Subsystem Build & Test
Table of Contents
Team Vision for Subsystem Level Build & Test PhaseMSDII Second Phase Summary:
- This phase saw our team mitigate some issues concerning the solenoid mixing as well as some other small risks. As is with many design projects we face a lot of unknown issues. This phase uncovered a problem where we could not detect an emission from our BSA (bovine serum albumin). Through testing and exploration we were able to develop several probable root causes to this issue. The filter may be too steong, the BSA emits at a wavelength just outside of our filter's range, the emission may be weak, or perhaps our sensor isn't sensitive enough to detect it.
- With several solutions in mind we are aiming to test various methods of correcting the issue of no emission. Ordering a more sensitive photo diode, using a tryptophan stand-in (3-Methylindol) to provide precise emission wavelength, and implementing an OP-Amp circuit to increase any readings the sensor may get to a more visible level. Below is a Gantt Chart that has tracked our team's progress and has been updated with tasks for the coming phase.
Current State Gantt Chart:
Test Plans and Results
The circuit diagram in the lower right hand corner is the schematic for the transimpedance amplifier that the current photodiode uses in order to amplify the nA current to voltage levels the micro-controller can read.
This circuit will be used when we obtain the new photodiode. Unfortunately, we will not be able to verify it works with hardware until we get the photodiode. Regardless, we have done all we can with simulations and acquiring all the other components.
The following images contain the PCB design
Microfluidic Device Iteration #4 - Improved from Device Iteration #3Properly spaced wells for having solenoids and LED centered Adjusted depths of wells to allow for complete expulsion of reagent from Well 3 Extended length for more secure top layer adhesion and better fit within subsystem Overall Width: 15 mm, Overall Height: 45 mm
Future Test Plans3-METHYLINDOLE Test
Structural EngineeringThermal Test Plan
List of elements required for Space Launch.The goal of our project is to make a spectroscopy system for proteins which can fit inside a CubeSat. However, for a CubeSat to function in Low Earth Orbit (LEO) it requires a number of elements which we have not integrated into our system due to the scope of our project.
Risk and Problem TrackingSubsystem Build and Test Risks
Current Phase Problem Tracker:
Functional Demo Materials
Plans for next phaseMallory Rauch's Three Week Plan : Mallory's Goals
Anna Jensen's Three Week Plan : Anna's Goals
James Lewis's Three Week Plan : James's Goals
Darin Berrigan's Three Week Plan : Darin's Goals