Procedure:

Finally we make a magnet bridge using the popsicle stick or PCB strip and two small pieces of straw. Then we connect the speaker to an audio signal.

Materials / Main Page

 

Step 4:

• Cut the straw pieces about one sixteenth of an inch longer than the coil form straw (Approximately 5/16" length).
• Hot glue the two pieces of straw on opposite edges of the cup.
• Glue the small magnet to the center of the bridge.(Align the small magnet so it sits freely in the center of the coil form straw.)
• Glue the bridge into place on the tops of the two bridge support straws.

 

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Step 5:

• Connect your speaker to an audio signal source such as the radio built in last month's experiment.