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arduino-cli/libraries/LEDbar/examples/HelloWorld/HelloWorld.ino

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+/*****************************************************************
+| LEDbar Arduino library - based on the 74HC164 shift register   |
+| Developed and maintained by MCUdude                            |
+| https://github.com/MCUdude/LEDbar                              |            
+| Released to the public domain                                  |
+|                                                                |
+| Hello world! - A basic test program that shows the different   |
+| functionality in this library                                  |
+*****************************************************************/
+
+// Include the library code
+#include "LEDbar.h"
+
+// Pin definitions
+byte CLK = 5;
+byte DATA = 6;
+byte DIM = 7;
+
+// Constants
+const byte numberOfLEDs = 8; // My module has 40 LEDs
+const byte commonDelay = 10;  // Use the same delay everywhere
+
+// Global variables
+
+// Initialize the library with dim pin
+//LEDbar led(CLK, DATA, DIM);
+// Alternative without dim pin (tie the dimm pin on the LED bar to Vcc)
+LEDbar led(CLK, DATA);
+
+
+void setup()
+{
+	// Initialize the LED bar with 40 LEDs
+	led.begin(numberOfLEDs);
+	
+	// Set the brightness to 100 (8-bit --> 0 - 255)
+	//led.brightness(10);
+}
+
+
+void loop()
+{
+	
+	// Grow from 0 to 40 from left to right
+	for(uint8_t i = 0; i < numberOfLEDs; i++)
+  {
+    led.setLevel(i);
+    delay(commonDelay);
+  }
+  
+  // Reduce from 40 to 0 from right to left
+  for(uint8_t i = numberOfLEDs; i > 0; i--)
+  {
+    led.setLevel(i);
+    delay(commonDelay);
+  }
+  
+  // Grow from 0 to 40 from right to left
+  for(uint8_t i = 0; i < numberOfLEDs; i++)
+  {
+  	// A minus indicates to start from the oposite side
+    led.setLevel(-i);
+    delay(commonDelay);
+  }
+  
+  // Reduce from 40 to 0 from left to right
+  for(int8_t i = numberOfLEDs; i > -1; i--)
+  {
+    // A minus indicates to start from the oposite side
+    led.setLevel(-i);
+    delay(commonDelay);
+  }
+  
+  // Short pause
+  delay(2000);
+  
+  // Bounce back and forth, and grow each every time
+  for (uint8_t i = 1; i < numberOfLEDs; i++)
+  {
+    // Count up
+    for (uint8_t j = 0; j < numberOfLEDs - i; j++)
+    {
+      led.setDots(j, i); // (position, number of leds lit)
+      delay(commonDelay * 5); // Slow down a little
+    }
+    
+    // Count down
+    for (int8_t j = numberOfLEDs - i; j > -1; j--)
+    {
+      led.setDots(j, i); // (position, number of leds lit)
+      delay(commonDelay * 5); // Slow down a little
+    }
+  }
+  
+  // Set different repeating patterns
+  // Default length is 8 bit  
+  led.setPattern(0b11110000); 
+  delay(3000);
+
+  // Length 20 bit
+  //led.setPattern(0b11111000001111100000, 20); 
+  //delay(3000);
+
+  // Length 40 bit
+  //led.setPattern(0b1111111011111100111110001111000011100000, 40); 
+  //delay(3000);
+  
+  // Clear all - fill with zeros
+  led.clear();
+  delay(1000);
+	
+	
+}

arduino-cli/libraries/LEDbar/examples/VUmeter/VUmeter.ino

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+/*****************************************************************
+| LEDbar Arduino library - based on the 74HC164 shift register   |
+| Developed and maintained by MCUdude                            |
+| https://github.com/MCUdude/LEDbar                              |            
+| Released to the public domain                                  |
+|                                                                |
+| VU meter example - Read analog pin A0 and display the level    |
+| on the LED bar.                                                |
+*****************************************************************/
+
+// Include the library code
+#include "LEDbar.h"
+
+// Pin definitions
+byte CLK = 5;
+byte DATA = 4;
+byte DIM = 3;
+byte analogPin = A0;
+
+// Constants
+const byte numberOfLEDs = 40; // My module has 40 LEDs
+
+// Global variables
+byte vuData = 0;
+
+// Initialize the library with dim pin
+LEDbar led(CLK, DATA, DIM);
+// Alternative without dim pin (tie the dimm pin on the LED bar to Vcc)
+//LEDbar led(CLK, DATA);
+
+
+void setup()
+{
+	// Initialize the LED bar with 40 LEDs
+	led.begin(numberOfLEDs);
+	
+	// Set the brightness to 100 (8-bit --> 0 - 255)
+	led.brightness(100);
+}
+
+
+void loop()
+{
+	// Map the analog value (0 - 1023 steps) to fit the LED bar (0 - 40 steps)
+	vuData = map(analogRead(analogPin), 0, 1023, 0, numberOfLEDs);
+	
+	// Display vuData on the LED bar
+	led.setLevel(vuData);
+	
+  // Alternative way to run from the oposite direction
+  //led.setLevel(-vuData);
+  
+  // Slow down a little
+  delay(5);
+}