P19571: Solar Spectrograph
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Subsystem Build & Test

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

Plan for this phase was to design a PCB for status light, write a parent software and Have the hardware and software talking with each other using Arduino and being able to move the dish through a serial command in Arduino. The team was able to accomplish this phase.

Test Plans

 Test Plans

Test Plans

To ensure that the system will work under all conditions, a series of extensive tests were designed, for both the independent subsystems and the full, integrated system.

Hardware

 PCB Layout

PCB Layout

A PCB for status light was implemented. Status light is composed of MSP430 microcontroller, which is connected with PC and the PCB with resistors, mosfet and LED. The status light consists of three LED status; green LED is for an active dish, with no problems, yellow is for warnings or service needed, and red is for critical failure.

Status Light Schematic

 Test Plans

Test Plans

The receiver was placed inside the Faraday cage, along with the cables that run to the computer to ensure the cable wasn't acting as an antenna to noises in the lab each load was tested.

Software

The server made by the previous team did not respond when ran. Resulting in various error which are involved around the dish, for example, the accelerometer was not connecting thus resulting in the dish in a loop. Arduino was used to debugging the sun tracker software. If the dish can not rotate in arduiino then the server would not work. Arduino software was used to check if the dish can rotate 360 degrees and if the linear actuator is able to extend and shrink all the way. Approach to connect with Arduino is to go in device manager and make sure the COM port is the same as COM port in Arduino software and making sure baud rate for both is also left at 115200. Turn on Arduino, compile and upload code in Arduino Mega then open Arduino terminal and initialize and run.

Risk and Problem Tracking

 Risk Assessment

Risk Assessment

Plans for next phase

Plywood box frame w/ 2x4 support braces and feet or Rebar “handles”/loops


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Build & Test Prep | Subsystem Build & Test | Integrated System Build & Test | Customer Handoff & Final Project Documentation