https://www.youtube.com/watch?v=t3_hor588Mg

How to create an automatic fading LED strip lighting (for kitchen or any other room) based on an Arduino, a PIR (passive InfraRed) sensor, a rotary encoder and a power FET module. The LEDs fade on when the sensor detects movement and fade off after a configurable time of no movement. The sensor can be overruled by a short press of the encoder switch. The LEDs and sensor can be switched off by a long press.