justin project › justin moninger car accident different technologies › 300mhz › 433mhz...
Post on 20-Dec-2015
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Justin Project› Justin Moninger
Car Accident
Different Technologies› 300Mhz› 433mhz
History
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Transmitter/Receiver› 433Mhz› Accelerometer› Comparator› Dip Switches
Version 1.0
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Goals Met› No User Input› Range› $$$ - Cheap› Weather Proof
Accomplishments
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Problems› Excessive Power Use
Charging Circuit› Cumbersome Enclosure
Project Goals for this Year› Redesign to use less power› Design a smaller transmitter› Incorporate directional signal propagation
Issues and Problems
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Budget from CSU› $50 dollars per individual
Total 100 dollars (2 Students are from independent study)
Budget
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Sources› Monetary› Transceivers
Donations
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Trusts and Foundations› Kroh Charitable Trust
Loveland, CO – Focused on helping Community
› Anheuser Busch Justin Moniger had a close friend working here
› Anshutz Foundation A foundation focused on helping society
› Craig H Nielson Foundation Similar to Anshutz
Monetary Donations
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Panasonic› Zibee Modem P4555
Linear Technologies› RS2802 Tranceiver
Vishay› Vishay RFW3M
Transceiver Donations
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Panasonic (Zigbee Modem) High level communication protocols (WPANs) 16 channels, size (20 digital I/O lines), Power (120mW)
Vishay (RFW3M) Power (129mW), frequency agility (3 operating channels) A three wire serial bus for programming (data lost)
Vishay (RFW122) Power = 22mA×3.3V = 72.6 mW (Transmitting mode) Amplitude Shift Keying (ASK) 3 line serial digital data I/O line interface
Transceivers
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Chair Circuit
Test Setup
Schematic
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Needed to limit current consumption› Changed to CMOS 555 timer circuits› Used Linear Voltage Regulator› Used CMOS inverter
Changed to Vishay Transceiver› Much less power consumption› 11 X 15.9 mm› Transmit and Receive for future handshake
applications.
Chair Circuit Specifications
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Needed Characteristics› Directional › Easy to make› Work with Vishay
Solution › Dipole Antenna
Antenna Design
http://www.trevormarshall.com/byte_articles/byte1.htmhttp://en.wikipedia.org/wiki/Dipole_antenna
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Future plans for Door Circuit› Need to filter out transmitted signal
Vishay outputs noise when not receiving signal.
Need to filter out unwanted signal.
› Use Vishay's abilities to do handshake
Future plans for Chair Circuit› Make circuit rechargeable.› Put circuit on PCB
Future Circuit Plans
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Advisor: Olivera Notaros Donations:
› Ashley Waddell› Patty Meeke of Panasonic› Leanne Bernstein of Vishay› Christopher Gobak of Linear Technologies› Guy Wagner for support› Pat and Terry for continued support
Thanks Too