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Give a child a toy and they're happy for an hour.
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A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; which converts an electrical audio signal into a corresponding sound. Source: Wiki
A math assignment might be calculating how many toggles or cycles of the PIN going high and low it takes for each note of the scale.
click to magnify the image With a Frequency Counter or Oscilloscope you can see the exact output! The two capacitors in the image are not needed most of the time, but help to maintain an even volume by storing the power to drive the speaker as a power ballast. |