This is a step-by-step to take pictures like if you have night vision, so if you want to try this with your brand new cellphone, the one you use for everything and it is special for taking selfies, my advice is don't do it.
Search for another because this is irreversible, once you're taking night vision photos, you can't go back to taking normal photos.
-Old cellphone or a cell you're not using for common things
-9 infrared leds
-tweezers, knife or a razor
-and for the final board I use a 3D print design
Step 1: Remove the Camera Cover
You have to take off the cover in order to remove the battery.
Then carefully with a tweezers take off the cover where the camera is, I made this because the cellphone I'm using is of the kind who slides.If you´re using the normal type, just take off the cover .
Step 2: Camera Lens
Now , take off the camera lens.
It's a simple step, but do it carefully we don't want to brake anything.
Step 3: Infrared Filter
Once you have the complete camera lens, with a knife or a razor remove the infrared filter.
Step 4: Back Together
Now put the camera lens back to the original place, and the cover as well.
Step 5: Infrared Board Led
Here we are going to make like a base, in a perfored board set 9 infrared leds and do an adjustment to make them in serially at 3.6 volts .Maybe you will need some welding skills and know something very basic about electronics.
Step 6: Led Base
In this step I made a 3D design to have the led board in place and adjust it to the cellphone cover.
The led board is directly connected to the cell battery and it fits perfectly into the 3D base, just to make it easy and trying not to damage the battery a switch was added to the design to turn on/off the infrared leds.
Step 7: Final Result
At the end if you follow all the steps you will have your night vision camera in a cell, something like this...