These are samples of a CMOS 4000 series based monochrome video synthesizer now on my breadboard. The synthesizer consists of a couple of oscillators build from CMOS ICs (one for horizontal lines, one for vertical lines), an LM1881 video sync separator, a divider, and a handful of other ICs to format the sync signals. The first is the raw signal, and the second shows the video synthesizer integrated into a video mixing situation.
