Lixie Labs| Quantity | Component name | |
| 1 | × | ATmege328p / based Arduino |
| 1 | × | Speaker / Piezo |
| 1 | × | NOTHING ELSE! |
10-bit Component-less Volume Control for Arduino!
Using PWM at an ultrasonic frequency, I've given Arduino 10-bit volume control for Tone() generation using nothing but the speaker.