The night was always a mystery. Then mankind found fire and could light up the night. After a few more years mankind developed light bulps, photography and finally digital photography. And now I come along and present you a cheap device that allows you to take pictures in the night without intervening the scene.
The idea came up, when I wanted to develop a device to take pictures at a party without blinding everybody with a strong flash.
So what do you need:
Some IR-LEDs, the stronger the better (20-60 pieces)
a power transistor (i.e. BD649)
some capacitors (1000uF or more)
one resistor (50Ohm)
an old mouse button
and some breadboard
To use it, you need of course an IR-sensitive camera. You can build these by yourself or get someone to convert it for you. Look at these guys here: www.lifepixel.com
My other instructable is about how to make a Nikon 4300 IR sensitive. Look here!