ENGR-103-065, Group 10: Project Pip-Boy

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. 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...

This week we finished a few tasks such as finalizing the CAD design for our device and soldering everything to the Arduino Nano. The parts of our devices were soldered to save room on our device to cut down space taken up by bulky wires and pins. This also helps ensure that there is always a good connection between the components. The design we decided to go with is a two piece body. One to go on the top of the wrist and one to go on the bottom. The top compartment will house the primary parts of the device such as the Arduino and the breadboards, and the bottom will hold the battery and sensors. To run the wires from the Arduino to the battery and sensors in the bottom the wires will run through the armband itself in between the layers.  Figure 1: This is the design for the top part of the device.  Built into the sides of the body pieces are slots to secure the armband on both sides as shown in Figure 1. Also shown in Figure 1 is the small slot to secure the sc...

Week 7: Software Updates                   In addition to the electrical updates we accomplished, we also produced a rough sketch of the finalized Arduino code.  Since our group hasn't had a working Arduino Nano like we had hoped, we tested most of the sketch on an Arduino Uno that was given to us.  Thus, we don't currently know whether the Nano has the storage space to hold the sketch like the Uno.  Arduino: Below are screenshots of our most current Arduino sketch:                The overall purpose of the code was to establish a connection with an external bluetooth device and an app such that the Arduino could transfer data from the sensors (pulse-rate and temperature) to the app and have the app plot the data and alert an emergency contact if one of the two vitals exceeded a healthy boundary.                 ...

Week 7 Updates: Electronics             This past week a ton of advancements on our project were made, mostly dealing with software and the electrical design and construction: Electrical Updates:                This week our group finally got all of the electrical components that are going to be incorporated in the PipBoy circuit, and we also produced a rough schematic of how to build the Arduino circuit. Figure 1. First design of the Arduino circuit                There are a couple important things to note with the schematic; first being that the software used to design the schematic, Fritzing, didn't have a graphic for a 1200 mAh, 3.7 V lithium-polymer battery, so the one for the 1100 mAh was used instead since they have roughly the same physical size. Similarly, the pulse-rate sensor that we are incorporating in the final product is not the same model pict...

As we approach the deadline for the first draft of the final paper, we are beginning to put all of the pieces of the project together. Preferably, we're looking to assemble a prototype of the device by the end of the week.  The group met up on May 7th, the day before lab, to develop an agenda for the rest of the week. Additionally, roles for the final paper were distributed amongst the group. We aim to have a fairly developed first draft, something that could be comfortably submitted as the final paper to allocate more time for the physical prototype. In this week's lab we plan to: 3D print the CAD file of the chassis device Saw the edges of the device's breadboard to minimize size Solder Arduino pins & M/F wires Test receiving/sending data between companion app and device

In brief, this week, we made tangible progress in terms of assembling the actual device, and furthermore, in the development of the companion Android app. To elaborate: All of the materials on the BOM ( available in Week 3 Updates ) were delivered CAD drawings were made of the parts of the device that are to be 3D printed ( drawings provided in separate update ) Arduino code was written for the heart-rate sensor and the mini-screen modules for the PipBoy device The Android app's sign-in screen UI and code was developed using MIT App Inventor 2 as an alternative to Android Studio, which we had been using thus far The logo was made in order to use for the app i.e. on sign-in screen, loading screen etc. It is provided below: Further code is being developed for other modules and aspects such as the body temperature sensor, interfacing the PipBoy device with the app through Bluetooth, further coding to optimize the mini-screen's communication with the Arduino and its modul...