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Incremental update to 'try' and 'use' topics (#374)

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Galen Nickel
2018-03-21 12:36:49 -07:00
committed by Peli de Halleux
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docs/getting-started/use.md
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@ -3,7 +3,7 @@
[IMG: EV3 Driving Base full w/cuboid]
Build a robot and drive into the world of robotics!
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.
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
@ -15,14 +15,12 @@ Would you use it to clean the school or plant trees?
## Build Your Driving Base Robot
[IMG: EV3 Driving Base Building Instructions Cover Image]
Build the robot driving base:
* [Building instructions](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/building-instructions/ev3-rem-driving-base-79bebfc16bd491186ea9c9069842155e.pdf)
[![EV3 Driving Base](/static/lessons/common/ev3-driving-base.jpg)](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/building-instructions/ev3-rem-driving-base-79bebfc16bd491186ea9c9069842155e.pdf)
## Make It Move
[IMG: Program Blocks (see JavaScript below)]
1) 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:
@ -33,22 +31,20 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
})
```
* Drag a steer large B+C motor block inside the on button block
* Click on the + sign
* Change to 1 rotation
* Drag a ``||motors:steer large B+C motor||`` block inside the ``||brick:on button||`` block
* Click on the **(+)** sign
* Change to ``1`` rotation
### ~ hint
### ~hint
Hint: You will have to modify the number of rotations until you find the number that matches the robot moving forward 1 meter and stopping.
**Hint:** You will have to modify the number of rotations until you find the number that matches the robot moving forward 1 meter and stopping.
### ~
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.
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.
## Make It Turn
[IMG: Program Blocks (see JavaScript below)]
```blocks
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
motors.largeBC.steer(-50, 50, 1, MoveUnit.Rotations)
@ -57,14 +53,14 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
1) Create a new program that turns the Driving Base 180 degrees.
### ~ hint
### ~hint
Hint: You will have to modify the turn ratio and the number of rotations until the robot reaches 180 degrees.
**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.
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.
## Add an Ultrasonic Sensor to Your Driving Base
@ -74,9 +70,7 @@ Hint: You will have to modify the turn ratio and the number of rotations until t
## Detect an Object
[IMG: Program Blocks (see JavaScript below)]
1 - Create a program that moves the Driving Base and makes it stop ``6`` cm from the Cuboid.
1) Create a program that moves the Driving Base and makes it stop ``6`` cm from the Cuboid.
Create a new program
```blocks
@ -88,26 +82,26 @@ brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
})
```
* Drag a tank large B+C motor block inside the on button block
* Drag a threshold Ultrasonic Sensor block and place below the motor block
* Drag a stop all motors block and place it below the sensor block
* 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
### ~ hint
### ~hint
Hint: You will have to modify the values of the Ultrasonic Sensor block until the robot reaches the desired position.
**Hint:** You will have to modify the values of the Ultrasonic Sensor block until the robot reaches the desired position.
### ~
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.
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.
Click on the JavaScript tab and change and test the number value of the Ultrasonic Sensor
Click on the **JavaScript** tab. Change and test the number value of the Ultrasonic
Sensor.
```typescript
sensors.ultrasonic4.setThreshold(UltrasonicSensorEvent.ObjectDetected, 10)
```
[IMG: EV3 Ultrasonic Sensor Driving Base Building Instructions Main Image]
**Congratulations!**
You are ready to move on to the next steps.