2) NeoPixel & Relay Meet Electret

For the second log, we learned how to manipulate both the NeoPixel Ring - 16 x 5050 RGB LED and the 5V Single-Channel Relay Module using a 50 millisecond peak to peak noise level amplitude captured by an Electret Microphone Amplifier - MAX9814.

During this exercise we figured out how to convert noise levels to volts, then percentages, and map the resulting values to an RGB numeric domain, so that every 50ms interval the Neopixel brightness readjusts depending on how loud Alexa's voice is.

At this stage, when the microphone detected the loudest levels the Relay used to pass current for one second to the voice changer switch, altering between Alexa’s tones. For the last version, we decided to simply activate the Relay every 10000ms.