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