Arduino & IoT Academy · Lesson

delay() and Blink Timing

Pause execution to make a visible blink rhythm.

Add a Pause

Switching a pin on and off happens in microseconds, far too fast to see. To make a real blink, you tell the board to wait with delay. ⏱️

The delay function pauses your sketch for a number of milliseconds. One second is 1000 of them, so delay(1000) waits one full second.

delay(1000);