This isn't changed by the mod, and so works in the usual manner (but the nature of the images that arrive changes, and therefore works best with special image capture software as opposed to standard webcam software). The first connection is the USB connection overwhich the computer configures standard webcam settings such as framerate and gain, and over which the camera will transmit images back to the computer.
Taking pictures with an SC modded camera requires two pieces of hardware, either one or two connections, and either one or two pieces of software (the software can be bundled into a single program however). I am purposefully vague here, putting "works with" in quotes and using the phrase "mostly not the case", because the true story is quite a bit more complicated and requires a deeper understanding of what is going on between the user, the computer, and the webcam.
The short answer here is that there is software for PCs that "works with" modded webcams, while this is mostly not the case for Macs.
USE STREAMING MODE FOR CAPTURE ASTROIMAGER MOD
The camera will no longer work with the large number of off-the-shelf and readily available webcam programs, or if the mod is performed in a certain way, the camera can be reverted to normal operation via a switch for use with normal software but will still not take long exposures in that mode of course. There is a fundamental challenge after the mod is completed however. I offer a detailed explanation of how I have performed the mod on two webcams elsewhere on my website.
Steve Chambers developed a hardware circuitry modification for webcams that allows them to take exposures of arbirtary duration, thereby bringing webcams to the world of astrophotography. Capturing Deep Sky Images with a Modded Webcam on a Mac Introduction
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