106 lines
3.6 KiB
Markdown
106 lines
3.6 KiB
Markdown
# Security Alert
|
||
|
||
## Introduction @fullscreen
|
||
|
||
The Infrared Sensor uses infrared light waves to detect proximity to the robot. Build an security alert using the infrared sensor.
|
||
|
||
|
||
|
||
## Step 1
|
||
|
||
Open the ``||sensors:Sensors||`` Toolbox drawer. Drag out an ``||sensors:on infrared||`` block onto the Workspace (you can place this anywhere). Use the second drop-down menu to select ``detected``.
|
||
|
||
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
|
||
})
|
||
```
|
||
|
||
## Step 2
|
||
|
||
Open the ``||brick:Brick||`` Toolbox drawer. From the **Screen** section, drag out a ``||brick:show image||`` block onto the Workspace, and drop it into the ``||sensors:on infrared||`` block.
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.expressionsBigSmile)
|
||
})
|
||
```
|
||
|
||
## Step 3
|
||
|
||
In the ``||brick:show image||`` block, use the drop-down menu to select the **STOP** sign image.
|
||
|
||
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.informationStop1)
|
||
})
|
||
```
|
||
|
||
## Step 4
|
||
|
||
Open the ``||brick:Brick||`` Toolbox drawer. From the **Buttons** section, drag out a ``||brick:set status light||`` block onto the Workspace, and drop it after the ``||brick:show image||`` block.
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.informationStop1)
|
||
brick.setStatusLight(StatusLight.Orange)
|
||
})
|
||
```
|
||
|
||
## Step 5
|
||
|
||
In the ``||brick:set status light||`` block, use the drop-down menu to select the ``red flash`` light
|
||
|
||
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.informationStop1)
|
||
brick.setStatusLight(StatusLight.RedFlash)
|
||
})
|
||
```
|
||
|
||
## Step 6
|
||
|
||
Open the ``||loops:Loops||`` Toolbox drawer. Drag a ``||loops:repeat||`` loop onto the Workspace, and drop it after the ``||brick:set status light||`` block.
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.informationStop1)
|
||
brick.setStatusLight(StatusLight.RedFlash)
|
||
for (let i = 0; i < 4; i++) {
|
||
|
||
}
|
||
})
|
||
```
|
||
|
||
## Step 7
|
||
|
||
Open the ``||music:Music||`` Toolbox drawer. Drag a ``||music:play sound effect until done||`` block onto the Workspace, and drop it into the ``||loops:repeat||`` loop.
|
||
|
||
```blocks
|
||
sensors.infrared1.onEvent(InfraredSensorEvent.ObjectDetected, function () {
|
||
brick.showImage(images.informationStop1)
|
||
brick.setStatusLight(StatusLight.RedFlash)
|
||
for (let i = 0; i < 4; i++) {
|
||
music.playSoundEffectUntilDone(sounds.animalsCatPurr)
|
||
}
|
||
})
|
||
```
|
||
|
||
## Step 8
|
||
|
||
In the ``||music:play sound effect until done||`` block, use the drop-down menu to select ``information error alarm`` sound effect.
|
||
|
||
|
||
|
||
## Step 9
|
||
|
||
Now, plug your @boardname@ 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 an Infrared Sensor to Port 1 of your brick. Test your program by putting an object increasingly closer to the Infrared Sensor – your Intruder Alert should trigger when you get too close!
|