Project

# Title Team Members TA Documents Sponsor
8 Portable In-line Audio Equalizer
 Ankit Jayant
Avinash Subramaniam
Ji Yeon In
 Prashant Shankar appendix2.zip
design_document1.pdf
design_document2.pdf
final_paper1.pdf
photo1.png
presentation1.pdf
proposal1.pdf
Ankit Jayant (ajayant2) , Avinash Subramaniam (avinash6) , Ji Yeon In (jiyeoni2)

**Problem** There are people that want to listen to various audio, such as music or video, at a different equalization than what is currently given. This may especially be the case if they have hearing loss at certain frequencies. It can also be bothersome to download potentially different equalization apps on different devices or run into situations where an app may not even be available on the device.

**Solution Overview** A singular device will be created to achieve the necessary equalization. The device will allow a listening device (e.g. headphones) in a combination with any of the audio playing devices (e.g. laptops, phones, MP3 players, etc.) to achieve the equalization necessary.

Our device will be powered by batteries. It will have one 3.5mm headphone jack that is able to transmit our augmented audio data and one 3.5mm headphone connector capable of receiving audio data for interpretation. The device will need a headphone driver so it is able to interpret the raw data coming from the device.

The device will have two main subsystems. One subsystem involves the selection of an equalization level and the other subsystem involves the manipulation of audio going from the audio playing device (e.g. phone) to the listening device (e.g. headphones).

**Solution Components**

- Subsystem 1: The audio subsystem is responsible for enacting whatever equalization the user selects. A microcontroller will be used in order to do this through filtering. Additionally, there will be an audio codec to process the audio data that is received and transmitted through the 3.5 mm ports.

- Subsystem 2: The control system will be connected to the microcontroller. This will consist of a PCB that has options for user control, like toggles and buttons. There will also be an LCD screen which allows the user to view their control options and how their inputs are affecting the audio output with low latency. For example, a user may select a bass heavy audio option through a control unit and it will be reflected in the audio device with low response time.

**Criterion for Success**

- The device is able to accurately change the desired levels of frequency.
- The device is portable.
- The device should be able to be used by a user without an electrical or computer engineering background. Being able to control which equalization setting the device is on is simple.
- The device is compatible with any device transmitting audio through a 3.5 mm jack.

S.I.P. (Smart Irrigation Project)

Jackson Lenz, James McMahon

S.I.P. (Smart Irrigation Project)

Featured Project

Jackson Lenz

James McMahon

Our project is to be a reliable, robust, and intelligent irrigation controller for use in areas where reliable weather prediction, water supply, and power supply are not found.

Upon completion of the project, our device will be able to determine the moisture level of the soil, the water level in a water tank, and the temperature, humidity, insolation, and barometric pressure of the environment. It will perform some processing on the observed environmental factors to determine if rain can be expected soon, Comparing this knowledge to the dampness of the soil and the amount of water in reserves will either trigger a command to begin irrigation or maintain a command to not irrigate the fields. This device will allow farmers to make much more efficient use of precious water and also avoid dehydrating crops to death.

In developing nations, power is also of concern because it is not as readily available as power here in the United States. For that reason, our device will incorporate several amp-hours of energy storage in the form of rechargeable, maintenance-free, lead acid batteries. These batteries will charge while power is available from the grid and discharge when power is no longer available. This will allow for uninterrupted control of irrigation. When power is available from the grid, our device will be powered by the grid. At other times, the batteries will supply the required power.

The project is titled S.I.P. because it will reduce water wasted and will be very power efficient (by extremely conservative estimates, able to run for 70 hours without input from the grid), thus sipping on both power and water.

We welcome all questions and comments regarding our project in its current form.

Thank you all very much for you time and consideration!