User:MonikaSumauskaite

Contact

Monika Sumauskaite

0975660@hr.nl

Graphic Design

Project 2

CalmCat

by Monika Sumauskaite, Vilius Vaura, Sol Chadwick




A jacket created to calm down a stressed-out cat. When the cat, wearing this jacket, meows anxiously or an increase of a heartbeat is detected, straps tightness and applies gentle pressure on the belly of the cat, stimulating specific acupressure points, that are proven to have calming effects.

Acupressure points



It is known that acupressure techniques can help to relax and overcome stress in humans and animals, like cats. There are multiple bumps on the inside of the jacket to stimulate those points when the cat is stressed. [1][2]

Sound/Heartbeat activation



The tightening of the jacket could be activated in a few different ways. The technology could use sound/voice recognition, that would be able to distinguish a stressful meow.
Or a heartbeat sensor could be used. Normal cats pulse varies from 140 to 220 beats per minute. An integrated heartbeat sensor would detect its rise and activate the straps.

Self lacing/tightening technology



The Calm Cat jacked would include a self-tightening, “cat activated” straps. The technology could work on similar principles as Nikes or Back to the Futures self-lacing shoes.

Project 3

Optical Mouse dissection

Optical Mouse is a fully electronic device used to control a cursor, select things, navigate and scroll through the screen of a computer. It uses LED light to illuminate the surface for the optical sensor (photocell) to scan the surface, in order to detect and register movement of your hand and transmits it to a computer.

1. Optical Mouse



2. Top and bottom cases.
3. View without top case


4. Mouse chip

1. A microswitch (button). Works as left and right mouse clicks.
2. Scroll wheel mount and button that works as wheel central click. The wheel detects rotation and works as a rotary switch (rotary encoder) to connect and disconnect electric signals.
3. USB connection — powers the mouse and sends digital signals to the computer.
4. Photocell or optical light sensor, that scans the surface and detects movement.
5. LED light, that shines on the surface, for the sensor to see it better.


5. Optical sensor and LED
6. Plastic prism and lens

The most important part of the mouse if the optical sensor – light detecting chip and the LED light. The LED light shines (brighter when moved) through the plastic prism, that directs the light to the surface of a desktop. The optical sensor then scans the surface and detects movement in X and Y axes. It takes multiple pictures one after another and determines how far the mouse was moved. The camera has a resolution of 18 × 18 pixel array of monochromatic pixels.
datasheet to a particular sensor in this mouse: [3]