fix strobe effect frequency (#300)

* fix strobe effect frequency

* Changed the frequency in the effect definitions

effects/strobe-blue.json

@@ -4,6 +4,6 @@
 	"args" :
 	{
 		"color"     : [ 0, 0, 255 ],
-		"frequency" : 10.0
+		"frequency" : 5.0
 	}
 }

effects/strobe-raspbmc.json

@@ -4,6 +4,6 @@
 	"args" :
 	{
 		"color"     : [ 188, 17, 66 ],
-		"frequency" : 10.0
+		"frequency" : 5.0
 	}
 }

effects/strobe-white.json

@@ -4,6 +4,6 @@
 	"args" :
 	{
 		"color"     : [ 255, 255, 255 ],
-		"frequency" : 10.0
+		"frequency" : 5.0
 	}
 }

effects/strobe.py

@@ -8,7 +8,7 @@ frequency = float(hyperion.args.get('frequency', 10.0))
 frequency = min(100.0, frequency)
 
 # Compute the strobe interval
-sleepTime = 1.0 / frequency
+sleepTime = 0.5 / frequency
 
 # Start the write data loop
 while not hyperion.abort():