Those adapters provided TTL-compatible signals for use with TTL video monitors of the day. Electrically, it ought to work with a Classic II, but some cable rewiring might be involved.
To the OP: There is no simple circuit to produce TV-compatible composite video from the signals inside a Mac. The bandwidths are quadruple that of TV; the video is progressive (TV is interlaced); and the horizontal sync frequency is too far off. Don't even try.
There are adapters that produce TV-compatible output from, e.g., VGA (within the resolution limits of TV), but they are well beyond what a casual hobbyist is going to be able to reproduce.
Building a circuit that will drive a VGA monitor (at least some VGA monitors, that is) is less doomed. You can start with the circuitry described in http://68kmla.org/files/classicmac2.pdf (see section toward the end, about how to adapt PC hardware for use with Macs). You'll need to add some simple buffers to drive the RGB signals together with the one video signal from a monochrome Mac. Beyond that, it should work.
To the OP: There is no simple circuit to produce TV-compatible composite video from the signals inside a Mac. The bandwidths are quadruple that of TV; the video is progressive (TV is interlaced); and the horizontal sync frequency is too far off. Don't even try.
There are adapters that produce TV-compatible output from, e.g., VGA (within the resolution limits of TV), but they are well beyond what a casual hobbyist is going to be able to reproduce.
Building a circuit that will drive a VGA monitor (at least some VGA monitors, that is) is less doomed. You can start with the circuitry described in http://68kmla.org/files/classicmac2.pdf (see section toward the end, about how to adapt PC hardware for use with Macs). You'll need to add some simple buffers to drive the RGB signals together with the one video signal from a monochrome Mac. Beyond that, it should work.