Andrew Davie wrote:I'll join the crowd, though I have little idea what it does :p
Andrew, you'll probably be more interested in the NBTV-to-625 side of it. It takes a standard NBTVA analogue video signal and up-converts it to be displayed on a standard 625 TV with a baseband 625 AV input, most do.
The input can come from a PC playing back a .wav file, an audio CD player/DVD player, any analogue source of NBTV. Though it MUST be to the NBTVA standard.
In addition it up-converts the original Cop McDonald FM SSTV standard to 625, again the source is any analogue audio device.
A single pin on the board determines which mode it is in, if not interested in SSTV you simply wire it appropriately, ditto NBTV. If you want both (not at the same time though!) a simple front-panel switch is all that's required.
For NBTV an off-board DC-restorer/clamp derived from Klaas's design is required, for SSTV you'll need an SSTV FM demodulator as well. These are both quite simple and I plan to improve on the SSTV demodulator in the future.
OK, so that makes five interested bods so far.
Steve A.