From 0880512e572e3d409a87c65b4f64d09c887445f8 Mon Sep 17 00:00:00 2001
From: firepixie <erin@firepixie.com>
Date: Tue, 16 Jan 2018 13:48:06 -0800
Subject: [PATCH] Unicorn Horn with Capacitive Touch

Code upload
---
 .../UnicornHorn_CapacitiveTouch.ino           | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 UnicornHorn_CapacitiveTouch/UnicornHorn_CapacitiveTouch.ino

diff --git a/UnicornHorn_CapacitiveTouch/UnicornHorn_CapacitiveTouch.ino b/UnicornHorn_CapacitiveTouch/UnicornHorn_CapacitiveTouch.ino
new file mode 100644
index 00000000..e6befb15
--- /dev/null
+++ b/UnicornHorn_CapacitiveTouch/UnicornHorn_CapacitiveTouch.ino
@@ -0,0 +1,96 @@
+#include "Adafruit_FreeTouch.h"
+#include "FastLED.h"
+
+#define CAPTOUCH_PIN A1
+#define NEOPIXEL_PIN 1
+#define LED_PIN 0
+#define NUM_LEDS    12
+
+#define LED_TYPE    WS2812
+#define COLOR_ORDER GRB
+CRGB leds[NUM_LEDS];
+
+int BRIGHTNESS=150;
+int touch = 500;    // Change this variable to something between your capacitive touch serial readouts for on and off
+
+long oldState = 0;
+int gHue=0;
+
+Adafruit_FreeTouch qt_1 = Adafruit_FreeTouch(CAPTOUCH_PIN, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
+//Adafruit_FreeTouch qt_2 = Adafruit_FreeTouch(A2, OVERSAMPLE_4, RESISTOR_50K, FREQ_MODE_NONE);
+
+
+
+void setup() {
+  Serial.begin(115200);
+
+  if (! qt_1.begin())  
+    Serial.println("Failed to begin qt on pin A1");
+  
+   pinMode(LED_PIN, OUTPUT);  //initialize the LED pin
+
+   FastLED.addLeds<WS2812, NEOPIXEL_PIN, COLOR_ORDER>(leds, NUM_LEDS);  // Set up neopixels with FastLED
+   FastLED.setBrightness(BRIGHTNESS);
+   FastLED.setMaxPowerInVoltsAndMilliamps(3,350);  //Constrain FastLED's power usage
+}
+
+void loop() {
+  
+  Serial.print(qt_1.measure());
+  Serial.write(' ');
+  checkpress();
+  delay(20);
+}
+
+void checkpress() {
+
+// Get current button state.
+ 
+    long newState =  qt_1.measure();  
+    Serial.println(qt_1.measure());
+   if (newState > touch && oldState < touch) {
+    // Short delay to debounce button.
+    delay(20);
+    // Check if button is still low after debounce.
+    long newState =  qt_1.measure(); }
+
+ 
+  if (newState > touch ) {  
+     dark();
+     digitalWrite(LED_PIN, HIGH);
+     delay(20);
+    }
+
+    else {
+      rainbow();
+      digitalWrite(LED_PIN, LOW);
+      delay(20);
+    }
+
+   
+    
+  // Set the last button state to the old state.
+  oldState = newState;
+
+  // do some periodic updates
+  EVERY_N_MILLISECONDS( 20 ) { gHue++; } // slowly cycle the "base color" through the rainbow
+} 
+
+void rainbow() 
+{
+  // FastLED's built-in rainbow generator
+  fill_rainbow( leds, NUM_LEDS, gHue, 7);
+  FastLED.show();
+  delay(20);
+  
+}
+
+void dark()
+{ 
+  for(int i = 0; i < NUM_LEDS; i++) { 
+  leds[i] = CRGB::Black; 
+  FastLED.show();
+  delay(20);
+}
+}
+