What exactly is PINB | = 0b00000001;

[johnwasser]

@filmchaser

I was looking at sone code that was manipulating to run pwm at around 100hz.

100 Hz is quite slow for PWM. Did you mean 100 kHz (100,000 Hz)? It seems odd that someone would be writing to registers for PWM when the AVR processor has hardware PWM features.