Input/Output: Proof of concept

Circuit diagram:

I used Fritzing to create the circuit diagram. The green chip on the left represents the LED strips while the green chip on the right is our mic sensor (we used a MEMS microphone [ICS-40180], which is actually red but this was the closest thing I could find in the program). We plan to use a different mic (preferably a condenser mic) for the actual crit, but as we are testing it was more worthwhile just to use a small mic sensor.

Arduino Code (so far):

#include <Adafruit_NeoPixel.h> #ifdef __AVR__ #include <avr/power.h> #endif #define PIN 9 #define NUMPIXELS 96 //if i change this to 114 (this is how many I have), it won't load the sketch Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800); int mic = A0; int micMapped, micMapped2; float delta; //range converted to 0-1023 rather than jumping above and below baseline) float smoothed; // more "averaged" value int brightness = 20; int fadeAmount = 5; float ran[96]; float follower[96]; int timer[96]; float maxTime[96]; void setup() { pixels.begin(); // This initializes the NeoPixel library. pixels.show(); // start with all pixels off pinMode(mic,INPUT); pinMode(9, OUTPUT); Serial.begin(9600); } void loop() { //bridge (leds 0 - 13) for (int i = 0; i < 13; i++){ pixels.setPixelColor(i, pixels.Color(brightness, 0, 0)); } pixels.show(); brightness = brightness + fadeAmount; if (brightness <= 20 || brightness >= 255) { fadeAmount = -fadeAmount; } delay(100); // wait to see the dimming effect (this causes flashes otherwise); //buildings int micValue = (analogRead(mic)); micMapped = map(micValue,500,520,14,90); //change this depending on the mic /* if(micValue > 512){ delta = (micValue - 512) * 2; } */ float ease = 0.01; smoothed += (delta - smoothed) * ease; Serial.print("mic value = "); Serial.println(micValue); Serial.println(micMapped); delay(50); //used for testing purposes for (int i = 14; i < 90; i++){ if(i<=micMapped){ //to make a gradient: float r = map(i,14,90,0,255); float b = map(i,14,90,220,0); pixels.setPixelColor(i, pixels.Color(r,0,b)); } else{ pixels.setPixelColor(i, pixels.Color(0,0,0)); //without this, it kept climbing without going back down } } pixels.show(); //shows the pixels after the previous coding //stars for(int i = 90; i<96; i++){ pixels.setPixelColor(i, pixels.Color(follower[i],follower[i],follower[i])); } pixels.show(); //not sure if changing i = 0 to i = 90 is doing anything //stars are only going up to i < 97 before it stops working (like the upload won't even work), but a stand test shows that all of them work together for(int i = 90; i < 96; i++){ timer[i]++; if(timer[i] > maxTime[i]){ ran[i] = random(0,200); //this is seen as brightness timer[i] = 0; //this is speed maxTime[i] = random(25,80); } follower[i] += (ran[i] - follower[i]) * .1; } }

Interaction with working concept:

The main issue that can be seen in the video is that the response to sound isn't exactly fine-tuned. I think I would need to go back and look at the input through the serial monitor and I also need to test this with a condenser mic. Another issue I found with this so far is that the "stars" aren't working properly. By this, I mean that instead of having a random fade in and out, they are functioning similar to the buildings and flickering between white and yellow instead.