Using Touch Sensor Values

Introduction

Use the Touch Sensor value to stop a running motor.

Step 1

Open the ||brick:Brick|| Toolbox drawer. Drag an ||brick:on button|| block onto the Workspace, and place it anywhere.

brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {

})

Step 2

Open the ||motors:Motors|| Toolbox drawer. Drag out a ||motors:run|| block onto the Workspace, and drop it into the ||brick:on button|| block.

brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
    motors.largeA.run(50)
})

Step 3

Open the ||logic:Logic|| Toolbox drawer. Drag out an ||logic:if then|| block onto the Workspace, and drop it into the ||loops:forever|| block.

forever(function () {
    if (true) {

    }
})

Step 4

Open the ||sensors:Sensors|| Toolbox drawer. Drag out a ||sensors:touch is pressed|| block onto the Workspace, and drop it in the ||logic:if then|| block replacing true.

forever(function () {
    if (sensors.touch1.isPressed()) {

    }
})

Step 5

Open the ||music:Music|| Toolbox drawer. Drag out a ||music:play sound effect|| block onto the Workspace, and drop it under the ||logic:if then|| block.

forever(function () {
    if (sensors.touch1.isPressed()) {
        music.playSoundEffect(sounds.animalsCatPurr)
    }
})

Step 6

In the ||music:play sound effect|| block, use the drop-down menu to select the information touch sound effect.

forever(function () {
    if (sensors.touch1.isPressed()) {
        music.playSoundEffect(sounds.informationTouch)
    }
})

Step 7

Open the ||motors:Motors|| Toolbox drawer. Drag out a ||motors:stop|| block onto the Workspace, and drop it in after the ||music:play sound effect|| block.

forever(function () {
    if (sensors.touch1.isPressed()) {
        music.playSoundEffect(sounds.informationTouch)
        motors.largeA.stop()
    }
})

Step 8

Now, plug your EV3 Brick into the computer with the USB cable, and click the Download button at the bottom of your screen. Follow the directions to save your program to the brick.

Attach a Large motor to Port A, and a Touch sensor to Port 1 on your brick. Test your program by pressing the ENTER button. When the motor starts, press the touch sensor. Does the motor stop as expected?