I have a digital output which I am using to drive the relays through ULN2003. 82C55 is used in the digital output board with a pull up resistor of 10K Ohm. I am facing the problem that as soon as i turn on the digital board the output lines are pulled high and this in turn is driving my relays, so i am thinking of a solution to have a pull down resistor at the digital output pin of my board so that the digital output lines be pulled low on power up. Can I use the pull down resistor in this application and if yes what value i should use??