Timer 2 is used by the core of Arduino for PWM operation. Option to shutdown Timer 0, Timer 1, USART0, TWI, and SPI module in idle mode. Option to hook up watchdog ISR to execute custom code There isn ...

[Scott-28] recently sent in a particularly well-documented project that turned an antique rotary phone into a digital kitchen timer ... to connect the dial to one of the pins on an Arduino Uno ...

In the implementations on this repository, the Arduino hardware timer (Timer1) was used, making the interrupt at the zero-crossing non-blocking. There is also libraries provided by manufacturers of ...