Simple Loudspeaker

This loudspeaker design consists of a plastic tub with lid, a screw, a wire, a magnet, and tape that when plugged into a stereo speaker output, generates sound and student enthusiasm. This activity illustrates electricity and magnetism phenomena by providing an example of the interaction between a current carrying wire and a magnet. The learner objective is that by building a simple loudspeaker, students will be able to evaluate an electromagnetic technology and explain that the goal of technology is to provide solutions to practical problems.

Step 1 Step 1: Gather Materials

• Plastic container with lid (8oz container)
• Wood screw (a bit longer than the tub height)
• 2 meters of insulated wire (24 gauge)
• One small permanent magnet
• Tape
• Screwdriver
• Wire stripper and cutter

For testing the speaker
• 1.5-V battery (AA or A)
• Sound signal source (e.g.,boom box or a radio receiver/amplifier with separate ground and signal connections to the speaker outputs)
• 4- to 6 ohm resistor

I used an old pringle container taht was cut to fit the screw size I used.

Comments

[Mr Sinster]

So are the speakers loud and can you include like a video of it in action.