OpenVideoModulator is an Open Hardware adapter that converts an RGB video signal to Composite and S-Video by SukkoPera.
OpenVideoModulator is an Open Hardware implementation of a small circuit found on the Amstrad CPC Wiki that is able to produce a composite video signal from separate red, green and blue color component signals (plus sync). Since it uses the AD724 encoder, it is also able to produce an S-Video (Y/C) signal and it supports both the PAL and NTSC standards.
It has a compact form factor, a low component count and it only requires a +5V power supply. This makes it useful with old computers that do not have a native composite or S-Video output, like the Amstrad CPC or the Commodore Amiga 500 (which actually has a composite output but it’s only black & white). It also tries to maintain the smallest possible form factor, which might allow for an internal installation.
Schematic diagram
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