Turn a discarded valise and some audio tubes into a mesmerizing light show using Neopixel LEDs, a MEMS microphone, and a SparkFun audio tone processor.

Turn a discarded valise and some on-sale audio tubes into a mesmerizing light show using Neopixel LEDs, a MEMS microphone, and a SparkFun audio tone processor.

We build on our previous LoRa IoT weather sensor to run for a year on 2x AAA batteries. We'll look at the AVR ATmega328p datasheet to determine which registers we need to use to put the microcontroller to sleep, and we'll calculate how long we need to sleep before sampling the sensor again.

In this project, we’ll learn how to use an ATMega 328P-PU a 433 MHz RF together.