That is what I was intending to use originally. In the past I made a vu meter for my classroom using the neopixels and neopixel library. I followed the instructions found here:Overview | LED Ampli-Tie | Adafruit Learning System . I was hoping to modify the sketch from that project to change the input from a microphone to the voltmeter circuits. I am just not sure how to modify it correctly. In addition to modifying the input I would also need to modify it for two voltmeter circuits. I have already cut and soldered my neopixels to make two addressable strips.