Individual Assignment:

   Add an output device to a micro-controller board you've

   designed,and program it to do something

  Group assignment:

   Measure the power consumption of an output device my

   contribution in this is to measuring values

   Group work link

key learning from this Week

1 Understanding output devices

2 Controlling motor from a program code

Files for this Week

1 eagle schematic and board file

2 PNG file for tracing , drilling and cutting

3 program code

 

In this board the green pads are for through hole component, i have connected motor for output which is to be connected at jp1 pin header ,i connect 5.5 v voltage regulator so it will supply power to all other component in circuit which are operated at 5.5 v 0r less than that .

For connecting 12v dc motor with board you need h bridge made of two mosfet or you may use IC l293d which i used in my circuit for connection you may refer pin-out diagram for this , with one ic you can connects 2 Motors with your board one each side of this ,  connect pin 2 and pin 7 of ic  to board pin ( i/o pins) and PWM Input i.e Pin 1 to 5v and Pin 3 and pin 7 output pin of l293d to motor header , i used only one motor so i connect every thing on one side for another motor connect things in the similar way ,this thing better explained in diagram

Here i use Arduino for programing my board this 10, 11, 12 ,13 are pin on arduino board are programing pins and the pins of  6 pin header are in same order as shown in diagram connect respective pins having same name.

i have given 2 pin pinhole header for connecting motor at back side of my board as shown in image for testing this i have taken power from arduino board as my motor will run at  5v also

 

int ledPin = 5;

int ldrPin = 0;

void setup () {

pinMode(ledPin, OUTPUT);

pinMode(7, OUTPUT);

pinMode(6, OUTPUT);

pinMode(ldrPin, INPUT);}

void loop() {

int  ldrStatus = analogRead(ldrPin);

if (ldrStatus <= 600) {

digitalWrite(ledPin, HIGH);

digitalWrite(6, HIGH);

digitalWrite(7, LOW );

}

else {

digitalWrite(6, LOW);

digitalWrite(7, LOW);

digitalWrite(ledPin, LOW);

 

}

 

}

 

 

// i used for initializing  ledpin to in pin number 5

// i used for initializing  ldrpin to pin number 0

// it is a function which we use for assigning pin to output / input as this will tell

   controller that at what pin you are using input and output

//   this are for assigning input and output to pin

// this is function in which we write code for what your program will do

// we initialize a variable ldrstatus which will save value on ldrpin

 

 

// we check this value if less than 600 the code in if loop will execute otherwise it

   directly jump to else condition

// 6 and 7 are motor pin for running motor you need to assign one pin high and one pin low

 

// when both pin are low your motor will stop

 

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