Technology 4 ESO – Unit 5 CONTROL AND ROBOTICS page 58 activity 6
a) In this link: http://en.wikipedia.org/wiki/List_of_sensors we can find information about sensors.
Choose a sensor that you like and write a summary about what we use it for and how it works.
b) Watch the video on “How do touchscreens work?” and answer:
- I) What is “indium tin oxide”?
- II) Why we can’t see the double grid of electrodes under the screen?
- III) What happens to the electrons in our finger when we touch the screen?
- IV) What are the two criteria for materials to make the screen function when they touch it?
- V) What electronic components make the circuit connected to the meters in our touch screen?
- VI) What numbers refer to the “high voltage” and to the “low voltage”?
- VII) What is the binary code for the “poop emoji”?
- VIII) What is “Unicode”?