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Posted Thu May 17, 2018 2:37 PM
Posted Fri May 18, 2018 1:13 AM
If you look at the schematic diagram in the 7800 archive here on AA in the bottom right hand corner are 4 resistors (R10, 11, 12, & 13). If it is composite video you are after then unless I am reading the schematic wrong I would think you could pick it up from the common end (not the end that goes to u3) of either of those.
If you are looking for somewhere local to that to pick up the 5V then I assume U3 will be close by so you could pick it up from pin 14 (immediately the right of the indent on the top of the IC) but perhaps the best place would be on the output pin of the 7805 voltage regulator (right leg when looking at the front (side with black body, not the all metal side).
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