The Pi camera module includes a red LED in one corner of the PCB. This lights up when the camera is active. It’s really useful in giving a visual indication that the camera is doing something and most of the time you will be glad it is there.

However there are a number of reasons you might wish it wasn’t.

To disable the red LED you simply need to add the following line to your config.txt file :

disable_camera_led=1

To edit the config.txt file you can use Nano :

sudo nano /boot/config.txt