hello i have made circuit of

[amjadhussain]

hello

 

i have made circuit of interfacing of ADC0808 with 89c51given on

 

http://www.engineersgarage.com/microcontroller/8051projects/interface-ADC0808-using-clock-AT89C51-circuit

 

 

it is giving showing all leds off(i.e all ports connected to these leds are red) except which is connected at pin 28(it is showing blue ) of mc,so according to given pattern all leds are off except cpnnected at 28 pin of mc this pattern is not effected by varying the resistance (sensor) connected at pin 27 of ADC0808,i could not understand the problem,

 

please help me in this regard,guid me about the circuit i.e which kind of output it gives and how it is effected by change in resitance connected at pin 27 of ADC

 

please help me by providing the guidance,

 

i am  expecting usual kind response from u

 

 

regards

 

mjd hussain