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Transcript
Project #1 Smart Sprinkler Robot System Introduction Features • • • • Weather Forecasting Soil Moisture Wireless Communication GPS Base Station Hose Actuator • Controls Water Flow Hose Actuator Circuit JTV-100 Hose Actuator Power Electronics • • • 5V LDO (Low-Dropout Regulator) Regulates Battery Powers Transmitter and Receiver Microcontroller • • • Arduino Mega 2560 Communicates with Robot Sprinkler Controls Sprinkler Arduino Mega 2560 Internet • • • Arduino Ethernet Gathers Weather Forecast National Weather Service Arduino Ethernet Wireless Communication • • • • RXM-900-HP3 Receiver TXM-900-HP3 Transmitter Serial Communication Multiple Channels Wireless Communication System Transmitting at 906.28 MHZ Wireless Communication Circuit Robot Communication GPS • • Provides Robot Location Navigation Sparkfun Venus GPS Robot Power Batteries • • Car Battery Powers Motors Small Battery Powers Circuits Car Battery Small Battery Power Electronics • 3.3 and 5V LDO (Low-Dropout Regulator) • Regulates Battery Supply Transmitter, Receiver, GPS, and Arduino • Gate Drivers • • • • LT1160 Power MOSFET Driver IRF530N Power MOSFETS Short circuit protection PWM (Pulse Width Modulation) H-Bridge Diagram Gate Driver Circuit Protection Example • • • • Duty Cycle : 25% Frequency : 32 kHz Input Voltage : 5V Output Voltage : 12V H-Bridge Circuit Robot Motors Microcontroller • • • Arduino Mega 2560 Controls Sprinkler Robot Records Soil Resistance Navigation • GPS location Navigation • • Drive Forward GPS location Navigation • • Calculates Angle to Destination Rotate Navigation • • Drive to Destination Repeat Drive Motors • • Moves the Robot Failed Verification 1LPV6V Motors Soil Probe Motors • • Insert/Remove Probe Potentiometer Safety Soil Probe • • Measures Soil Resistance Voltage Divider Rule Challenges • • • Wireless Communication Antennas Mechanical Issues Battery Voltage Spikes Thank You • • • • • Professor P. Scott Carney TA Mustafa Mukadam ECE Machine Shop ECE Electronic Shop MIT Lincoln Lab Questions? I Have Many!!
