Hi, we are trying to use a LED (from a car alarm) to trigger a relay. My guess is that the LED will operate around ~10mA and will be under powered to use as a trigger. I was told that I would need to use a bipolar junction transistor between the LED and the relay. Does this sound feasible? If so, what would be a good transistor (part number) to use, and how would we wire it to both the LED and the relay? Thanks.