Approaching the final weeks of ENGR-103, we have made significant developments in our project, mostly having to do with hardware. With regard to software, the code for the Arduino, the sensor modules, the screen etc. have been produced, and will be uploaded soon.
CAD and 3D Prints
As shown in the previous update, the CAD sketches were made using Autodesk Fusion 360, and there were five pieces required for the full assembly of the device. The parts had to be reprinted on several occasions due to random errors in the printing process, but as of the end of Week 8, they have been produced with the desired dimensions and color, as shown in the photograph below.
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| Figure 1: 3D printed materials with excess ABS plastic |
These are the final prints that will be used for the assembly of the device, being used to hold components such as the Arduino Nano, the LCD screen, the sensors, the battery, the wiring, and the velcro lining in place.
Device Circuitry
The sensors had been wired to an Arduino Uno for the first few weeks for testing before the Arduino Nano was received. Therefore, the components had to be disconnected from the Uno, connected to the Nano, and soldered according to the following schematic:
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| Figure 2: Schematic of PipBoy circuitry with Arduino Nano |
Smaller wiring was used to optimize space, which made the soldering process more convenient. This was one key difference between the schematic and the real-life circuit, in that the wiring appears much larger in the diagram than it really is.
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