ULTRASONIC TRANSMITTER Amanda Hellberg, Brandon Ravenscroft, Jonathan Owen, and Kai Gustafson TEAM B-CDR

LEVEL 0: RADAR SYSTEM Programmable Amplifier Buffer Amplifier Impedance Matching Network Transducer On-board RCVR Arduino DUE DAC ADC Test Point Echo from chirp Output Chirp Test Point

SCHEMATIC: RADAR SYSTEM

16-ELEMENT ULTRASONIC TRANSMITTER

TRANSMITTER SYSTEM AND SINGLE CHANNEL RECEIVER TEST Transmitted Chirp Received Chirp Beat Waveform

BEAT WAVEFORM AND SPECTRUM Beat Waveform Spectrum Beat Frequency (Range = 53.6 cm) *Transmitter and Receiver Separated by 53 cm

MIXER SPECTRUM TEST LO = 34.5 kHz RF=40.0 kHz

MIXER OUTPUT SPECTRUM (FILTERED) Mixer Output (IF) Post-Filter Transmitted Sinusoid Mixer Output (IF) Spectrum Down Conversion (6.5 kHz) Up Conversion (74.5 kHz) LO Signal (34.5 kHz) RF Signal (40 kHz) Suppression: 23 dB

HOW TO ACCOMPLISH THIS

PROJECT MANAGEMENT

GANTT CHART

RISKS Input Power to Arduino Due Risk: The Arduino Due can only have an input of 3.3 V unlike the Arduino Uno having 5 V.  Mitigation: Zener diode limiter (clamping circuit.) Collaboration with Team Receiver Risk: Improper co-location with Receiver Team.  Mitigation: Keep in close contact with Receiver team upon design of final board. Scheduling Risk: Not having the code and/or board complete by deadlines.  Mitigation: Sticking to Gantt chart schedule to ensure project components are completed on time. Risk: Manufacturing company lead times being inaccurate.  Mitigation: Board design submitted two weeks early in event of delay. Test Points Risk: Having a completed faulty board and no way to connect to certain areas to test.  Mitigation: Insert appropriate test points in design.

QUESTIONS?