Week3 Analog Output

Lab1 Digital Input and Output

A force sensor controlling the frequency of the sound. The problem was that the sound is very low since it’s a big speaker. So I connected the speaker to an independent 5V power and added a MOSFET to control it. The final result is showing below. It was extremely loud.

const int speaker = 2;
const int input = A0;

void setup() {
  pinMode(input, INPUT);
}

void loop() {
  int value = analogRead(input);
  float frequency = map(value, 0, 1023, 100, 1000);

  tone(speaker, frequency);
  delay(10);
}

Lab2 Servo motor control

The Servo.h module is very easy to use.

#include <Servo.h>

Servo theServo;

void setup() {
  theServo.attach(2);
}

void loop() {
  int value = analogRead(A0);
  int angle = map(value, 0, 1023, 0, 180);
  theServo.write(angle);
  delay(10);
}

Project 1 Idea

I am thinking about making an instrument for the project 1. Basiclly, a speaker will generate different sound controlling by a bunch of analog inputs. I can also add some LED to make it looks cooler.