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Justin Project› Justin Moninger
Car Accident
Different Technologies› 300Mhz› 433mhz
History
Transmitter/Receiver› 433Mhz› Accelerometer› Comparator› Dip Switches
Version 1.0
Goals Met› No User Input› Range› $$$ - Cheap› Weather Proof
Accomplishments
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
Budget from CSU› $50 dollars per individual
Total 100 dollars (2 Students are from independent study)
Budget
Sources› Monetary› Transceivers
Donations
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
Panasonic› Zibee Modem P4555
Linear Technologies› RS2802 Tranceiver
Vishay› Vishay RFW3M
Transceiver Donations
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
Chair Circuit
Test Setup
Schematic
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
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
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
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