Which Timer Does Millis Use?

Timer0 interrupt Clock Cycles
Timer 0 is setup so that it has a prescaler of 64. It is an 8 bit timer so overflows every 256 counts.

Which timer does Millis () use?

The Arduino Uno has 3 timers: Timer0, Timer1 and Timer2. Timer0 is already set up to generate a millisecond interrupt to update the millisecond counter reported by millis(). Since that is what we are looking for, we'll get Timer0 to generate an interrupt for us too!

Which timer is used for delay in Arduino?

Single-Shot Delay

A single shot delay is one that only runs once and then stops. It is the most direct replacement for the Arduino delay() method. You start the delay and then when it is finished you do something. BasicSingleShotDelay is the plain code and SingleShotMillisDelay uses the millisDelay library.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.