RC car lesson (#519)
* initial drop * fixing summary * adding images * Adding basic connect code * connect section * moving video * adding ignores
This commit is contained in:
Peli de Halleux
GitHub
72
docs/projects/rc-car/code.md
Normal file
72
docs/projects/rc-car/code.md
Normal file
@ -0,0 +1,72 @@
|
||||
# Code
|
||||
|
||||
## Step 1: Add the Kitronik package
|
||||
|
||||
Kitronik published a set of blocks to use their motor driver. We need to add it to our project.
|
||||
|
||||
* Click on **Advanced**
|
||||
* Click **Add Package**
|
||||
* Type ``kitronik``, press **Enter**
|
||||
* Select the **kitronik-motor-driver** package
|
||||
|
||||
After the package gets loaded, you should see a new **Kitronik" category in the toolbox.
|
||||
|
||||
## Step 2: Round and round we go!
|
||||
|
||||
https://youtu.be/pD6tM1nXCPA
|
||||
|
||||
The first program will have the car drive in a circle for 5 seconds when the user presses button ``A``.
|
||||
This is simply done by turning both motor controllers on for 5 seconds.
|
||||
|
||||
```blocks-ignore
|
||||
input.onButtonPressed(Button.A, () => {
|
||||
basic.showIcon(IconNames.Happy)
|
||||
kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Reverse, 100)
|
||||
kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Forward, 100)
|
||||
basic.pause(5000)
|
||||
kitronik.motorOff(kitronik.Motors.Motor1)
|
||||
kitronik.motorOff(kitronik.Motors.Motor2)
|
||||
basic.showIcon(IconNames.SmallDiamond)
|
||||
})
|
||||
```
|
||||
|
||||
### ~ hint
|
||||
|
||||
Make sure to unplug the @boardname@ from the Edge connector while your are connecting it to your computer to avoid any kind of electrical problem.
|
||||
|
||||
### ~
|
||||
|
||||
Depending on how you've connected your cables to the motor driver, your car may be going backward instead of forward.
|
||||
You can either swap the cables or change your code to account for that.
|
||||
|
||||
## Step 3: Figure Eight
|
||||
|
||||
https://youtu.be/agor9wtiAkE
|
||||
|
||||
Instead of stopping after 5 seconds, we reverse the steering motor to turn the other direction. This will create a figure eight trajectory.
|
||||
|
||||
```blocks-ignore
|
||||
input.onButtonPressed(Button.A, () => {
|
||||
basic.showIcon(IconNames.Happy)
|
||||
kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Reverse, 100)
|
||||
kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Forward, 100)
|
||||
basic.pause(3500)
|
||||
kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Reverse, 100)
|
||||
basic.pause(3500)
|
||||
kitronik.motorOff(kitronik.Motors.Motor1)
|
||||
kitronik.motorOff(kitronik.Motors.Motor2)
|
||||
basic.showIcon(IconNames.SmallDiamond)
|
||||
})
|
||||
```
|
||||
|
||||
Great! It's now time to use another @boardname@ to remove control the car.
|
||||
|
||||
### ~button /projects/rc-car/connect
|
||||
|
||||
Connect
|
||||
|
||||
### ~
|
||||
|
||||
```package
|
||||
pxt-kitronik-motor-driver=github:kitronikltd/pxt-kitronik-motor-driver#v0.0.3
|
||||
```
|
||||
54
docs/projects/rc-car/connect.md
Normal file
54
docs/projects/rc-car/connect.md
Normal file
@ -0,0 +1,54 @@
|
||||
# Connect
|
||||
|
||||
|
||||
https://youtu.be/XXesoUC0XBU
|
||||
|
||||
We are going to use radio to remote control the toy car.
|
||||
A second @microbit@ will send commands to control the throttle and the steering.
|
||||
|
||||
```blocks-ignore
|
||||
let steering = 0
|
||||
let throttle = 0
|
||||
radio.onDataPacketReceived( ({ receivedString: name, receivedNumber: value }) => {
|
||||
led.toggle(0, 0)
|
||||
if (name == "throttle") {
|
||||
if (value > 0) {
|
||||
kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Reverse, 100);
|
||||
} else if (value < 0) {
|
||||
kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Forward, 100);
|
||||
} else {
|
||||
kitronik.motorOff(kitronik.Motors.Motor1);
|
||||
}
|
||||
} else if (name == "steering") {
|
||||
if (value > 0) {
|
||||
kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Forward, 100);
|
||||
} else if (value < 0) {
|
||||
kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Reverse, 100);
|
||||
} else {
|
||||
kitronik.motorOff(kitronik.Motors.Motor2);
|
||||
}
|
||||
}
|
||||
})
|
||||
basic.forever(() => {
|
||||
throttle = 0
|
||||
if (input.buttonIsPressed(Button.A)) {
|
||||
throttle = 100
|
||||
} else if (input.buttonIsPressed(Button.B)) {
|
||||
throttle = -100
|
||||
}
|
||||
radio.sendValue("throttle", throttle)
|
||||
steering = 0
|
||||
if (input.acceleration(Dimension.X) < -512) {
|
||||
steering = -100
|
||||
} else if (input.acceleration(Dimension.X) > 512) {
|
||||
steering = 100
|
||||
}
|
||||
radio.sendValue("steering", steering)
|
||||
})
|
||||
radio.setGroup(12)
|
||||
```
|
||||
|
||||
```package
|
||||
radio
|
||||
pxt-kitronik-motor-driver=github:kitronikltd/pxt-kitronik-motor-driver#v0.0.3
|
||||
```
|
||||
76
docs/projects/rc-car/make.md
Normal file
76
docs/projects/rc-car/make.md
Normal file
@ -0,0 +1,76 @@
|
||||
# Make
|
||||
|
||||
### @description Hacking the car electronics
|
||||
|
||||
### ~avatar avatar
|
||||
|
||||
Hack the @boardname@ into the car!
|
||||
|
||||
### ~
|
||||
|
||||
https://youtu.be/gH__3l_oDeM
|
||||
|
||||
## Materials
|
||||
|
||||
* a toy RC car with 4 or 6 AA batteries
|
||||
* a cable trimmer
|
||||
* small Philips screw driver
|
||||
|
||||
|
||||
|
||||
## Step 1: Remove the batteries!
|
||||
|
||||
Make sure all the batteries are removed from the toy car!
|
||||
|
||||
## Step 2: Remove the cover
|
||||
|
||||
Remove the various protective covers until you have access to the electronic controller. Make sure to keep track of all the screws you remove,
|
||||
you will need them again!
|
||||
|
||||
## Step 3: Cut out the electronic board
|
||||
|
||||
Follow the motor and power cables and cut the wires as close as possible from the electronic board. You should end up with a total of 8 cables:
|
||||
2 for power, 2 for the steering motor and 2 pairs for the torque motors.
|
||||
|
||||
|
||||
|
||||
## Step 4: Prepare the cables
|
||||
|
||||
Using the wire trimmer, expose 1/4 inch (1/2 cm) of metal on each wire so you can attach it to the motor driver.
|
||||
|
||||
|
||||
|
||||
## Step 5: Connect the battery cables
|
||||
|
||||
* Connect the cables from the battery section to the power input on the motor shield.
|
||||
Make sure the **+** cable goes into the **+** port!
|
||||
* Connect both torque motors to the **motor 1** connector in the motor driver.
|
||||
Make sure to connect the cables of same colors so that your wheel turn the same direction!
|
||||
* Connect the remaining motor cables to the **motor 2** connector.
|
||||
|
||||
|
||||
|
||||
## Step 6: Slot in the @boardname@
|
||||
|
||||
Probably the easiest step, insert the @boardname@ in the edge connector until clips in.
|
||||
|
||||
## (Optional) Step 7: Cut out a slot in the cover to fit the @boardname@
|
||||
|
||||
Depending on your car size, you may be able to fit back the decoration top back on the car.
|
||||
Otherwise, get some cardboard, scissors and a glue gun to rebuild it yourself!
|
||||
|
||||
|
||||
|
||||
## (Optional) Step 8: Paint job
|
||||
|
||||
Once you have replaced the cover (original or carboard), decorate it to your taste!
|
||||
|
||||
|
||||
|
||||
That's it, it's time to code!
|
||||
|
||||
### ~button /projects/rc-car/code
|
||||
|
||||
Code
|
||||
|
||||
### ~
|
||||
Reference in New Issue
Block a user