spirited

There is a so called "Composite Sync" signal on the 23-pin Amiga video connector. If a television does not support RGB it picks up the "Composite Sync" as composite video and displays a black and white picture. So it will display something even if there is no RGB support in the TV.

When a TV displays the RGB signal from the 23-pin Amiga video connector, it uses the Analog Red, Analog Green, Analog Blue AND Composite Sync signals to build up the picture. The video connector also has a Horizontal Sync and Vertical Sync signal which is used for monitors with a 9-pin RGB connector.

Look up Hardwarebook on google. Under "Connectors" you will be able to find the pinouts of the Amiga video connector and Scart. You can also find the video connector pinouts in a lot of original Amiga manuals, for example the Amiga 500 owners manual.

Here is some advice how to build a 23-pin Amiga video connector to Scart RGB adapter. Connect the following:

RGB:
Amiga Pin 3(Analog Red) to Scart Pin 15 (RGB Red In)
Amiga Pin 4(Analog Green) to Scart Pin 11 (RGB Green In)
Amiga Pin 5(Analog Blue) to Scart Pin 7 (RGB Blue In)

RGB GND:
Amiga Pin 16(Video Ground) to Scart Pin 13 (RGB Red Ground)
Amiga Pin 17(Video Ground) to Scart Pin 9 (RGB Green Ground)
Amiga Pin 18(Video Ground) to Scart Pin 5 (RGB Blue Ground)
(Note that Pins 16-20 on the Amiga are all "Video Ground", so you don't have to use 16, 17 and 18 as I wrote above, you could also use just one pin or some other combination of 16-20)

Composite Sync:
Amiga Pin 10(Composite Sync) to Scart Pin 20 (Composite Video In)

Composite GND:
Amiga Pin 19(Video Ground) to Scart Pin 17 (Composite Video Ground)
(again.. Note that Pins 16-20 on the Amiga are all "Video Ground", so you don't have to use 19 as I wrote above, you could also use some other pin from 16-20)

Also, IF you would like to have the sound from the Amiga connected to the same Scart so that your television speakers would output the Amiga audio, then you need to do the following:

Take a stereo RCA cable. Cut the connectors from the other end and strip the ends open. There are two wires inside and you need to separate them. They should not be in contact with each other! The wire that is in the middle is the one that has the audio signal(+), and the one on the outside is the signal ground(-). (I put the + and - symbols there so that everyone would understand and I'll also use it later You could ofcourse also make your own RCA cable, but just buying one and cutting it is usually cheaper, faster and easier. The RCA cord that has a RED RCA connector on the other end is the RIGHT channel. The cord that has either a BLACK or WHITE RCA connector on the other end is the LEFT channel.

RIGHT channel.
+ to Scart Pin 2 (Audio In Right)
- to Scart Pin 4 (Audio Ground)

LEFT channel.
+ to Scart Pin 6 (Audio In Left)
- to Scart Pin 4 (Audio Ground)

Note that signal ground(-) from both left and right are connected to the same pin on the scart connector.


If someone uses this information for making any adapters, please be sure to check that all the pins above are correct before doing anything, cause there might always be typos. Also if you end up damaging your amiga or TV or anything else or your house burns down or something else because of you following my instructions, I won't be held responsible. Following my instructions here is on your own risk!