Using TimerOne Library

See here

Using Code

Initialise

  //Enable gobal interrupts (should already be enabled but do anyway)
  SREG = SREG | B10000000;

Turning interrupt on

  TIMSK1 = B00000001;             //Turn on Timer/Counter 1 overflow interrupt (bit 0).

  TCCR1B = B00000001;             //Turn on the counter with no prescaler

Turning interrupt off

  TCCR1B = 0;

Interrupt function

ISR(TIMER1_OVF_vect)
{

}