A General Aviation pilot reported entering Class C; citing the distraction of multiple avionics failures coupled with smoke and low visibility from a local wildfire as contributing factors.

Narrative

On a VFR flight from 7FL6 to ZZZ; I took off on Runway 24; turned to a heading of about 290 and was leveling off at 1000 ft. MSL to stay below the Class C airspace which starts at 1200 ft. MSL. It was at this moment that the radios; intercom; and GPS all went unpowered and I entered a cloud of smoke from a wildfire that was burning north of my position. Smelling the smoke and experiencing the avionics failures I assumed I had an electrical fire. After a few moments I regained all my avionics when I recycled the Avionics Master switch. Because my attention was diverted to the problem paired with the reduced flight visibility due to the smoke layer at the same moment; I had begun leveling off; [but] I inadvertently climbed into the Class C airspace. I believe two or three minutes may have passed before I realized I was in Class C airspace. I then immediately descended below 1200 ft. and I called Daytona Approach and told the controller what had happened and that the avionics problem seemed to be solved. Lessons learned: I have been flying for many years and this is the first time I thought that my aircraft was on fire. All of my attention went to getting the perceived fire out instead of staying out of the Class C. You still have to know where you are and keep other aircraft safe; even though you may have a dire problem to handle.