add "Timer" library

README.md

@@ -57,7 +57,7 @@ A curated list of awesome Arduino hardwares, libraries and projects
 * [ov7670-no-ram-arduino-uno](https://github.com/ComputerNerd/ov7670-no-ram-arduino-uno) -  arduino library for ov7670
 * [DHT-sensor-library](https://github.com/adafruit/DHT-sensor-library) - Arduino library for DHT11DHT22, etc Temp & Humidity Sensors
 * [rfid](https://github.com/miguelbalboa/rfid) - Arduino RFID Library for MFRC522
-
+* [Timer](https://github.com/JChristensen/Timer) - A fork of Simon Monk's Arduino Timer library
 
 *3D Printer .*