Transforming a Nintendo 64 into a Handheld Console. Steampunk. What-can-you-learn-on-youtube from soup.io. Lesson Plan for Making a Speaker Laboratory. ©1995 The Regents of the University of California by Regan Lum Introduction: A speaker is a device that converts an electronic signal into sound.
The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source.