Add submission # 2503

#2503

Author: ArduinoBot

registry.txt

@@ -5697,3 +5697,4 @@ https://github.com/chandrawi/ADE7753.git|Contributed|ADE7753
 https://github.com/gobbolab/room-weather.git|Contributed|Room Weather
 https://github.com/fredlarochelle/RunningStats.git|Contributed|RunningStats
 https://github.com/triqadafi/TQDF_WatchOS.git|Contributed|TQDF_WatchOS
+https://github.com/Justin-Pl/PCA9685_LED_DRIVER.git|Contributed|PCA9685_LED_DRIVER