App Inventor 2

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LEGO EV3 Color Search

This tutorial shows you how to build a mobile app that instructs an EV3 LEGO robot to search for a certain color on a white surface bordered by black. The user can pick one color out of red, green, blue, or yellow for the robot to search. The robot will search across the white surface and turn around if it gets to the black border. Here is a demonstration video.

Lego EV3 Pet Robot

This tutorial helps you to build an app that allows the user to instruct an EV3 LEGO robot to do certain maneuvers and actions through voice commands. The user can pick one of several commands: forward, backward (reverse), stop, forward slow, forward fast, disconnect, circles, right turn (turn right), left turn (turn left). The robot will follow the user’s voice commands and perform the action for half a second before prompting the user for another command. If the user provides no commands, the previous command will be executed until another command is registered.

QuizMe for App Inventor 2

QuizMe is a trivia game about baseball, but you can use it as a template to build quizzes on any topic. This tutorial is especially useful for learning about working with information in Lists. Lists are useful data structures for keeping track of many items of the same type, especially when you want to cycle through those items.

Exploring with Location Sensor in AI2

The location sensor object is used to communicate with the global positioning satellite receiver (GPS) in your phone/tablet. When the LocationSensor communicates with the built-in GPS receiver, the GPS can determine the location of your device.  The sensor can also work with network/wifi location services.  Finding a location using the network uses very different techniques to determine a location. Location means, the device's present latitude and longitude or it can mean your street address.

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