None of the 3.5mm audio jacks I know of fit on a standard breadboard. Here is a breakout board for the "Lumberg KLBR4" audio jack to fix this.
klbr4 3.5mm audio jack dual breakout board
None of the 3.5mm audio jacks I know of fit on a standard breadboard. Here is a breakout board for the "Lumberg KLBR4" audio jack to fix this.
klbr4 3.5mm audio jack dual breakout board