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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by vinash[/i] [br]Hi, I am a new comer to the field of microcontrollers and doing some simple projects to get familiar with microcontrollers. Currently i am embarking on using the AT89C4051 as an ADC . I am actually trying to use the application notes provided by the following website: h**p://www.atmel.com/dyn/resources/prod_documents/DOC0524.PDF It would be very useful if someone were to help me with the coding (C-program) for the application. I have tried a few times but have failed. Your help would be greaatly appreciated. I have done the conections for the ADC conversion and had connected the positive voltage of the signal to Pin 1.1. and i wrote a very simple program, that would be able to output voltage reading on the LEDs,. The program is of as follows: #include<AT89x051.h> char a[10]={0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x73,0x83,0x93}; /* The numbering from 0-9*/ void main(void) {int j, adc_data; while(1){ P1_1=adc_data; P1=a[adc_data%10]; for(j=0;j<30000;j++); } } I do always get a zero on my LED display, no matter how i changed the voltage input, Could someone please help.I am struggling with this for a few days. Thank you [/quote]    Insert an Image File Check here to include your profile signature.