02-16-2015 10:06 AM
Does the circuit attached look ok? I require 300mA to drive the pump
02-16-2015 10:29 AM
02-16-2015 10:36 AM
Your relay isn't controlling anything. I think what you want to do here is put one side of the relay to +12V and the other side to the +V of the pump. I also think the common of the ULN2003A should be connected to your GND (coil is controlled with 12V and GND).
02-16-2015 02:20 PM
02-16-2015 02:45 PM