If you are into photography you need to have a look at this site. Lasers, cameras and LEDs are a good mix!

“The design begins with construction of a laser module. It is set up to contain 8 laser pointers, plus an additional IR (infrared) laser. This allows for sufficient expansion for other uses, including general high speed photography. A detector is provided for each laser. By pulsing the lasers, it is possible to connect multiple lasers to a single detector. That permits the use of fewer detectors and wires. Each laser can be turned on and off separately. LEDs show the state of each detector. One camera output is set up to handle the metering and the shutter.”

Thanks for the link Steve