Project

# Title Team Members TA Documents Sponsor
25 SOLAR POWERED PORTABLE WATER FILTER
 Aarnav Bhargava
Alberto Martinez Linera
Zihao Zhou
 Qingyu Li design_document2.pdf
final_paper1.pdf
other1.txt
photo2.jpeg
photo1.jpeg
presentation1.pdf
proposal1.pdf
# Team Members:

- Aarnav Bhargava (aarnavb2)
- Alberto Martinez Linera (am91)
- Zihao Zhou (zihaoz4)

# PROBLEM
There are a lot of places in the world where people do not have access to clean drinking water. A lot of people are not able to filter the water because they have to take water directly from natural sources like rivers and lakes. Filtering services are also expensive to use for quite a few of these people. Quite a few people cannot use these filters or RO devices as they do not have proper access to electricity.

# SOLUTION
We propose the creation of a portable water filtration device that is solar powered. The filter would filter water collected from any place. Then it would use UV lights to disinfect the water. There would also be an indicator on the device that tells the user if the filter needs to be replaced or not.

# SOLUTION COMPONENTS
- **SUBSYSTEM 1**

The filtration system and the filter replacement indicator (using a water flow sensor). We would be using a filter to filter pollutants from the water. After the water is filtered it would go through the water flow sensor. The microcontroller would access the water flow levels and determine if the filter is working properly or if we need a replacement. If such a need arises, we would have an LED on the outside of the container that would light up.

- **SUBSYSTEM 2**

Then the water will be treated through UV lights. The time of UV light working and the strength of the UV light will be designed to kill a decent percentage of bacteria in the water. There will be an indicator to tell you when it has finished being treated. The shell of the device will be designed to be opaque so UV light won’t hurt the users.

- **SUBSYSTEM3**

Our project will be working using solar energy. We will use a little solar panel and a dc-dc converter to power the UV light as well as the microcontroller.

- **SUBSYSTEM 4**

We would be using a microcontroller to control the water flow sensor, the UV light treatment indicator, and to control the power of the UV light.

# CRITERION FOR SUCCESS
- Describe high-level goals that your project needs to achieve to be effective. These goals need to be clearly testable and not subjective.

- Demonstrate that water has been purified by our project by measuring the bacterial content as well as the turbidity before and after use of our filter (only to demonstrate).

- Demonstrate that our project works on solar energy.
- Demonstrate that the water filter indicator works.
- Demonstrate that the UV light does not come out of the container damaging the skin of the users.
- Reduce its weight to make it portable.

Covert Communication Device

Ahmad Abuisneineh, Srivardhan Sajja, Braeden Smith

Covert Communication Device

Featured Project

**Partners (seeking one additional partner)**: Braeden Smith (braeden2), Srivardhan Sajja (sajja3)

**Problem**: We imagine this product would have a primary use in military/law enforcement application -- especially in dangerous, high risk missions. During a house raid or other sensitive mission, maintaining a quiet profile and also having good situational awareness is essential. That mean's that normal two way radios can't work. And alternatives, like in-ear radios act as outside->in communication only and also reduce the ability to hear your surroundings.

**Solution**: We would provide a series of small pocketable devices with long battery that would use LoRa radios to provide a range of 1-5 miles. They would be rechargeable and have a single recessed soft-touch button that would allow someone to find it inside of pockets and tap it easily. The taps would be sent in real-time to all other devices, where they would be translated into silent but noticeable vibrations. (Every device can obviously TX/RX).

Essentially a team could use a set of predetermined signals or even morse code, to quickly and without loss of situational awareness communicate movements/instructions to others who are not within line-of-sight.

The following we would not consider part of the basic requirements for success, but additional goals if we are ahead of schedule:

We could also imagine a base-station which would allow someone using a computer to type simple text that would be sent out as morse code or other predetermined patterns. Additionally this base station would be able to record and monitor the traffic over the LoRa channels (including sender).

**Solutions Components**:

- **Charging and power systems**: the device would have a single USB-C/Microusb port that would connect to charging circuitry for the small Lithium-ion battery (150-500mAh). This USB port would also connect to the MCU. The subsystem would also be responsible to dropping the lion (3.7-4.2V to a stable 3.3V logic level). and providing power to the vibration motor.

- **RF Communications**: we would rely on externally produced RF transceivers that we would integrate into our PCB -- DLP-RFS1280, https://www.sparkfun.com/products/16871, https://www.adafruit.com/product/3073, .

-**Vibration**: We would have to research and source durable quiet, vibration motors that might even be adjustable in intensity

- **MCU**: We are likely to use the STM32 series of MCU's. We need it to communicate with the transceiver (probably SPI) and also control the vibration motor (by driving some transistor). The packets that we send would need to be encrypted (probably with AES). We would also need it to communicate to a host computer for programming via the same port.

- **Structural**: For this prototype, we'd imagine that a simple 3d printed case would be appropriate. We'd have to design something small and relatively ergonomic. We would have a single recessed location for the soft-touch button, that'd be easy to find by feel.

**Basic criterion for success:** We have at least two wireless devices that can reliably and quickly transfer button-presses to vibrations on the other device. It should operate at at *least* 1km LOS. It should be programmable + chargeable via USB. It should also be relatively compact in size and quiet to use.

**Additional Success Criterion:** we would have a separate, 3rd device that can stay permanently connected to a computer. It would provide some software that would be able to send and receive from the LoRa radio, especially ASCII -> morse code.