Well i figured all that out but at this moment all of my camera controllers use optoisolators not relays. I had one prototype with a relay but I am using OKs to keep current down and size small. Just trying to figure the current thing out at the moment. I picked up a couple of 4N33 (OKs with Darlington transistors) yesterday to test and see if I can use them with 1-5mA if so that may be the ticket. I am also going to futz with my current crop of controllers and see if I can reduce the OK current to around 20mA. I have about a dozen at the moment I am using for shooting the space shuttle launch. I also have 4 arduino's I am using as well. I may use more in the future. I really like the fact I can program them for a week or more of launches, the launch time changes every day, so it makes life a bit easier.