Greenwatts

LM339 Circuit Build

This is not the easiest way to make the LM339 circuit board but it is totally free and all the parts are recycled. Start by finding a scrap board that has a section with little or no thru-hole components on it (an area aprox 4cm x 4cm). Take a course file and simply file off the protruding leads on the trace side of the board. The components will then just fall off fairly easily, remove all of the components and you will be left with a blank pcb board.