Brightness adjustement

Reduce brightness when writing the color values.

.gitignore

@@ -0,0 +1,2 @@
+
+*.bak

ws2812b.py

@@ -26,7 +26,19 @@ class ws2812b:
         self.sm.active(1)
         self.num_leds = num_leds
         self.delay = delay
-        
+        self.brightnessvalue = 255
+
+    # Set the overal value to adjust brightness when updating leds
+    def brightness(self, brightness = None):
+        if brightness == None:
+            return self.brightnessvalue
+        else:
+            if (brightness < 1):
+                brightness = 1
+        if (brightness > 255):
+            brightness = 255
+        self.brightnessvalue = brightness
+
       # Create a gradient with two RGB colors between "pixel1" and "pixel2" (inclusive)
     def set_pixel_line_gradient(self, pixel1, pixel2, left_red, left_green, left_blue, right_red, right_green, right_blue):
         if pixel2 - pixel1 == 0: return
@@ -48,6 +60,11 @@ class ws2812b:
             self.set_pixel(i, red, green, blue)
 
     def set_pixel(self, pixel_num, red, green, blue):
+        # Adjust color values with brightnesslevel
+        blue = round(blue * (self.brightness() / 255))
+        red = round(red * (self.brightness() / 255))
+        green = round(green * (self.brightness() / 255))
+
         self.pixels[pixel_num] = blue | red << 8 | green << 16
         
     def show(self):