Simple Arduino code to read levels from a SparkFun Sound Detector and turn on LEDs accordingly.
SparkFun Sound Detector: https://www.sparkfun.com/products/12642
Arduino UNO: https://www.mcielectronics.cl/shop/product/arduino-uno-r3-arduino-10230
I used this on my 3D-printed Google Home Wurlitzer, to drive the 12 LEDS according to the music:
| Arduino | Connected to |
|---|---|
| A0 | Sound Detector Envelope |
| 5V (POWER) | Sound Detector VCC |
| GND (POWER) | Sound Detector GND |
| GND (14) | All LEDs (-) |
| PIN 5 | LED 1 and 7 (+) (with a 330 ohm resistor) |
| PIN 6 | LED 2 and 8 (+) (with a 330 ohm resistor) |
| PIN 7 | LED 3 and 9 (+) (with a 330 ohm resistor) |
| PIN 8 | LED 4 and 10 (+) (with a 330 ohm resistor) |
| PIN 9 | LED 5 and 11 (+) (with a 330 ohm resistor) |
| PIN 11 | LED 6 and 12 (+) (with a 330 ohm resistor) |