title: Quickly (100Hz or more) blinking of camera flashlight LED
body: <p>I am trying to write a variable brightness flashlight app by using PWM (might use it for communication later). For that I need fast switching of the camera LED (say 100-200Hz), which is not possible through the Camera API's setParameters functionality (I guess the camera itself slows things down considerably).</p>
  
  <p>Now – The LED is capable of switching rapidly and there are apps doing something similar (HTC flashlight for example, unfortunately couldn't find source code for it) so it all comes down to controlling the LED without the camera.</p>
  
  <p>Any thoughts or ideas?</p>