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K3CCDTools - Connecting SC modified webcam to Serial Port
Standard SC modified camera is controlled via parallel port. However, the new notebooks in state of art market lack of parallel or serial ports.
The good news is that it is possible to control standard SC modified camera via serial port. Those who have not serial port on their computer can use USB to Serial Port adapter. USB to Serial Port adapter is compatible with standard serial port only on software level, but it is sufficient for using this adapter with K3CCDTools.
SC 2.0 modified cameras require 4 output signals which are used for controlling them. Standard hardware serial ports have possibility to control 3 output signals, while software compatible serial ports (e.g. output of USB to Serial Port adapter) offer only 2 output signals. Another problem of serial port is that output levels of serial ports are -12V and +12V, while parallel port has 0V and 5V. That's why a direct connection of SC modified camera to the serial port could damage the camera which is built for 0V/5V signal levels.
There are several ways of converting serial port signals to the levels of parallel port signals. One of them is to use transistors (the same principle is used also in Steve Chambers' serial to parallel port adapter).
The following adapter for serial port is compatible with SC modified cameras and also with commercially produced cameras like SAC7, SAC7b, ATIK - ATK-1C, ATK-1HS, ATK-2HS.
The transistors convert the signal
levels to the levels suitable for camera and also invert
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Last Update: 29.07.2004