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[General] LED Controller using at89c2051 problem

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your1click

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Hi friends I design simple circuit and programmed and test with Proteus Simulator here it's working properly but I applied programed on IC and test on bread board its not working. here is my circuit which I upload but programmed I will update next time b'coz now I'm at office when I get my laptop I will upload it also. but please check circuit diagram and try to say something about this circuit. Click.png
 

is an internal pull-up working?
measure V at the 3 controller pins if it is low insert pull-up resistor
 

i mean 3 pins
p1.2 , P1.1 and P1.0 ( controller I/P from SW1,2&3)
 

What is the real value of the capacitor, 10u or 10m?

What is the intended purpose of the capacitor? (From the look of the schematic, it pulls pin 1 high briefly on power up.) Did you test to make sure it does its job?

Does the capacitor need to be discharged after each use? Did you add a method to achieve this?
 

So you mean I have to add pull register ??

- - - Updated - - -

that is 10u
BradtheRad said:
What is the real value of the capacitor, 10u or 10m?

What is the intended purpose of the capacitor? (From the look of the schematic, it pulls pin 1 high briefly on power up.) Did you test to make sure it does its job?

Does the capacitor need to be discharged after each use? Did you add a method to achieve this?
Click to expand...
 

Here is code for this ckt which I used please check this also

Code C - [expand]
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//For coding
//Let start our coding here
 
#include<AT89x51.h>
sbit LED1 = P1^3;
sbit LED2 = P1^4;
sbit SW1 = P1^0;
sbit SW2 = P1^1;
sbit SW3 = P1^2;
 
void main(void)
{
SW1=1;
SW2=1;
SW3=1;
        {
        if(SW1==0)
        {
        LED1 = 1;
        LED2 = 0;
        }
        {
        if(SW2==0)
        {
        LED1 = 0;
        LED2 = 1;
        }
        {
        if(SW3==0)
        {
        LED1 = 0;
        LED2 = 0;
        }
        }
        }
    }}
 
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