Assignment 3: ADC

MAKE PROGRAMS:

1. GLOW LED ACCORDING TO  INPUT TO ADC

    0-99       1 LED

100-150      2LED

151-200      3 LED

200-255      4LED

2.  MAKE  DIGITAL VOLTMETER 

3.  MAKE DIGITAL WATTMETER

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learn how to set up adc in cvavr

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led glow using adc:

int a;
char c[5];
DDRB=255;                   //making output port for led glow
while (1)
      {
      a=read_adc(0);                 //1st pin of port A for ADC input
      itoa(a,c);
      if(a<=99){PINB.0=1;}
      if(a<=150 && a>=100){PINB.0=1;PINB.1=1;}
   
      if(a<=200 && a>=151){PINB.0=1;PINB.1=1;PINB.2=1;}
      if(a<=255 && a>=201){PINB.0=1;PINB.1=1;PINB.2=1;PINB.3=1;}
      }

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voltmeter using adc:

configure new project in cvavr with adc and lcd both..lcd interfaced with port other than A

float v;
int a;
char c[5];

while (1)

      {

      a=read_adc(0);                 //1st pin of port A for ADC input

      

      v=5*a/255;                           //coverts input at A.0 to voltage

      itoa(v,c);                              //voltage stored in v

      lcd_clear();

      lcd_puts(c);                    //display c

      }

      

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wattmeter using adc:

      

configure new project in cvavr with adc and lcd both..lcd interfaced with port other than A

float v;
int a;
char c[5];

while (1)

      {

      a=read_adc(0);                 //1st pin of port A for ADC input

      

      v=5*a/255;                           //coverts input at A.0 to voltage

      v=v*.5;                     //  *****

      itoa(v,c);                              //voltage stored in v

      lcd_clear();

      lcd_puts(c);                    //display c

      }

      

*****multiply with current in the circuit because power=v*i

note:- if you are using 7805 voltage regulator , its output current is 0.5 ampere.

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circuit for adc on proteus ; apply different voltage on port A.0 pin