SCART adaptor for IBM PC

EE 44 March 1987 SCART ADAPTOR FOR IBM PC As a growing number of colour TV sets come with a SCART input, many owners of an IBM PC will have toyed with the idea of using a SCART compatible set as a CGA-driven, medium- resolution, RGB display. Well, here is the adaptor circuit to do just that! Medium and high-resolution RGB monitors with TTL- compatible monitors are gener- ally recognized as costly devices. It is not suprising, therefore, that many an owner of an IBM PC or PC compatible starts wondering about driving the video and sync circuitry in a modern colour TV set with the TTL signals from the CGA (colour graphics adaptor) in the computer. After all, the resol- ution of the typical TV set should be adequate for the 320 x 200 pixels from the CGA. Considerable difficulty, how- ever, arises from the fact that the CGA composite video out- put supplies a NTSC signal (American TV standard), rather than a PAL signal as required for most European TV sets. The solution to the above pr...