vga to scart

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This is a simple circuit to connect your VGA graphics card to your TV. The advantage of using RGB over S-Video is superior contrast and clarity. The schematic of this circuit is taken from Tomi Engdahl's site. The circuit basically XORs together your horizontal and vertical synchronization signals to create a composite sync output, and adjusts output for input polarity. By setting the resolution and timings on your VGA card correctly, it i s poss ible to gener ate a signal that th e TV will accep t. This circuit works for both PAL and NTSC signals, just adjust the timings in software accordingly. To see which timings to use, this site has a list. If it doesn't work, experiment a bit. The resolution should normally be 720x576 for a PAL tv. The refresh rate should be 50 Hz interlaced. Use Powerstrip to set the timings after you've set the resolution to 720x576. Schematic Board The board is made in Eagle PCB. It's small en ough to fit i nside a D-sub cas e, which is very neat. The resistor packa ges are 0603. It was the only (well easiest anyway) way to make this circui t fit i nside a D-sub cas e. If you want to etch this board yourself, you can download the Eagle schematic and board files. EAGLE PCB can be found at the Cadsoft website. Note that the board file has an unconnected via, the top left one. Connect your +5V supply here. Comp onent list: N ame Val ue P ac kage C1 22 µ http://fribok.blogspot.com/ 

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8/6/2019 Vga to Scart

http://slidepdf.com/reader/full/vga-to-scart 1/3

This is a simple circuit to connect your VGA graphics card to your TV. The advantage of using RG

S-Video is superior contrast and clarity. The schematic of this circuit is taken from Tomi Engdah

circuit basically XORs together your horizontal and vertical synchronization signals to create a cosync output, and adjusts output for input polarity. By setting the resolution and timings on your

correctly, it is possible to generate a signal that the TV will accept. This circuit works for both PA

signals, just adjust the timings in software accordingly. To see which timings to use, this site ha

doesn't work, experiment a bit. The resolution should normally be 720x576 for a PAL tv. The ref

should be 50 Hz interlaced. Use Powerstrip to set the timings after you've set the resolution to 7

Schematic

8/6/2019 Vga to Scart

http://slidepdf.com/reader/full/vga-to-scart 2/3

8/6/2019 Vga to Scart

http://slidepdf.com/reader/full/vga-to-scart 3/3

http://fribok.blogspot.com/