C172 PVT PLT HAS SMOKE IN COCKPIT AND DIVERTS TO CLOSEST ARPT.

Narrative

I DEPARTED UNDER PART 91 ON A PERSONAL FLT. ABOUT 5 MINS AFTER DEP; ON A TRANSITION THROUGH AIRSPACE; I BEGAN TO NOTICE AN ODOR OF SOMETHING BURNING. AT THAT POINT; I BEGAN TO ASSESS THE SYS AND FOUND NO ANOMALIES. APPROX 2-3 MINS LATER; I NOTICED THAT THE ODOR BECAME STRONGER. AGAIN I REASSESSED ALL SYS. AT THAT POINT I NOTICED A HAZE IN THE COCKPIT. I THEN CONTACTED TWR AND REQUESTED AN IMMEDIATE CLRNC TO LAND; FOR SMOKE IN THE COCKPIT. I WAS THEN CLRED TO LAND STRAIGHT-IN FOR RWY 5. AT THIS POINT I SHUT DOWN EVERYTHING ELECTRICAL EXCEPT THE PRIMARY COM RADIO WHICH I WAS COMMUNICATING ON WITH TWR. THE SUBSEQUENT LNDG WAS WITHOUT INCIDENT. ONCE ON THE GND; TWR ASKED IF I NEEDED ANY ASSISTANCE. I REPLIED NO NOT AT THIS TIME; AND REQUESTED TO TAXI TO GA PARKING; WHERE I WAS MET BY A FIRE TRUCK. THE FIRE MAN LOOKED AT THE PLANE AND STATED THERE WAS NO FIRE; BUT A NOTICEABLE ODOR. AFTER EXAMINATION OF THE BACK OF THE INSTS; I NOTICED THAT THE LNDG AND TAXI LIGHT SWITCHES HAD STARTED TO MELT.