/*— Binary Counting with 8 bits —*/
int sensorValue = 0;        // value read from the pot
byte outputValue = 0;        // value output to the PWM (analog out)
int analogInPin=A0;
byte pins[] = {5, 6, 7, 8, 9, 10, 11, 12}; //Associate LEDs with an Arduino Digital pin.

void setup()
{
  Serial.begin(9600);
  for(int i = 0; i < 7; i++) {
    pinMode(pins[i], OUTPUT);
  }
}

void loop()
{
 // read the analog in value:
  sensorValue = analogRead(analogInPin);   
  float volt=sensorValue*5.00/1023;
  Serial.print("volt= ");      
  Serial.println(volt);   
  // map it to the range of the analog out:
  outputValue = map(sensorValue, 0, 1023, 0, 255);  
  

for(int i=0; i<8; i++) // loop through each of the values 
{ // Light up LED if its corresponding byte is equal to binary va1ue. 
digitalWrite(5, (outputValue & B1)); // -------X Decimal value 1 
digitalWrite(6, (outputValue & B10)); // ------X- Decimal value 2 
digitalWrite(7, (outputValue & B100)); // -----X-- Decimal value 4 
digitalWrite(8, (outputValue & B1000)); // ----X--- Decimal value 8 
digitalWrite(9, (outputValue & B10000)); // ---X---- Decimal value 16 
digitalWrite(10, (outputValue & B100000)); // --X----- Decimal value 32 
digitalWrite(11, (outputValue & B1000000)); // -X------ Decimal value 64 
digitalWrite(12, (outputValue & B10000000)); // X------- Decimal value 128 
delay(10); 
} 
}