![]() ![]() This means both the exposure and the shutter can be controlled from the computer. ![]() This allows multiple switches to be controlled. One nice thing about a parallel port is that it has several pins which are all functionally distinct from one another, in "parallel". ![]() Custom software that is specifically written to control these modified webcams set the voltages on the pins of the parallel port either high or low, thereby toggling exposure control on the camera. Windows users of long exposure modified webcams have been doing this from the start by using the various pins on the parallel port as switches. Logitech Quickcam Pro 3000 Long Exposure Modification Subsequent Modification to Permit Mac Exposure Control and Amp-off CircuitĪfter using the camera with the physical switches for about a year I finally decided to make an attempt at designing and implementing a computer control system.
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