You could ditch the relay and wire straight into op1 set to 48

 

Viper led comes on when struck and stays on until reset, it will go out briefly if struck again

be a good idea for 1 or 2 vipers, but if more i'd respectfully suggest stick with the relay because OP1 don't have much current available

(iirc sinks either 50 or100ma?)

Blimey that was quick, don't you guys have TV to watch?! Thanks for the suggestions. So the conclusion is that the board doesn't effect the programming, and I should set op1 to 49. I'm pretty sure I tried that earlier, but I'll give it another go. Thanks again. 

I do, 48 inch 3D all singing dancing Smart telly, but by the time Mrs Mo has watched her catch-up Tv,  Deal no Deal, Eastenders, Antique Road show and Master Cheff, i come I here just for some refuge .

 

 but by the time Mrs Mo has watched her catch-up Tv,  Deal no Deal, Eastenders, Antique Road show and Master Cheff, i come  here when jeremy kyle has finished

LOL!

epitome of car crash telly