№ 10 · you build it
Make it click
One press of the button, one click out of the speaker.
- 1Tap the battery, then the button, then the resistor, then the speaker.
- 2Tap the speaker, then the battery.
- 3Press the Sound on button, then tap the red dome.
NOW Tap the battery, then the button, then the resistor, then the speaker.
What to look for: A click when you press and another when you let go. A speaker only makes a sound when the current changes.
Why it works: A speaker only makes a sound when the electricity changes. Press the button and the electricity jumps from nothing to something: click. Let go and it jumps back: click again.