Solar Sausage Project Water Purification Device 2/17/16

Team Members Brandon Phillips : Project Manager Jose Viquez : Lead EE Christopher Ritchie : Financial Advisor Brett Thompson : Systems Engineer Taiwo Ojo : Systems Engineer Taylor Borders : Test Engineer

Brandon Phillips

Solar Sausage Overview ◈ Water Pasteurization/Filtration ◈ Details ◈ Transparent Mylar (2 Mil) ◈ Reflective Mylar Center ◈ 2 Chambers ◈ Top : 0.5psi ◈ Bottom : 0.475psi ◈ 2 Air Ports Per Chamber

Solar Sausage Mounting ◈ Homemade Wood Mounts ◈ Stability ◈ Portability ◈ Via Tracking System ◈ Connected via sealed ends ◈ L Bracket ◈ Bearings

Jose Viquez

Circuit Diagram Of the System

Power Supply

Solar Panels 25W ◈ Panel Rating ◈ Voc = 25V ◈ Isc =1 A ◈ Glass encapsulated thin Film Solar Cells ◈ 5% Efficiency ◈ Two parallel connected Panels ◈ OUT: 50 W at 2A

I-V Characteristics

20A Charge Controller ◈ Under-voltage and over-charging protection ◈ Reverse discharging & reverse- polarity protection ◈ Battery Level Indicator

Battery Module ◈ 12V 7Ah Lead Acid Batteries ◈ 2 Batteries Series connected ◈ 24V 14Ah

Taiwo Ojo

Voltage Control ●The voltage control is achieved using a buck converter circuit. ●The buck converter circuit has an efficiency of 95% and above compared to a linear regulator ●The voltage is stepped down from 24V to 5V at a specified current ●The voltage is stepped down from 24V to 12V at a specified current for the relay channel

Universal battery eliminator circuit (UBEC) ●DC/DC step down converter from 6V - 24V to 5V, 3A ●It controls the voltage going to the microcontroller (Beaglebone) ●Unlike other voltage regulators, it does not require any heat sink.

Analog Control Buck Converter DC-DC Step-down Voltage Regulator Module ●DC - DC step down voltage regulator from V to V, 2A ●Used for the pressure regulation voltage control ●The voltmeter screen provides means of monitoring the voltage output/input

Brett Thompson

Control System Diagram

DC/STEPPER MOTOR DRIVER BREAKOUT BOARD ◈ Powered from 12 V of battery ◈ Allows motor to be run with 12 V at.35 mA but still be controlled by the microcontroller

DC/DC 2 CHANNEL RELAY MODULE ◈ Connects solenoid valve to battery ◈ Controlled via our microcontroller ◈ Allows voltage from microcontroller to dictate when the 12 V from the battery flows to the valve

Solenoid Valve Change New Valve: ◈ Doesn’t require a minimum pressure Old Valve: ◈ Required minimum 3 psi through the valve to work Plastic Water Solenoid Valve - 12V - 1/2" Nominal 3/4 inch 12V DC VDC Plastic Nylon Electric Solenoid Valve NPT

Controls System ◈ Beaglebone Black microcontroller has been purchased ◈ Will be coding using Arduino IDE ◈ Latest Beaglebone debian image include userspace arduino libraries ◈ Simply create file with “.ino” extension and add to autorun folder to boot program at startup ◈ Ready to begin programming

Taylor Borders

Air Pressure Regulation ◈ Maintain the 0.5psi in top chamber and 0.475psi in bottom chamber ◈ Obtain Prior teams Setup ◈ Modifications ◈ Micro-Switch ◈ Air Pump ◈ 5V ◈ 0.5A

Pressure Regulation

Christopher Ritchie

Tracking System ◈ Light Sensors vs. Hardcoded ◈ Implementing a hardcoded system ◈ Reasoning ◈ Simplicity ◈ Cost

Tracking System Continued… ◈ Stepper Motor ◈ Gear System ◈ Belt Driven ◈ Longer Lasting ◈ No maintenance ◈ Lighter ◈ Roller Bearings ◈ Easy Rotation ◈ Sealed Bearings

Filter System ◈ Cascading Filter Design ◈ Built with easily obtainable materials ◈ Biolayer ◈ Future Efficiency & Flow Rate Testing

Budget