def setValue(self,value):
		for i in range(24):
			bitwise=0x800000>>i
			bit=bitwise&value
			if (bit==0):
				gpio.output(Shifter.DN,gpio.LOW)
			else:
				gpio.output(Shifter.DN,gpio.HIGH)
			gpio.output(Shifter.CLK,gpio.HIGH)
			sleep(self.pause)
			gpio.output(Shifter.CLK,gpio.LOW)
			sleep(self.pause)

 >>> x = "0bf" + "ff" + "bf" 
>>> int(x, 16)
12582847