№ 7 · built for you
Make it sing
The same circuit, so fast you hear it instead of see it.
- 1Press the Sound on button.
- 2Listen.
- 3Look at the blinking one again — it is the same shape.
NOW Look at the blinking one again — it is the same shape.
What to look for: A steady buzzy note. It is the blinker, going about a thousand times faster than your eyes can follow.
Why it works: This is the blinking circuit with tiny cans instead of big ones. Tiny cans fill up so fast that the blinks come hundreds of times a second, far too quick to see. Your ears can keep up with that, so the speaker sings it.