CAP1206): SMD capacitor 1206 10uF": {
+                "count": 1
+            },
+            "smd_sot(SOT223): SOT223 package FZT851": {
+                "count": 1
+            }
+        },
+        "printed": {},
+        "routed": {}
+    },
+    {
+        "name": "enviro_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {
+            "fan_controller_assembly": 1
+        },
+        "vitamins": {
+            "pcb(EnviroPlus): Enviro+": {
+                "count": 1
+            }
+        },
+        "printed": {},
+        "routed": {}
+    },
+    {
+        "name": "case_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {},
+        "vitamins": {
+            "insert(F1BM2): Heatfit insert M2": {
+                "count": 4
+            },
+            "washer(M3_washer): Washer  M3 x 7mm x 0.5mm": {
+                "count": 3
+            },
+            "screw(M3_pan_screw, 6): Screw M3 pan x  6mm": {
+                "count": 3
+            }
+        },
+        "printed": {
+            "enviro_plus_case.stl": {
+                "count": 1,
+                "colour": "grey"
+            },
+            "bulkhead.stl": {
+                "count": 1,
+                "colour": "[0.862745, 0.0784314, 0.235294]"
+            },
+            "foot.stl": {
+                "count": 3,
+                "colour": "darkorange"
+            }
+        },
+        "routed": {}
+    },
+    {
+        "name": "enviro_case_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {
+            "case_assembly": 1,
+            "enviro_assembly": 1
+        },
+        "vitamins": {
+            "screw(M2p5_pan_screw, 8): Screw M2.5 pan x  8mm": {
+                "count": 4
+            },
+            "washer(M2p5_washer): Washer  M2.5 x 5.9mm x 0.5mm": {
+                "count": 4
+            },
+            "nut(M2p5_nut, nyloc = true): Nut M2.5 x 2.2mm nyloc": {
+                "count": 4
+            }
+        },
+        "printed": {},
+        "routed": {}
+    },
+    {
+        "name": "RPI_case_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {
+            "enviro_case_assembly": 1,
+            "RPI_assembly": 1
+        },
+        "vitamins": {
+            "screw(M2p5_pan_screw, 6.4): Screw M2.5 pan x  6.4mm": {
+                "count": 2
+            }
+        },
+        "printed": {},
+        "routed": {}
+    },
+    {
+        "name": "main_assembly",
+        "big": null,
+        "ngb": false,
+        "zoomed": 0,
+        "count": 1,
+        "assemblies": {
+            "RPI_case_assembly": 1,
+            "back_assembly": 1
+        },
+        "vitamins": {
+            "washer(M2_washer): Washer  M2 x 5mm x 0.3mm": {
+                "count": 4
+            },
+            "screw(M2_cap_screw, 6): Screw M2 cap x  6mm": {
+                "count": 4
+            }
+        },
+        "printed": {},
+        "routed": {}
+    }
+]

examples/EnviroPlus/bom/bom.txt

@@ -0,0 +1,53 @@
+Vitamins:
+                   F   
+                   a   
+                   n   
+                E      
+                n  c   
+                v  o   
+    R           i  n   
+    p           r  t   
+    i        E  o  r   
+             n     o   
+    c  B  C  v  c  l  M
+ R  a  a  a  i  a  l  a
+ p  s  c  s  r  s  e  i
+ i  e  k  e  o  e  r  n
+ 1|  |  |  |  |  |  |  |  1 Micro SD card
+  |  | 1|  |  |  |  |  |  1 Fan 17mm x 8mm
+  |  |  | 4|  |  |  |  |  4 Heatfit insert M2
+  |  |  |  |  | 4|  |  |  4 Nut M2.5 x 2.2mm nyloc
+  |  |  |  | 1|  |  |  |  1 Enviro+
+ 1|  |  |  |  |  |  |  |  1 Raspberry Pi Zero
+ 1|  |  |  |  |  |  |  |  1 Pin header 20 x 2 right_angle
+  |  | 1|  |  |  |  |  |  1 PMS5003 particle detector
+  |  |  |  |  |  |  | 4|  4 Screw M2 cap x  6mm
+  | 2|  |  |  |  |  |  |  2 Screw M2.5 pan x  6.4mm
+  |  |  |  |  | 4|  |  |  4 Screw M2.5 pan x  8mm
+  |  |  | 3|  |  |  |  |  3 Screw M3 pan x  6mm
+  |  |  |  |  |  | 1|  |  1 SMD capacitor 1206 10uF
+  |  |  |  |  |  | 1|  |  1 SMD resistor 0805 3K3 0.125W
+  |  |  |  |  |  | 1|  |  1 SOT223 package FZT851
+  |  |  |  |  |  | 1|  |  1 Veroboard 6 holes x 6strips
+  |  |  |  |  |  |  | 4|  4 Washer  M2 x 5mm x 0.3mm
+  |  |  |  |  | 4|  |  |  4 Washer  M2.5 x 5.9mm x 0.5mm
+  |  |  | 3|  |  |  |  |  3 Washer  M3 x 7mm x 0.5mm
+  |  |  |  |  |  | 3|  |  3 Wire link 0.8mm x 6.5mm
+  |  |  |  |  |  | 1|  |  1 Wire link 0.8mm x 0.4"
+
+Printed:
+  |  |  | 1|  |  |  |  |  1 bulkhead.stl
+  |  |  | 1|  |  |  |  |  1 enviro_plus_case.stl
+  |  | 1|  |  |  |  |  |  1 enviro_plus_case_base.stl
+  |  | 1|  |  |  |  |  |  1 fan_duct.stl
+  |  |  | 3|  |  |  |  |  3 foot.stl
+
+Assemblies:
+  1 RPI_assembly
+  1 RPI_case_assembly
+  1 back_assembly
+  1 case_assembly
+  1 enviro_assembly
+  1 enviro_case_assembly
+  1 fan_controller_assembly
+  1 main_assembly

examples/EnviroPlus/bom/case_assembly.txt

@@ -0,0 +1,10 @@
+case_assembly:
+Vitamins:
+  4 Heatfit insert M2
+  3 Screw M3 pan x  6mm
+  3 Washer  M3 x 7mm x 0.5mm
+
+Printed:
+  1 bulkhead.stl
+  1 enviro_plus_case.stl
+  3 foot.stl

examples/EnviroPlus/bom/enviro_assembly.txt

@@ -0,0 +1,6 @@
+enviro_assembly:
+Vitamins:
+  1 Enviro+
+
+Assemblies:
+  1 fan_controller_assembly

examples/EnviroPlus/bom/enviro_case_assembly.txt

@@ -0,0 +1,9 @@
+enviro_case_assembly:
+Vitamins:
+  4 Nut M2.5 x 2.2mm nyloc
+  4 Screw M2.5 pan x  8mm
+  4 Washer  M2.5 x 5.9mm x 0.5mm
+
+Assemblies:
+  1 case_assembly
+  1 enviro_assembly

examples/EnviroPlus/bom/fan_controller_assembly.txt

@@ -0,0 +1,8 @@
+fan_controller_assembly:
+Vitamins:
+  1 SMD capacitor 1206 10uF
+  1 SMD resistor 0805 3K3 0.125W
+  1 SOT223 package FZT851
+  1 Veroboard 6 holes x 6strips
+  3 Wire link 0.8mm x 6.5mm
+  1 Wire link 0.8mm x 0.4"

examples/EnviroPlus/bom/main_assembly.txt

@@ -0,0 +1,8 @@
+main_assembly:
+Vitamins:
+  4 Screw M2 cap x  6mm
+  4 Washer  M2 x 5mm x 0.3mm
+
+Assemblies:
+  1 RPI_case_assembly
+  1 back_assembly

examples/EnviroPlus/readme.md

@@ -0,0 +1,298 @@
+<a name="TOP"></a>
+# EnviroPlus
+Environmental monitor using Enviro+ sensor board and a Raspberry Pi Zero.
+
+![Main Assembly](assemblies/main_assembled.png)
+
+<span></span>
+
+---
+## Table of Contents
+1. [Parts list](#Parts_list)
+1. [Back Assembly](#back_assembly)
+1. [RPI Assembly](#RPI_assembly)
+1. [Fan Controller Assembly](#fan_controller_assembly)
+1. [Enviro Assembly](#enviro_assembly)
+1. [Case Assembly](#case_assembly)
+1. [Enviro Case Assembly](#enviro_case_assembly)
+1. [RPI Case Assembly](#RPI_case_assembly)
+1. [Main Assembly](#main_assembly)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="Parts_list"></a>
+## Parts list
+| <span style="writing-mode: vertical-rl; text-orientation: mixed;">Back</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">RPI</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">Fan&nbsp;Controller</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">Enviro</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">Case</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">Enviro&nbsp;Case</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">RPI&nbsp;Case</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">Main</span> | <span style="writing-mode: vertical-rl; text-orientation: mixed;">TOTALS</span> |  |
+|---:|---:|---:|---:|---:|---:|---:|---:|---:|:---|
+|  |  |  |  |  |  |  |  | | **Vitamins** |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Enviro+ |
+| &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Fan 17mm x 8mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Heatfit insert M2 |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Micro SD card |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Nut M2.5 x 2.2mm nyloc |
+| &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; PMS5003 particle detector |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Pin header 20 x 2 right_angle |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Raspberry Pi Zero |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; SMD capacitor 1206 10uF |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; SMD resistor 0805 3K3 0.125W |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; SOT223 package FZT851 |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Screw M2 cap x  6mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;2&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;2&nbsp; | &nbsp;&nbsp; Screw M2.5 pan x  6.4mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Screw M2.5 pan x  8mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp; Screw M3 pan x  6mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Veroboard 6 holes x 6strips |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Washer  M2 x 5mm x 0.3mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;4&nbsp; | &nbsp;&nbsp; Washer  M2.5 x 5.9mm x 0.5mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp; Washer  M3 x 7mm x 0.5mm |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp; Wire link 0.8mm x 0.4" |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp; Wire link 0.8mm x 6.5mm |
+| &nbsp;&nbsp;2&nbsp; | &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;8&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;10&nbsp; | &nbsp;&nbsp;12&nbsp; | &nbsp;&nbsp;2&nbsp; | &nbsp;&nbsp;8&nbsp; | &nbsp;&nbsp;46&nbsp; | &nbsp;&nbsp;Total vitamins count |
+|  |  |  |  |  |  |  |  | | **3D printed parts** |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;bulkhead.stl |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;enviro_plus_case.stl |
+| &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;enviro_plus_case_base.stl |
+| &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;1&nbsp; | &nbsp;&nbsp;fan_duct.stl |
+| &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; |  &nbsp;&nbsp;3&nbsp; | &nbsp;&nbsp;foot.stl |
+| &nbsp;&nbsp;2&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;5&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;.&nbsp; | &nbsp;&nbsp;7&nbsp; | &nbsp;&nbsp;Total 3D printed parts count |
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="back_assembly"></a>
+## Back Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|1| Fan 17mm x 8mm|
+|1| PMS5003 particle detector|
+
+
+### 3D Printed parts
+
+| 1 x enviro_plus_case_base.stl | 1 x fan_duct.stl |
+|---|---|
+| ![enviro_plus_case_base.stl](stls/enviro_plus_case_base.png) | ![fan_duct.stl](stls/fan_duct.png) 
+
+
+
+### Assembly instructions
+![back_assembly](assemblies/back_assembly.png)
+
+1. Print the fan duct in flexible TPE with low infill.
+1. Slide the pms5003 into the printed receptacle with the fan to the outside. Secure with tape if it is loose.
+1. Slide the fan into the fan duct.
+1. Slide the fan duct into the printed recepacle.
+
+![back_assembled](assemblies/back_assembled.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="RPI_assembly"></a>
+## RPI Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|1| Micro SD card|
+|1| Pin header 20 x 2 right_angle|
+|1| Raspberry Pi Zero|
+
+
+### Assembly instructions
+![RPI_assembly](assemblies/RPI_assembly_tn.png)
+
+* Solder a right angle connector to the Raspberry Pi Zero.
+
+![RPI_assembled](assemblies/RPI_assembled_tn.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="fan_controller_assembly"></a>
+## Fan Controller Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|1| SMD capacitor 1206 10uF|
+|1| SMD resistor 0805 3K3 0.125W|
+|1| SOT223 package FZT851|
+|1| Veroboard 6 holes x 6strips|
+|1| Wire link 0.8mm x 0.4"|
+|3| Wire link 0.8mm x 6.5mm|
+
+
+### Assembly instructions
+![fan_controller_assembly](assemblies/fan_controller_assembly_tn.png)
+
+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.
+
+![Schematic](docs/fan_controller.jpg)
+
+***
+* Make two track cuts as shown, one wide and the other narrow.
+
+![TrackCuts](docs/cuts.jpg)
+
+1. Add the SMT compeonents and then the wire links.
+1. Add more solder around the transistor to act as a heatsink.
+
+![SMT](docs/smt.jpg)
+
+
+![fan_controller_assembled](assemblies/fan_controller_assembled_tn.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="enviro_assembly"></a>
+## Enviro Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|1| Enviro+|
+
+
+### Sub-assemblies
+
+| 1 x fan_controller_assembly |
+|---|
+| ![fan_controller_assembled](assemblies/fan_controller_assembled_tn.png) 
+
+
+
+### Assembly instructions
+![enviro_assembly](assemblies/enviro_assembly_tn.png)
+
+* Solder the fan_controller to the Enviro+ expansion connector at the 5V, GND and #4 pins.
+
+![enviro_assembled](assemblies/enviro_assembled_tn.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="case_assembly"></a>
+## Case Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|4| Heatfit insert M2|
+|3| Screw M3 pan x  6mm|
+|3| Washer  M3 x 7mm x 0.5mm|
+
+
+### 3D Printed parts
+
+| 1 x bulkhead.stl | 1 x enviro_plus_case.stl | 3 x foot.stl |
+|---|---|---|
+| ![bulkhead.stl](stls/bulkhead.png) | ![enviro_plus_case.stl](stls/enviro_plus_case.png) | ![foot.stl](stls/foot.png) 
+
+
+
+### Assembly instructions
+![case_assembly](assemblies/case_assembly.png)
+
+1. Solvent weld or glue the bulkhead into the recess in the bottom of the case.
+1. Fit the heatfit inserts with a soldering iron with a conical bit heated to about 200&deg;C.
+1. Tap the three holes for the feet with an M3 tap.
+1. Screw on the three feet with M3 x 6mm pan screws and washers.
+
+![case_assembled](assemblies/case_assembled.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="enviro_case_assembly"></a>
+## Enviro Case Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|4| Nut M2.5 x 2.2mm nyloc|
+|4| Screw M2.5 pan x  8mm|
+|4| Washer  M2.5 x 5.9mm x 0.5mm|
+
+
+### Sub-assemblies
+
+| 1 x case_assembly | 1 x enviro_assembly |
+|---|---|
+| ![case_assembled](assemblies/case_assembled_tn.png) | ![enviro_assembled](assemblies/enviro_assembled_tn.png) 
+
+
+
+### Assembly instructions
+![enviro_case_assembly](assemblies/enviro_case_assembly.png)
+
+* Screw the Enviro+ PCB to the front of the case using M2.5 x 8mm pan screws with washer and nuts on the inside.
+
+![enviro_case_assembled](assemblies/enviro_case_assembled.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="RPI_case_assembly"></a>
+## RPI Case Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|2| Screw M2.5 pan x  6.4mm|
+
+
+### Sub-assemblies
+
+| 1 x RPI_assembly | 1 x enviro_case_assembly |
+|---|---|
+| ![RPI_assembled](assemblies/RPI_assembled_tn.png) | ![enviro_case_assembled](assemblies/enviro_case_assembled_tn.png) 
+
+
+
+### Assembly instructions
+![RPI_case_assembly](assemblies/RPI_case_assembly.png)
+
+* Plug the RPi into the Enviro+ socket and secure with two screws self tapped into the bosses in the case.
+
+![RPI_case_assembled](assemblies/RPI_case_assembled.png)
+
+<span></span>
+[Top](#TOP)
+
+---
+<a name="main_assembly"></a>
+## Main Assembly
+### Vitamins
+|Qty|Description|
+|---:|:----------|
+|4| Screw M2 cap x  6mm|
+|4| Washer  M2 x 5mm x 0.3mm|
+
+
+### Sub-assemblies
+
+| 1 x RPI_case_assembly | 1 x back_assembly |
+|---|---|
+| ![RPI_case_assembled](assemblies/RPI_case_assembled_tn.png) | ![back_assembled](assemblies/back_assembled_tn.png) 
+
+
+
+### Assembly instructions
+![main_assembly](assemblies/main_assembly.png)
+
+* Solder the fan wires to the veroboard assembly
+
+![FanWires](docs/fan_connection.jpg)
+
+* Slide the back assembly into the case and secure with four M2 x 6mm cap screws and washers.
+
+![main_assembled](assemblies/main_assembled.png)
+
+<span></span>
+[Top](#TOP)

examples/EnviroPlus/scad/fan_controller.scad

@@ -0,0 +1,45 @@
+//
+//! 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.
+//!
+//! ![Schematic](docs/fan_controller.jpg)
+//!
+//! ***
+//! * Make two track cuts as shown, one wide and the other narrow.
+//!
+//! ![TrackCuts](docs/cuts.jpg)
+//!
+//! 1. Add the SMT compeonents and then the wire links.
+//! 1. Add more solder around the transistor to act as a heatsink.
+//!
+//! ![SMT](docs/smt.jpg)
+//!
+module fan_controller_assembly() rotate(90) vflip(!exploded()) veroboard_assembly(fan_vb, -vero_thickness(fan_vb) - 1.4, 0);
+
+fan_controller_assembly();

examples/EnviroPlus/scad/main.scad

@@ -0,0 +1,518 @@
+//
+//! Environmental monitor using Enviro+ sensor board and a Raspberry Pi Zero.
+//
+// GNU GPL v2
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// Top level model
+//
+$explode = 0; // [0, 1]
+assembly = "main"; // [main, back, RPI, case, enviro_case, RPI_case]
+
+/* [Hidden] */
+
+show_box = true;
+show_enviroplus = true;
+$pp1_colour = "grey";
+$extrusion_width = 0.5;
+
+include <NopSCADlib/core.scad>
+include <NopSCADlib/vitamins/pin_headers.scad>
+include <NopSCADlib/vitamins/pcbs.scad>
+include <NopSCADlib/vitamins/fans.scad>
+
+use <NopSCADlib/vitamins/insert.scad>
+use <NopSCADlib/vitamins/veroboard.scad>
+use <NopSCADlib/utils/round.scad>
+use <NopSCADlib/printed/foot.scad>
+use <NopSCADlib/printed/printed_box.scad>
+use <fan_controller.scad>
+
+rpi = RPI0;
+pcb = EnviroPlus;
+fan = fan17x8;
+foot = Foot(d = 13, h = 5, t = 2, r = 1, screw = M3_pan_screw);
+module foot_stl() foot(foot);
+
+rpi_offset = [0, -pcb_width(pcb) / 2 + 0.5, pcb_width(rpi) / 2 + 8.6];
+rpi_holes = [0, 1];
+wall = 2;
+top_thickness = 2;
+base_thickness = 2;
+case_inner_rad = 8;
+
+width = pcb_length(pcb) + 9 + 10;
+pcb_x = -(width - pcb_length(pcb) - 9) / 2;
+depth = pcb_width(pcb) + 9;
+height = pcb_width(rpi) / 2 + rpi_offset.z + 9;
+bulkhead_outset = 2;
+bulkhead_inset = 0.5;
+bulkhead_t = 2;
+clearance = 0.1;
+pcb_screw = alternate_screw(hs_pan, pcb_screw(pcb));
+
+box = pbox(name = "enviro_plus_case", wall = wall, top_t = top_thickness, base_t = base_thickness, screw = M2_cap_screw, radius = case_inner_rad, ridges = [8, 1],
+    size = [width,  depth, height]);
+
+pms5003 = [50, 38, 21];
+pms5003_wall = 1;
+pms5003_pos = [width / 2 - pms5003.x / 2 - pms5003_wall - pbox_screw_inset(box) - insert_boss_radius(screw_insert(pbox_screw(box)), wall) - 0.5,
+               depth / 2 - pms5003.z / 2 - wall - 1,
+               height + top_thickness - pms5003.y / 2];
+
+
+fan_duct_t = 1.7;
+foam_t = 0;
+fan_pos = [pms5003_pos.x - pms5003.x / 2 - pms5003_wall - fan_width(fan) / 2 - fan_duct_t, 1 + foam_t, 12 + top_thickness + fan_depth(fan) / 2];
+fan_socket = 8;
+
+module fan_shape() {
+    w = fan_width(fan);
+    p = fan_hole_pitch(fan);
+    r = w / 2 - p;
+
+    rounded_square([w, w], r);
+}
+
+module fan_duct_stl() {
+    module frame(z, offset, y = -fan_pos.y)
+        translate([0, y, z])
+            linear_extrude(height = eps)
+                offset(offset)
+                    fan_shape();
+
+    z = height + top_thickness - fan_pos.z + fan_depth(fan) / 2 - fan_socket;
+
+    translate([0, -fan_pos.y, z])
+        linear_extrude(height = fan_socket)
+            difference() {
+                fan_shape();
+
+                round(1)
+                    offset(-fan_duct_t)
+                        fan_shape();
+            }
+
+    stl("fan_duct") union() {
+        difference() {
+            hull() {
+                frame(z, 0);
+
+                frame(fan_depth(fan), fan_duct_t + foam_t, 0);
+            }
+            hull() {
+                frame(z, -fan_duct_t);
+
+                frame(fan_depth(fan), foam_t -extrusion_width / 2, 0);
+            }
+        }
+
+        linear_extrude(height = fan_depth(fan))
+            difference() {
+                offset(fan_duct_t + foam_t)
+                    fan_shape();
+
+                offset(foam_t)
+                    fan_shape();
+            }
+    }
+}
+
+module pms5003() {
+    vitamin("pms5003(): PMS5003 particle detector");
+
+    w = pms5003.x;
+    d = pms5003.y;
+    h = pms5003.z;
+    t = 0.1;
+    color("silver")
+        difference() {
+            linear_extrude(height = h, center = true)
+                difference() {
+                    square([w, d], center = true);
+
+                    for(x = [-1, 1], y = [-1, 1])
+                        translate([x * w / 2, y * d / 2])
+                            square(2, center = true);
+                }
+            cube([w + 2 * eps, d + 2 * eps, t * 2], center = true);
+         }
+
+    color("black")
+        rounded_rectangle([w - 2 * t, d - 2 * t, h - 2 * t], r = 1, center = true);
+}
+
+module pcb_shape(offset)
+    rounded_square([pcb_length(pcb) + 2 * offset, pcb_width(pcb) + 2 * offset], pcb_radius(pcb) + offset);
+
+module gap() {
+    gap = pcb_component_position(pcb, "-chip");
+
+    translate([gap.x, -gap.y])
+        square([17.5, 20], center = true);
+}
+
+module rpi_holes()
+    for(i = rpi_holes) {
+        hole = pcb_coord(rpi, pcb_holes(rpi)[i]);
+        translate([hole.x, rpi_offset.y, -hole.y + rpi_offset.z + top_thickness])
+            rotate([90, 0, 0])
+                children();
+    }
+
+module feet_positions() {
+    clearance = 2;
+    foot_r = foot_diameter(foot) / 2;
+    x_inset = case_inner_rad + foot_r - pbox_ridges(box).y;
+    z_inset = foot_r + clearance;
+    h = height + base_thickness;
+
+    for(p = [[-1, -1], [1, -1], [0, 1]])
+        translate([p.x * (width / 2 - x_inset), depth / 2 + wall + pbox_ridges(box).y, top_thickness + h / 2 + p.y * (h / 2 - z_inset)])
+            rotate([90, 0, 0])
+                children();
+}
+
+module slots(h = 10, expand = 0) {
+    for(comp = [["uSD", 2, 11, 0.7], ["flat_flex", 1, 12, 0.5]]) {
+        p = pcb_component_position(rpi, comp[0]);
+        translate([sign(p.x) * (width / 2 + wall / 2 + pbox_ridges(box).y / 2), rpi_offset.y + pcb_thickness(rpi) + comp[3], top_thickness + rpi_offset.z - p.y])
+            rotate([90, 0, 90])
+                hull() {
+                    vertical_tearslot(r = comp[1] + expand, l = comp[2], h = h);
+
+                    if(expand)
+                         vertical_tearslot(r = comp[1] + expand + h / 2, l = comp[2], h = eps);
+                }
+     }
+}
+
+module box_internal_additions() {
+    translate([pcb_x, 0]) {
+        linear_extrude(height = top_thickness + bulkhead_t)
+            difference() {
+                pcb_shape(bulkhead_outset + wall + pbox_ridges(box).y + eps);
+
+                gap();
+
+                pcb_shape(bulkhead_outset + clearance);
+            }
+
+        rpi_holes()
+            hull() {
+                wall = 1.8;
+                r =  screw_radius(pcb_screw) + wall;
+                z = depth / 2 + rpi_offset.y + pbox_ridges(box).y + eps;
+                offset = max(r, z);
+                cylinder(r =r, h = z);
+
+                translate([0, -offset - r, z])
+                    cube(eps);
+            }
+    }
+    d = washer_diameter(screw_washer(foot_screw(foot))) + 1;
+    h = pbox_ridges(box).y;
+    feet_positions()
+        translate_z(wall - eps)
+            cylinder(d2 = d, d1 = d + 2 * h, h = h);
+
+    slots(wall + pbox_ridges(box).y + eps, 1);
+}
+
+module box_external_additions() {
+    amp = pbox_ridges(box).y + eps;
+    d = foot_diameter(foot) + 1;
+    feet_positions()
+        cylinder(d1 = d, d2 = d + 2 * amp, h = amp);
+
+    slots(wall + pbox_ridges(box).y + eps, 1);
+}
+
+
+module box_holes() {
+    translate([pcb_x, 0]) {
+        linear_extrude(height = top_thickness + eps)
+            pcb_shape(clearance);
+
+        rpi_holes()
+            teardrop_plus(r = screw_pilot_hole(pcb_screw), h = 7 - 1.6, center = false);
+    }
+    feet_positions()
+        teardrop(r = screw_pilot_hole(foot_screw(foot)), h = 10, center = true);
+
+    grills = 7;
+    bar = 1.6;
+    x = pcb_x + pcb_length(pcb) / 2 + 2 * wall +  pbox_ridges(box).y + 2 * eps;
+    w = width / 2 - x;
+    d = depth - case_inner_rad;
+    pitch = d / (grills - 1);
+    for(i = [0 : grills -1])
+        let(w = i == 0 || i == grills -1 ? w - 1 : w)
+            translate([x + w / 2, -d / 2 + i * pitch])
+                rounded_rectangle([w, pitch - bar, 10], 1);
+
+    slots();
+}
+
+module bulkhead_stl() {
+    holes = pcb_holes(pcb);
+    pitch = max([for(h = holes) pcb_coord(pcb, h).x]) - min([for(h = holes)  pcb_coord(pcb, h).x]);
+    boss_r = (pitch - 51.4) / 2;
+
+    stl("bulkhead")
+        linear_extrude(height = bulkhead_t)
+            difference() {
+                pcb_shape(bulkhead_outset);
+
+                gap();
+
+                difference() {
+                    pcb_shape(-bulkhead_inset);
+
+                    pcb_screw_positions(pcb)
+                        rotate($i * 90)
+                            hull() {
+                                circle(boss_r);
+
+                                translate([boss_r - eps, -boss_r])
+                                    square([eps, boss_r]);
+
+                                translate([-boss_r, boss_r - eps])
+                                    square([boss_r, eps]);
+
+                                translate([-boss_r, -boss_r])
+                                    square(eps);
+                            }
+                }
+
+                pcb_screw_positions(pcb)
+                    poly_circle(screw_clearance_radius(pcb_screw));
+            }
+}
+
+module enviro_plus_case_stl() {
+     pbox(box) {
+        box_internal_additions();
+        box_holes();
+        box_external_additions();
+     }
+}
+
+module base_additions() {
+    w = pms5003.x + clearance;
+    d = pms5003.z + clearance;
+    wall = pms5003_wall;
+
+    translate([pms5003_pos.x, -pms5003_pos.y])
+        linear_extrude(height = base_thickness + pms5003.y)
+            difference() {
+                square([w + 2 * wall, d + 2 * wall], center = true);
+                square([w, d], center = true);
+            }
+
+    translate([fan_pos.x, 0])
+        linear_extrude(height = top_thickness + fan_socket)
+            difference() {
+                offset(wall)
+                    fan_shape();
+
+                fan_shape();
+            }
+}
+
+module base_holes() {
+    for(i = [0 : 1]) {
+        p = pcb_component_position(rpi, "usb_uA", i);
+        translate([p.x + pcb_x, -rpi_offset.y - pcb_thickness(rpi) - 1.3])
+            rounded_rectangle([11,7, 100], 0.5, true);
+    }
+
+    translate([pms5003_pos.x, -pms5003_pos.y])
+        rounded_rectangle([pms5003.x - 2 ,pms5003.z - 2, 100], 2, true);
+
+    translate([fan_pos.x, 0])
+        linear_extrude(height = 2 * base_thickness + eps, center = true)
+            round(1)
+                offset(-fan_duct_t)
+                    fan_shape();
+}
+
+module enviro_plus_case_base_stl()
+    pbox_base(box) {
+        base_additions();
+        base_holes();
+    }
+
+//! * Solder a right angle connector to the Raspberry Pi Zero.
+module RPI_assembly()
+assembly("RPI") {
+    pcb(rpi);
+
+    pcb_grid(rpi, 9.5, 0.5, -0.6)
+        rotate(180)
+            explode(20)
+                pin_header(2p54header, 20, 2, right_angle = true);
+}
+
+//! 1. Solvent weld or glue the bulkhead into the recess in the bottom of the case.
+//! 1. Fit the heatfit inserts with a soldering iron with a conical bit heated to about 200&deg;C.
+//! 1. Tap the three holes for the feet with an M3 tap.
+//! 1. Screw on the three feet with M3 x 6mm pan screws and washers.
+module case_assembly() pose([ 29.60, 0.00, 158.00 ], exploded = true) pose([ 198.00, 0.00, 352.80 ], exploded = false)
+assembly("case") {
+    if(show_box)
+        stl_colour(pp1_colour) render() enviro_plus_case_stl();
+    else
+        render() difference() {
+            enviro_plus_case_stl();
+
+            translate_z(height / 2)
+                cube([100, 100, height - 20], center = true);
+        }
+
+    pbox_inserts(box);
+
+    translate([pcb_x, 0, top_thickness])
+        explode(20)
+            stl_colour(pp2_colour) render() bulkhead_stl();
+
+    feet_positions() {
+        foot_assembly(0, foot);
+
+        vflip()
+            explode(20, explode_children = true)
+                translate_z(foot_thickness(foot))
+                    screw_and_washer(foot_screw(foot), 6);
+    }
+
+}
+
+//! * Solder the fan_controller to the Enviro+ expansion connector at the 5V, GND and #4 pins.
+module enviro_assembly() hflip(exploded())
+assembly("enviro") {
+    if(show_enviroplus)
+        pcb(pcb);
+
+    pcb_grid(pcb, 5.5, 2.5, -pcb_thickness(pcb)) {
+        hflip()
+            explode(15)
+                fan_controller_assembly();
+    }
+    if(!exploded())
+        for(x = [8, 7, 3])
+            pcb_grid(pcb, x, 0, 0.05)
+                solder_meniscus(pcb, 0.39, 1);
+}
+
+//! * Screw the Enviro+ PCB to the front of the case using M2.5 x 8mm pan screws with washer and nuts on the inside.
+module enviro_case_assembly() pose([ 231.40, 0.00, 1.20 ])
+assembly("enviro_case") {
+    case_assembly();
+
+    translate([pcb_x, 0, top_thickness])
+        vflip() explode(20, explode_children = true) {
+            t = pcb_thickness(pcb);
+            nut = screw_nut(pcb_screw);
+            washer = screw_washer(pcb_screw);
+
+            no_explode() enviro_assembly();
+
+            pcb_screw_positions(pcb) {
+                translate_z(t)
+                    screw(pcb_screw, screw_longer_than(t + bulkhead_t + nut_thickness(nut, true) + washer_thickness(washer)));
+
+                translate_z(-bulkhead_t)
+                    vflip()
+                        explode(20, explode_children = true)
+                            nut_and_washer(nut, true);
+            }
+        }
+}
+
+//! * Plug the RPi into the Enviro+ socket and secure with two screws self tapped into the bosses in the case.
+module RPI_case_assembly() pose([ 20.50, 0.00, 153.30 ])
+assembly("RPI_case") {
+    enviro_case_assembly();
+
+    translate([pcb_x, 0]) {
+        translate_z(top_thickness) {
+
+            translate(rpi_offset)
+                rotate([-90, 0, 0])
+                    RPI_assembly();
+        }
+        rpi_holes()
+            vflip()
+                translate_z(pcb_thickness(rpi))
+                    screw(pcb_screw, 6.4);
+    }
+}
+
+//! 1. Print the fan duct in flexible TPE with low infill.
+//! 1. Slide the pms5003 into the printed receptacle with the fan to the outside. Secure with tape if it is loose.
+//! 1. Slide the fan into the fan duct.
+//! 1. Slide the fan duct into the printed recepacle.
+module back_assembly() pose([ 228.60, 0.00, 24.30 ])
+assembly("back") {
+    translate(pms5003_pos)
+        explode(-50)
+            rotate([90, 0, 0])
+                pms5003();
+
+    explode(-20, explode_children = true)
+        translate(fan_pos) {
+            explode(-20)
+                fan(fan);
+
+            translate_z(-fan_depth(fan) / 2)
+                stl_colour(pp4_colour)
+                    render()
+                        fan_duct_stl();
+        }
+
+    translate_z(height + top_thickness + base_thickness + eps) vflip()
+        stl_colour(show_box ? pp1_colour : pp2_colour) render() enviro_plus_case_base_stl();
+}
+
+//! * Solder the fan wires to the veroboard assembly
+//!
+//! ![FanWires](docs/fan_connection.jpg)
+//!
+//! * Slide the back assembly into the case and secure with four M2 x 6mm cap screws and washers.
+module main_assembly() pose([170, 335, 0], exploded = false) pose([ 42.20, 0.00, 159.60 ], exploded = true)
+assembly("main") {
+    RPI_case_assembly();
+
+    explode(20, explode_children = true) {
+        pbox_base_screws(box);
+
+        back_assembly();
+    }
+}
+
+if($preview) {
+    if(assembly == "main")
+        main_assembly();
+    else if(assembly == "case")
+        case_assembly();
+    else if(assembly == "back")
+        back_assembly();
+    else if(assembly == "RPI")
+        RPI_assembly();
+    else if(assembly == "RPI_case")
+        RPI_case_assembly();
+    else if(assembly == "enviro_case")
+        enviro_case_assembly();
+}
+else {
+    gap = 5;
+
+    enviro_plus_case_stl();
+
+    translate([0, -depth - gap])
+        enviro_plus_case_base_stl();
+
+    translate([0, -2 * (depth + gap)])
+        bulkhead_stl();
+}