Week  7# - Journal

The Code plan is :

to first depend on a switch ,
if this switch is connected so The Buzzer Works with the first tone and red LED is lit up
if the switch is not connected the it heads to the sensor of ultra sonic to work in the condition of the sensor , we previously set the sensor that it gives response when the reading is in a range of 40 cm So when there is a body in the range of 40 cm buzzer works with a tune that's different from the first tune in the duration and power and a green LED is lit up 

And if a body or something is in a range of more than 40 cm nothing happens no LED is lit up and no buzzer works .

Starting of coding phase

First I start with defining the the variables I'm going to use as pins numbers 

I add two other variables that I'll need in Ultra sonic sensor calculations

With the setup section in the code I do the set up for thee pins i gave them variables earlier and set them as output pins & input pins

For the switch I make the input type input_pullup to use values High/Low reversed for the switch when it's in the circuit because the inner resistance in the Arduino that it will use when we use pullup

I set the speed that the encoder will use in encoding with serial.begin

I now head to the Infinity loop section where I put the commands that are going to be repeated all the time

I now head to 

I set the ultra sonic equations that will calculate the distance between the sensor and the object using the 2 variables that I set earlier.

and also we set a delay for the code repeat

When the If case doesn't take place we head to the other condition where the ELSE IF condition code is & we make the code for ultra sonic when the body is in range of 40 Cm A Buzzer plays a specific tone and a green LED is lit up so we set the code that is responsible for that

We set the code for the case that the project is off when the switch is off for the manual mode and ultra sonic is out of range so automatic mode is off , and the code is for the Buzzer to be off so are the LEDs

We set a short time delay at the end of the code for the repeat process to be smoother.

Wiring and circuit building phase