You can use a philips screw driver to attach the rotor to the servo.
Code
Duration: ~30 minutes
Step 1: Calibrate servo
In order for the Milky Monster to move, the micro:bit needs to command the servo to go between 0
and 180
degrees at a certain pace. In the code below:
- Press button
A
to switch the servo to 180 degrees (to close the mouth of Milky Monster). - Press button
B
to switch the servo to 0 degrees (to open the mouth of Milky Monster).
input.onButtonPressed(Button.A, function () {
pins.servoWritePin(AnalogPin.P0, 180)
basic.showNumber(180)
})
input.onButtonPressed(Button.B, function () {
pins.servoWritePin(AnalogPin.P0, 0)
basic.showNumber(0)
})
basic.showString("calibrate")
Step 2: Attach rotor
The servo should be positioned at 180 degrees before attaching the rotor to it. This will make sure the mouth of the Milky Monster is closed once the servo reaches 180 degrees.
Step 3: Check calibration
When the user presses A
the servo rotor should be in ‘up’ position.
Step 4: Connect cord to rotor
Connect the cord to the servo rotor while mouth of Milky Monster is closed.
Step 5: Connect cables to micro:bit
Connect cables from micro:bit to the servo and place the battery.
Step 6: Code light sensor
Code the light sensor on the micro:bit to control the servo.
basic.forever(function () {
pins.servoWritePin(AnalogPin.P0, input.lightLevel())
led.plotBarGraph(
input.lightLevel(),
0
)
})
Step 7: Ready!
Your Milky Monster is ready!
NEXT: Connect