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libraries/TriacDimmer/examples/basic_example/basic_example.ino

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+/*
+  Basic Example.
+  
+  This sketch alternately fades two lights in and out, using a
+  digital mains AC dimmer switch board.
+
+  This sketch is meant to be used with one of these boards, or 
+  something similar:
+      https://www.amazon.com/Dimmer-Module-Controller-Arduino-Raspberry/dp/B06Y1GVG26
+      https://mdwdz.en.alibaba.com/product/60670737878-804998378/2CH_AC_LED_Light_Dimmer_Module_Controller_Board.html
+      http://www.inmojo.com/store/krida-electronics/item/2-channel-ac-led-bulb-dimmer-module-v2/
+
+  While this sketch is meant to be used with a dual-channel dimmer,
+  it can also control just a single channel (just leave the second
+  channel disconnected).
+  
+  Note that the circuit here uses high-voltage mains AC power - make
+  sure you understand the risks and take appropriate precautions.
+
+  The circuit:
+  * Pin 8 is connected to the dimmer 'sync' pin.
+  * Pin 9 is connected to the dimmer 'ch 1' pin.
+  * Pin 10 is connected to the dimmer 'ch 2' pin.
+  * The dimmer power input is connected to mains AC power.
+  * The dimmer channel 1 and channel 2 outputs are connected 
+      to lightbulbs or other devices.
+
+  Created 2017-02-23
+  By Anson Mansfield
+
+*/
+
+#include <TriacDimmer.h>
+
+// arduino pins
+unsigned char sync = 8; //sync pin
+unsigned char channel_1 = 9; // channel 1 pin
+unsigned char channel_2 = 10; // channel 2 pin
+
+void setup() {
+  // initialize the dimmer library.
+  TriacDimmer::begin();
+}
+
+void loop() {
+  // gradually increase brightness over time
+  for(float brightness = 0.00; brightness < 1.00; brightness += 0.01){
+  
+    // set channel 1 to the brightness value:
+    TriacDimmer::setBrightness(channel_1, brightness); 
+
+    // invert brightness for channel 2:
+    TriacDimmer::setBrightness(channel_2, 1 - brightness); 
+    
+    delay(20);
+  }
+  
+  // and back down - decrease brightness over time
+  for(float brightness = 1.00; brightness > 0.00; brightness -= 0.01){
+      
+    // set channel 1 to the brightness value:
+    TriacDimmer::setBrightness(channel_1, brightness);
+
+    // invert brightness for channel 2:
+    TriacDimmer::setBrightness(channel_2, 1 - brightness);
+    
+    delay(20);
+  }
+
+}