User:Jshin722/ENES-100/project 2

This is designed for a person working on a project for 4 weeks as part of a 3 credit class.

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Week0 Preferences
1. Access control 2. RAM 3. SDR Carhack

Week1 Narrative
My task was to get the arduino to sense a vibration ("knock") and to produce an output.

Week2 Narrative
The program on the Arduino website did not work. The program from the previous semester's group, which had never been tested, did not work. The internet was searched for a substitute program. A program found on /Instructables.com/ was used to test the knock sensor's input (a knock) sensing abilities. The threshold for an input (a knock) was defined in the program so a certain force of knock was required for the Arduino to sense the input and send out an output signal. The program was uploaded onto the Arduino. A small speaker was used as a piezo element. The plastic housing was left intact. Using a soldering iron, two wires were soldered onto the speaker. The two wires were inserted into the Arduino: Analog A0 and GND. When the piezo was flicked the Arduino detected the voltage produced and produced an output which was indicated by a blink of a light. Then the piezo was placed firmly against the desk and a knock was produced on the bottom side of the desk, to simulate a door. As long as the knock was strong enough, the input was detected. However, if the knock was even slightly weaker, there was no output since the threshold for the voltage was too low as defined in the program.

/Arduino detection of knock and resulting output/

Week3 Narrative
My task was to learn about the throat microphone so that it may be used as an input sensing device, i.e. a replacement for the small speaker. A throat microphone detects vibrations of the wearer's throat using a sensor called a "transducer." A transducer would be preferable to a piezo since it can detect very small vibrations and works in noisy environments.

I tested the throat microphone by connecting it to my smartphone, wearing around my neck, and using voice command. It worked very well, able to pick up even a whisper with accuracy. It works even better than the phone's built-in voice command function.

/Throat Microphone/

Week4 Narrative
CDIO pages were organized for the next group.

/Arduino Knock detection/

/Throat Microphone/

Next steps are outlined in the Throat Microphone CDIO page.