One interesting use for flickering LEDs is to help figure out the readout speed and clock rate of a digital camera sensor by exploiting the rolling shutter. Som

One interesting use for flickering LEDs is to help figure out the readout speed and clock rate of a digital camera sensor by exploiting the rolling shutter. Some discussion and experiments on this technique can be found here: https://www.magiclantern.fm/forum/index.php?topic=23040.0 https://www.magiclantern.fm/forum/index.php?topic=23040.0