Method of forming a wiring pattern for an electronic circuit on a general-purpose circuit board

A method of forming a wiring pattern for an electronic circuit on a general-purpose circuit board, comprising the steps of:

• (a) providing a general-purpose circuit board and a burning jig, said circuit board comprising a plate made of an insulating material, a plurality of parallel conductive lines extending on said plate in a vertical and a horizontal direction, and through holes formed in said plate at all junctions of said plurality of conductive lines and each being surrounded by a four conductive portions which are respectively connected to four of said plurality of conductive lines adjoining the through hole in the horizontal and vertical directions and are insulated from each other, said burning jig comprising a flat plate and a plurality of burning pins studded on said flat plate and respectively corresponding in position to all of said through holes, said burning pins each comprising four metal pieces insulated from each other and respectively corresponding to said four conductive portions;
• (b) inserting all of said burning pins into corresponding ones of said through holes;
• and
• feeding a current to between facing ones of said metal pieces of two of said burning pins which correspond to designated two nearby ones of said through holes to thereby burn off one of said conductive lines connecting the facing conductive portions of said two nearby through holes.