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Week-16 System integration

Week-16 System integration

This is my 16 week at FabAcademy. This week we needed to work on the integration of our final project. The assignment of the week is as follows:

  • Design and document the system integration for your final project

Final design and fabrication of the PCB

In order to start with the system integration of my final project, I started working on the redesign of my PCB. Previously I worked in serveral designs but my PCB had the inconvinient that it was designed for having servos fed by 3.3V, whereas due to the relatively heavy task they need to deliver (opening closing methacrylate gates) it is necessary to fed them by 5V. As usual I worked in KiCad and here you can see a summry of the resulting PCB with refined design:

  • Schematic of the PCB:

  • Design of the PCB:

  • Gimp edition prior to machining:

  • VCarve programming for machining:

  • Resulting PCB:

Summary of the system components

Microcontrtoller: one XIAO ESP32C3 microcontroller.

Inputs: 2 DHT11 moisture and temperature sensors for reading air moisture and temperature within the air layer of the wall element. BH1750FVI light sensor for dectecting natural sunlight and therefore, deciding energy source (solar or battery)

Outputs: 2 Servos.I will try first with the ones I have in my inventory (Micro Servo MG90S) for the opening/closing of the gates. In case it does not work I will try to accomplish this with another servo, 1 Oled Screen (already in my inventory) for monitoring temperature and energy consumption.

Energy supply: 1 solar cell NIVIAN 9W with micro USB, 1 module VISSQH 5 pcs 5V 1A Type-C USB 18650 with battery and volatage boosting for storing solar energy and upscaling the output to 5V, 1 diode (already in my inventory).

Electronics integration: 1 printed box parametrized for electronics integration.

Material necessary for the construction of the fassade element: 6 methacrylate plates of 1000x700 mm and 3mm thick, four 2400x400x28 mm pine (Pinus sylvestris) boards, common wood adhesive.

Integration of all components in the system

In the following image I illustrate the integration of all components of my system.

Files for download and replication

Here you can download the files of my final PCB design, including all relevant files (Kicad Schematic, PCB editor and project, Gimp edition and VCarve file): Final_PCB_Design.