Adjusting Sound Level

Preceded by

Sound Activated Switch

Succeeded by

Lamp & Fan in Series

New Pieces

6, R1,

Objective Edit

To show how resistance can lower the sound from the speaker.

Description Edit

Build the circuit shown on the left. When you close the slide switch (S1), the music may play for a short time and then stop. After the music has stopped, clap your hands close to the whistle chip (WC) or tap the base with your finger. The music should play again for a short time, then stop.

In this project, you changed the amount of current that goes through the speaker (SP) and reduced the sound output of the speaker. Resistors are used throughout electronics to limit the amount of current that flows.