In this tutorial we will set up the TIMER0 in fast pwm mode and use it to generate PWM signals of varying duty cycles. In this way we would be generating analog signals of voltages between 0 and 5v. In the example we will connect this output to a LED and see how it varies its brightness. Please see the previous tutorials on PWM and TIMERs before reading this tutorial. PWM Introduction to PWM – Pulse Width Modulation PWM Signal Generation with AVR Timers. Timers Introduction To AVR Timers. Timers In Compare Mode Part I Timers In Compare Mode Part II Setting Up TIMER0 in Fast PWM mode Setting up the TIMER0 in fast pwm mode is very easy and just require one line of code. You only need to deal with one register named TCCR0 (Timer Counter Control Register For Timer 0). You just need to set up various bits in it to get the required setting. The various bits of TCCR0 is given below. TCCR0 This register is used for configuring the TIMER0. See Timer Tutorial for more info. The explanation of various bits of this register is as follows. Bit No 7 6 5 4 3 2 1 0 Name FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00 Initial Val 0 0 1 0 0 0 0 […]