CATAPULT

lEARNING gOALS

Program micro:bit to control a servo motor.
Use input buttons A and B as event trigger.
Use servo motor to adjust the degrees of firing angle to launch a projectile.

buILDING INSTRUCTIONS

Blocks in use

ON BUTTON PRESSED

Program under this block will only run when the button is pressed.

SERVO(180) BLOCK

Control which Servo Motor's port to use and degrees of movement. Maximum to 180 degrees.

SERVO(270) BLOCK

Control which Servo Motor's port to use and degrees of movement. Maximum to 270 degrees.

sample code of servo motor:

Moving servo motor from 0 degree to 30 degrees

CODING

Sample code

makecode.microbit.org/_F3xcof2aCeM7

STEM CORNER

Servo Motor

Servo motor is a rotary actuator that allows precise control of angular position.

Some servo motors use position-only sensing via a potentiometer and bang-bang control of their motor. The servo motor always rotates at full speed.

Buttons

Button is a simple switch mechanism to control some process.

Buttons are typically made out of hard material, usually plastic or metal.The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed.

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