Page 96 - KEC Khaitan C5 Flipbook
P. 96
SENSORS AND APP CHAPTER
FUNCTIONALITY B3
learning outcomes
The student will be able to:
understand how sensors enhance app functionality by collecting environmental data.
identify different sensors and their everyday applications.
design and develop a Pedometer App using MIT App Inventor.
program the app to start, stop, and reset step counts accurately.
debug and fix common issues to ensure smooth app performance.
Sensors help phones and devices feel and understand the world around them, like
movement, light, and location. They make apps fun and useful, like helping in games,
maps, and fitness tracking. In this chapter, we will learn about different sensors and
create a Pedometer App to count steps using the Pedometer Sensor.
SENSOR
A sensor is a component that helps an app interact with the physical environment by
detecting motion, location, sound, and other data from the device. Sensors can be found
in the Sensors category in the Palette.
TYPES OF SENSORS AND THEIR APPLICATIONS
There are many different types of sensors that help devices detect and respond to changes
in their surroundings.
1. Accelerometer Sensor
An accelerometer sensor is like a tiny helper inside your phone that feels when the phone
moves, shakes, or tilts. Used in gaming apps to control characters by tilting the phone, in
fitness apps to track movement, and in security apps to detect phone drops or theft.
2. Barcode Scanner
A barcode scanner is like a magic eye in your phone that can read secret codes on
objects. Used in shopping apps to scan product barcodes, library apps for book check-ins,
and payment apps to scan QR codes for transactions.
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