In this Electronics video tutorial you will learn how to make a laser pen from a DVD burner. Take a DVD burner, remove all the screws from the bottom panel and remove the panel. Then remove the rest of the body cover as shown in the video. After this the laser will be revealed. Now remove all the screws around the wires and lift up the laser assembly. Undo all the screws on the laser assembly and remove the unit containing the laser diode. Now cut around the unit with a hack saw to get the diode out. Don't cut through it. Get a laser module from a store for a few dollars and the video for further instructions on how to make the laser pen.