I want to share my experience trying to make an Arduino produce a B/W composite video signal. (That's the yellow RCA-plug one uses for, let's say, Nintendos)
The difficulties in producing this signal on a platform like the Arduino (I am using the Uno with a mounted ATMega328 ยต-chip) arise from the fact that the PAL signal (Yes, PAL! Take that SECAM and NTSC!) expects synchronization-pulses at certain intervals. But the Arduino of course is limited to changes at specific time instants.
