Most computer graphics cards nowadays does not have a Video Graphics Array connector. Some of them outputs the RGBHV (used in VGA) through their Digital Video Interface. If a graphics card has a DVI-I connector, but no VGA connector, it is likely to output VGA through DVI-I. Here we will show you how you can wire a DVI-I to VGA passive adapter. PLEASE NOTE: This scheme only works for DVI-I connectors. DVI-I carries both digital and analog RGB. DVI-D does not carry any analog RGB signal at all, so it is not possible to convert it to VGA without using an active adapter.
![Diagram Diagram](/uploads/1/2/5/5/125500989/936207235.gif)
DVI-I Pin # DVI-I Pin Name Direction VGA Pin # VGA Pin Name Description C1 Analog red - 1 RED Red video C2 Analog green - 2 GREEN Green video C3 Analog blue - 3 BLUE Blue-video 15 Ground 9 KEY/PWR Formerly key, now +5V DC 15 Ground 12 ID1/SDA Formerly Monitor ID bit 1, I²C data since DDC2 C4 Analog horizontal sync - 13 HSync Horizontal sync 8 Analog vertical sync - 14 VSync Vertical sync 6 DDC clock - 15 ID3/SCL Formerly Monitor ID bit 3, I²C clock since DDC2 Sometimes the DVI Hot Plug Detect should be grounded, sometimes it should be connected +5 V. This varies from graphics card to graphics card, but we recommend grounding it (connecting it to DVI pin 15).
RGB/EGA/CGA/MDA TO DVI(/VGA) CONVERTER 10 1.1 Video Input/Output If possible, always use a DVI output to a monitor from the RGB to DVI(/VGA) Converter, especially with flat screens. This provides the optimum video signal. If you use a VGA output from the RGB to DVI(/VGA) Converter, it must convert the digitized data to analogue values. The interface to VGA Controllers and MPEG Video Decoders is simple: an on-chip logic “XNOR” accepts the available verti. Input Resistance1 Red, Green, Blue 1 M. AD722 RGB TO NTSC/PAL ENCODER SONY MONITOR MODEL 1342 COMPOSITE VIDEO COMPOSITE SYNC TEKTRONIX VM700A WAVEFORM MONITOR TEKTRONIX 1910.