Using timert in CTC mode and interrupts create a 50HZ square wave on pin 5. Use a prescaling of 256 define Led Toggle digitalWrite void setup 0 ( pinMode /Disbale global interrupts initialization of control register A initialization of control register B // enable interrupts initialization of the output compare register // Enable global interrupts ISRO Led Toggle void loop 0 0 OX0B 55536 OX0A TIMER1 COMPA vect Ox00 TIMER1 OVE vect INPUT Ox01 60536 Ox05 63036 65458 TCNT1 4. 40000 sei() 625 TIMSK1 OCR1A 25536 65224 65380 1250 digitalRead 20000 156 45536 64286 cli) TCCR1B 64911 312 5000 digitalWrite OXOC OXOD 78 2500 OUTPUT TCCR1A 10000

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