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AeVOC Housing for C´T 2021/3 Project

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3D model description

#Air Quality Sensor AeVOC
##Alternate Housing

This is a alternate Housing for a air-quality-sensor, published on C´T (Computer and Technology) 2021/3 Page 118
This device analyses ambient air about fine dust, aerosols, carbon dioxide and hydrocarbons. The device is displaying measurements on a OLED display and a array of
WS2812. The uses CPU-Module is a ESP32 (NodeMCU). All measurement datas are alternatively streamed into the WLAN or can integrated in houseautomation.

Sourcecode, Schematic and all other stuff is placed here:

Motivation of this thing:
This project looks very fine but in original, a housing of wood was given wich was very big and aditional, a fan was planned for ventilation air to CS811 and DHT22-Sensor.
First, why wasting place with such housing an why a **second
fan. SDS11-Sensor has a build in radial fan wich is very silent and is doing it´s job.
So i started to make a alternate housing with special features.
Enjoy! The SDS11 Fan is sucking air for analysis aim on the top of the housing. After passing SDS11 fine-dust/aerosol analysis air will be blowed on CS811 and DHT22 for further analysis.
Exausts is designed on the upper side wall, so any warming oft the air will build thermic-effect and helps venting sensors.
This housing is printfriendly means it is easy to print and needs no support

For the powersupply i used this components:
Bush 5.5mm x 2.1mm: [Link]

Dim down LEDs. This saves your life, your eyes and reduces sefheating of AeVOC!!!

Additional you need a short (5mm..10mm) Tube (about 5.5mm..5.7mm in diameter, 6.5mm out diameter (or a shrink tube, i used) and 2 3mm screws length about 3..6 mm

All wires i used had a length of 80mm. You don´t need longer cables.

#Housing is mounted in this order:

Place Front part, face down.
Put LED-Array into Front part and put OLED-Display into forseen moulding area
Insert "Andruckplatte". This part holds LED-Array and OLED in position
SDI-Part has to be prepared with hot air like shown on photo. The function is to build springs wich are pressing the "Andruckplatte" about 2mm.
Insert SDI-part. Put CS811 and DHT22 Sensor in forseen place (you can glue it if you want, or use tape)
Put SDS11-Sensor on forseen 3 pins. Fan should now be placed exactly to the sensors
Mount a small Tube (Shrinktube is also possible) on intake of SDS11 so Air will be sucked outside the housing.
Plug the ESP32-Module on the forseen terminals and fix it with a hot nail by melting ends of terminals
Put the CPU-part with mounted ESP32 on the stack.
Mount the Power-bush on Back-part
Close housing with the Back-part by pushing it together and use 2 3mm screws to fix everything.
Glue the exaust-cover "Lueftung" on the housing.

The exaust hole is 20mm x 20mm. You can personalise your AeVOC-device by making your own grid/cover (Smiley, Sun, Cloud, ...)

3D printing settings


3D printer file information

  • Design number: 336348
  • 3D design format: STL Folder details Close
    • AeVOC_Andruckplatte.stl
    • AeVOC_Back.stl
    • AeVOC_CPU.stl
    • AeVOC_Front.stl
    • AeVOC_Lueftung.stl
    • AeVOC_LueftungSmile.stl
    • AeVOC_LueftungSmile2.stl
    • AeVOC_SDI.stl

    Learn more about the formats

  • Publication date: 2021-03-21 at 01:02
    Published to Thingiverse on: 2021-03-20 at 16:36


CC BY - Attribution


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