CoCo2 Composite Video Out Board with Sound
This circuit uses the MC1372 video modulator ic to convert the component outputs of the MC6847 into a composite signal. This is the same chip used in the RF modulator box in the Color Computer.
I have tested this circuit and it works pretty well. Here is the schematic.
CoCo2 composite video board schematic
And the board layout.
And here is a newer revision of this board with adjustable output voltage levels and an optional (very clear) B&W output.
It does a decent job, but of course I’m looking for ways to improve it. The switch is for Color/B&W modes, this could simply be jumpered instead, or wires could be run to a switch on the case.
Close up of plug-in headers…
Back view of the installation…
Output on small, low-res CRT…
1 thought on “Color Computer 2 composite board”
omg i just gotta get one of those