Add submission # 4918

#4918

Author: ArduinoBot

registry.txt

@@ -7334,3 +7334,4 @@ https://github.com/pschatzmann/arduino-libmad.git|Contributed|libMAD
 https://github.com/pschatzmann/arduino-libopus.git|Contributed|libopus
 https://github.com/pschatzmann/arduino-libsbc.git|Contributed|libsbc
 https://github.com/pschatzmann/arduino-libvorbis-tremor.git|Contributed|libvorbisidec
+https://github.com/lhtran114/OnlyTimer.git|Contributed|OnlyTimer