Well they did not go out with a boom but for some reason the gate to source resistance is now 92 Ohms so they are unusable.
They were part of an H-bridge configuration that controlled a stepper motor. Type IRF510. The schematic is bellow.
Everything was working out great until I swapped the MOSFET 2V power supply for one of the same voltage.
How does something like this happen to a MOSFET? what did I do wrong? Should I be using resistors on the FET's gate?
The FETs that broke were both connected directly to an AVR output pin. The ones that broke are in the blue circles bellow.The logic circuit works on a 9V battery with a 5V regulator.