1. Tsz Hang Yung Andrew Strobel Mahdi Massey Brian Rosenberger
TOP CAT : PHASE II P12352
Tsz Hang Yung
Andrew Strobel
Mahdi Massey
Brian Rosenberger

2. Problem
House cats maintain territories of considerable size, ranging from 6 – 70 acres
Cats may enter different territories and engender territorial conflicts unbeknownst to owner(s)
Violence may lead to serious injuries and infection (as well as costly veterinarian bills)

3. Goals Two short range devices which would prevent such a fight
Devices should fit on cat collar but not restrict movement
Trigger at specified range
Deter cats from each other in safest manner possible

4. Customer Needs
Compact devices that fit on a collar (Weather/Cat Resistant)
5’ – 25’ Range
Both collars detect each other and go off concurrently
On/Off Switch
Operation indicator
Low battery detector
Effective but safe stimulus
Increasing stimulus (Linear or Exponential)
Alert Owner*

5. Specification (metric)
Engineering Specs
Revision # 3
Spec. #
Importance
Specification (metric)
Unit of Measure
Ideal Value S1 2
Transceiver on the collar
N/A S2
Receiver on the collar S3 1
Range of device / maximum distance
Feet
0' - 30' S4
Range of deterant S5
Safe Stimulus dB
1kHz - 40 kHz S6
Switch added between power and the circuit V V S7
Enclosure size
Inches
0.8"x1"x0.5" S8
LED Indicating the device is powered
Feature S9
LED Indicating the battery is low
2.7
S10
Battery Life Cycle
Hours
> 4
S11
Circuit Enclosure
S12
Detection Time ms
S13
Burst of Signal s
S14 3
Both collars go off within a certain amount of time 6

6. Top Cat: Phase I Previous Team
Used RF as detection agent
Feasible, but not the best technology when determining distance
Boards could not meet size specifications

7. Phase II IR as a detector instead of RF
Low power usage
Portability maintained
Simple
Smaller in size
Analog exclusive instead of digital

8. System Breakdown

9. System Operation IR receiver and emitter on both collars
LED transmits 33 kHz modulated signal
Receiver scans for 33 kHz signal
Once signal is acquired, receiver triggers deterrent
Deterrent separates cats away from one another

10. Circuit Schematic

11. Proof of Concept

12. Detection Range Test Results
In the Sun
In the Shade

13. Alert Owner - RF Transmitter
Schematic
Hardware

14. Alert Owner – RF Test Results
Resulting Waveform

15. Proof of Concept
Final product with transducer outside the enclosure for demo purpose
Final Product with populated PCB outside enclosure

16. Future Work Increase the range for the alert owner RF transmitter
Decrease size of enclosure
Increase the number of collars
More specialized battery with recharging circuit built in

17. Questions?