Well, the first thing you are doing wrong is posting before reading How to use this forum
Beyond that, with the limited information that you provided [having not read the above]:
- Your description of it blowing out when the Relay clicks, suggests there is no protection diode across the relay coil. Check out the following: Relays | Electronics Club
- I've had the problem of clone Pro Minis not handling 12V [where proper Pro Minis handle 12V just fine].
- Do you really expect us to know what Relay Board you're talking about? Think about that
