Input Devices

• Add an output device to a microcontroller board you have designed and program it to do something

Board Designing

I have decided to design a the Input and Output circut in one board. I chosed the Ultrasonic Sensor "HC-SR04" as Input to be used in measuring the distance and "RGB Led" as Output for emmiting beautiful colors.

First I started form Niel's boards hello.HC-SR04 and hello.RGB.45 , and I used Eagle to combine them

Machining and Soldering

Programming

This week I am focusing on the Input part. First I connected the Ultrasonic sensor to the board using four jumper wires and a breadboard then I used Arduno sketch to write program that calculate the distance, and print it on the screen

                #include < SoftwareSerial.h >
                SoftwareSerial mySerial (0,2);

                int trig = 3;
                int echo = 4;
                long duration, distance ;

                void setup() {
                  mySerial.begin(9600);
                  pinMode(trig, OUTPUT);
                  pinMode(echo, INPUT);
                  }
                void loop() {
                  digitalWrite(trig, LOW);
                  delayMicroseconds(2);
                  digitalWrite(trig, HIGH);
                  delayMicroseconds(10);
                  digitalWrite(trig, LOW);
                  duration = pulseIn(echo,HIGH);
                  distance = duration / 58;
                  mySerial.print("The Distance is: ");
                  mySerial.println(distance);
                  delay(100);
                }



              

• Board files : Download