Programming the timers to 3.84KHz

Hello all! I got these instructions for programming the arduino from another member on here. But again I'm STUCK! I don't know how to program my arduino timers to get the 3.84KHZ! Does anyone have the code to accomplish this step? I really need help as this is due monday! thank you all for your help and assistance!

https://www.pjrc.com/teensy/td_libs_TimerOne.html
http://playground.arduino.cc/Main/TimerPWMCheatsheet

are you using Uno or Mega?

actually im using an osepp Uno R3 plus. (arduino compatible)

Thank you for the help! It's very appreciated!