Scanned the forum for this subject, but failed to find answers – apologies if I missed them.
Basically, I get nothing on my composite video monitor and I am wondering if the Arduino is generating a proper signal.
am trying to simply execute the tvout demo DemoNTSC., having purchased a current model Uno for the purpose, loaded tvout library, loaded DemoNTSC. Compiling resulted in many java messages but no errors per se, so project did load into Uno. Used the correct pins (7 and 9) with resistor divider as recommended.
The output waveform from the Arduino (see attached) is simply a 60-hz(ish) refresh pulse, with a 4.7 usec sync (0 V) and then a 57 usec pulse at 5v. No video data are apparent on that 5v pulse.
Comparing to standard NTSC waveforms, this lacks a front porch, back porch, and color burst. (See http://web.mit.edu/6.111/www/f2008/handouts/L12.pdf, p.8)
The Arduino output is also at 5v, vs. the specification at 1v p-p
Should the waveform I’m getting be sufficient? If not, any ideas on what is failing?