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...