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More updates for 'Try' and 'Use' topix (#375)

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Galen Nickel
2018-03-22 14:16:14 -07:00
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@ -1,16 +1,17 @@
# Use
[IMG: EV3 Driving Base full w/cuboid]
Build a robot and drive into the world of robotics!
![EV3 Driving Base full w/cuboid](/static/getting-started/EV3_GettingStarted_13.jpg)
In this project we will guide you through building a Driving Base Robot and programming it to move straight and turn. You will also build and Object Detector Module, and program it to detect an object. It’s a good idea to have done the [Try](/getting-started/try) sequence first.
## Connect
[IMG: Apple Picker]
What if your school had a multipurpose robot? How would you use it?
![Apple Picker Robot](/static/getting-started/02_ApplePickerRobot.jpg)
Would you use it to clean the school or plant trees?
## Build Your Driving Base Robot
@ -21,7 +22,7 @@ Build the robot driving base:
## Make It Move
1) Create a program that makes the Driving Base move forward and stop at the finish line, which is 1 meter away.
**Code it:** Create a program that makes the Driving Base move forward and stop at the finish line, which is ``1`` meter away.
Start by building this program:
@ -31,9 +32,9 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
})
```
* Drag a ``||motors:steer large B+C motor||`` block inside the ``||brick:on button||`` block
* Click on the **(+)** sign
* Change to ``1`` rotation
* Drag a ``||motors:steer large B+C motor||`` block inside an ``||brick:on button||`` block.
* Click on the **(+)** sign.
* Change to ``1`` rotation.
### ~hint
@ -41,38 +42,38 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
### ~
2) Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
**Download:** Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
## Make It Turn
**Code it:** Create a new program that turns the Driving Base 180 degrees.
```blocks
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
motors.largeBC.steer(-50, 50, 1, MoveUnit.Rotations)
})
```
1) Create a new program that turns the Driving Base 180 degrees.
### ~hint
**Hint:** You will have to modify the turn ratio and the number of rotations until the robot reaches 180 degrees.
### ~
2) Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
**Download:** Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
## Add an Ultrasonic Sensor to Your Driving Base
[IMG: EV3 Ultrasonic Sensor Driving Base Building Instructions Main Image]
Build and attach an Ultrasonic Sensor to your driving base:
* [building instructions](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/building-instructions/ev3-ultrasonic-sensor-driving-base-61ffdfa461aee2470b8ddbeab16e2070.pdf)
[![EV3 Ultrasonic Sensor Driving Base Building Instructions Main Image](/static/lessons/common/ev3-ultrasonic-sensor-driving-base.jpg)](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/building-instructions/ev3-ultrasonic-sensor-driving-base-61ffdfa461aee2470b8ddbeab16e2070.pdf)
## Detect an Object
1) Create a program that moves the Driving Base and makes it stop ``6`` cm from the Cuboid.
**Code it:** Create a program that moves the Driving Base and makes it stop ``6`` cm from the Cuboid.
Create a new program:
Create a new program
```blocks
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
motors.largeBC.tank(50, 50)
@ -82,10 +83,10 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
})
```
* Drag a ``||motors:tank large B+C||`` motor block inside the on button block
* Drag the Ultrasonic Sensor threshold ``||sensors:set ultrasonic 4||`` block and place it below the motor block
* Drag a ``|sensors:pause until ultrasonic 4||`` block and place it under the threshold block
* Drag a ``||motors:stop all motors||`` block and place it below the sensor block
* Drag a ``||motors:tank large B+C||`` motor block inside the ``||brick:on button||`` block.
* Drag the Ultrasonic Sensor threshold ``||sensors:set ultrasonic 4||`` block and place it below the motor block.
* Drag a ``|sensors:pause until ultrasonic 4||`` block and place it under the threshold block.
* Drag a ``||motors:stop all motors||`` block and place it below the sensor block.
### ~hint
@ -93,7 +94,7 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
### ~
2) Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
**Download:** Click **Download** and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
Click on the **JavaScript** tab. Change and test the number value of the Ultrasonic
Sensor.
@ -105,4 +106,4 @@ sensors.ultrasonic4.setThreshold(UltrasonicSensorEvent.ObjectDetected, 10)
**Congratulations!**
You are ready to move on to the next steps.
Try a LEGO MINDSTORMS Design Engineering, Coding, or Maker activity.
Try a LEGO MINDSTORMS [Design Engineering](/design-engineering), [Coding](/coding), or [Maker](/maker) activity.