For the second demo, I wanted to create a small pinball machine with two switches to control two servos that act as “flaps”

Brainstorming

For brainstorming, I drew what I visualized for the project, and estimated the dimensions.

After visualizing the “pinball machine”, I CADed the files on Solidworks. Below are the files for the parts and assembly files.

PinballDownload

Implementation

After lasercutting the individual pieces, I spent an hour filing the holes in the top, as I underestimated the size of the servos. I then glued all the parts together and screwed the servos into the top.

Pinball structure with 30 degree angle

I then built the circuit for the servos and the switches for each servo.

The two switches are on the breadboard.

The circuit board, servos, and the structure together created this result:

Obviously, the ball did not travel as well up as I wanted it to go. This was partially due to the steep angle of the structure and also due to the lack of speed of the servos. In the future, I would want to make the structure have a less steep incline.

Code

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#include <Servo.h&gt;
const int buttonPin1 = 11;     // the number of the pushbutton pin
const int buttonPin2 = 12;     // the number of the pushbutton pin
 
 
// variables will change:
int buttonState1 = 0;         // variable for reading the pushbutton status
int buttonState2 = 0;         // variable for reading the pushbutton status
 
Servo servo1;
Servo servo2;
 
void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin1, INPUT);
  pinMode(buttonPin2,INPUT);
  servo1.attach(9);
  servo2.attach(10);
}
 
void loop() {
  // read the state of the pushbutton value:
  buttonState1 = digitalRead(buttonPin1);
  buttonState2 = digitalRead(buttonPin2);
 
  if (buttonState1 == HIGH) {
    servo1.write(150);
  } else {
    // turn LED off:
    servo1.write(80);
  }
  if (buttonState2 == HIGH){
    servo2.write(110);
  }
  else{
    servo2.write(180);
  }
  }