Source : WordNet®

tinkerer
     n 1: an unskilled person who tries to fix or mend [syn: {fiddler}]
     2: a person who enjoys fixing and experimenting with machines
        and their parts [syn: {tinker}]
     3: a traveling repairman who mends broken things (such as metal
        household utensils) [syn: {mender}, {tinker}]