DIY VGA to TV Cable

Written by glenn xavier | 13/05/2017
DIY VGA to TV Cable
A MALE VGA 15-pin D-sub connector (vga image by MATTHIEU FABISIAK from Fotolia.com)

VGA cables use a D-sub connector with 15 pins, and carry analogue video signals for red, green, and blue colour channels (RGB), horizontal and vertical sync, and miscellaneous monitor data. Many high-definition televisions support VGA connections to computers, and only require a male to male cable. Televisions and display devices that lack a VGA port may still be able to receive a signal from a computer with an appropriate adaptor.

VGA to DVI

DIY VGA to TV Cable
A DVI-Analog to VGA adaptor (dvi/d-sub adaptor image by TEA from Fotolia.com)

A television with a backwards compatible Digital Video Interface (DVI) port can be driven by a VGA cable with a DVI adaptor. These adaptors are often included for free with monitors and video cards, but can be replicated by connecting the correct pins. DVI-Integrated and DVI-Analog cables both use special pins to carry a VGA's analogue RGB signal. Connect the following VGA pins to a DVI connector:

VGA Pin 1 to DVI Pin C1 -- Analogue Red VGA Pin 2 to DVI Pin C2 -- Analogue Green VGA Pin 3 to DVI Pin C3 -- Analogue Blue VGA Pin 13 to DVI Pin C4 -- Analogue Horizontal Sync VGA Pin 14 to DVI Pin 8 -- Analogue Vertical Sync VGA Pins 6, 7, and 8 to DVI Pin C5 -- Return for RGB signals VGA Pins 13 and 14 to DVI Pin 15 -- Return for Analog Sync

VGA to Component RCA

DIY VGA to TV Cable
FEMALE RCA phono plugs (composite image by Victor B from Fotolia.com)

If a display device has support for Component RCA, a VGA to RCA adaptor can produce a quality picture. Component video is converted from RGB and split into three channels: image brightness, or luminance; the difference between blue and luminance, and difference between red and luma. Some display devices may support both signals, and video cards can occasionally choose between an output of RGB and component video. Attach an RCA plug to each of the three VGA colour signals.

VGA Pin 1 -- Difference between Red and Luma (Pr) VGA Pin 2 -- Luminance and Sync (Y) VGA Pin 3 -- Difference between Blue and Luma (Pb) VGA Pin 6 -- (Pr) Ground VGA Pin 7 -- (Y) Ground VGA Pin 8 -- (Pb) Ground

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