The noisy light
Electronic

Some things go out with a bang ... others with a whimper... but this project just goes pop!

When you finish wiring this project, press and hold down S1. LED 1 lights up.

Keep holding down S1, and LED 1 goes out. You hear a "popping" sound from the speaker when this happens.

Keep holding S1 down and something interesting happens... the LED lights back up! It briefly stays on and goes out again, making another "pop" as it goes out. This continues over and over as long as you hold S1 down.

The project uses a multivibrator circuit. You now know that the multivibrator circuits let us switch things (like the LED in this project) on and off electronically. They're also used in many of the digital electronics circuits.