73 lines
1.5 KiB
Markdown
73 lines
1.5 KiB
Markdown
# Code
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## @description code to make the Milk Carton Robot alive
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## ~avatar avatar
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Add code to make the Milk Carton Robot move.
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## ~
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## Duration: ~15 minutes
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## Step 1: wire up the servo
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Follow the instructions in [servo 101 manual](/device/servo) to connect the servo to the @boardname@.
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https://youtu.be/m-HS8OyS0pw
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## Step 2: code light sensor
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Code the lightsensor on the @boardname@ to control the servo.
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```blocks
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basic.forever(() => {
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led.plotBarGraph(
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input.lightLevel(),
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0
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)
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pins.servoWritePin(AnalogPin.P0, input.lightLevel())
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})
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```
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https://youtu.be/Ah4fEbJtklU
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It works but your servo might be trying to move too much. Let's calibrate it.
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## Step 3: calibrate the servo
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Download the [servo calibration program](/examples/servo-calibrator) to determine
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to opening and closing angles of the servo for your robot.
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https://youtu.be/lZxWC82HDn0
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We are going to map the light level range, ``[0, 255]`` to the
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angle range, ``[closed, opened]`` using ``pins.map``.
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```blocks
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let angle = 0
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let closed = 0
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let opened = 0
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basic.forever(() => {
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led.plotBarGraph(
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input.lightLevel(),
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0
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)
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angle = pins.map(
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input.lightLevel(),
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0,
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255,
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opened,
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closed
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)
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pins.servoWritePin(AnalogPin.P0, angle)
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})
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// TODO: use the angle found at calibration!
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opened = 95
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// TODO: use the angle found at calibration!
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closed = 175
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```
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## ~button /projects/milk-carton-robot/connect
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NEXT: Connect
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## ~ |