Quote Originally Posted by AvionicsMaster1 View Post
I don't have a 5v relay that will push 10 amps through its contacts.
Why must it be a 5v relay? If you have a higher voltage available, you could use that with an NPN, right? In fact, at 12 v you'll have a choice to pick from. I have sugar-cube relays that state the contact rating to be 10A @ 28v, but if you dont want to take chances you can always use larger ones.

Regards,

Anand