Reply To: Standalone Rpi source

Forum Digital source Standalone Rpi source Reply To: Standalone Rpi source

#1962
G600
Participant

Yes, it’s an old 1.1 Ultrabib, set for about 400 mA dissipation (I have bypassed the 4.7r with a parallel 10r since I made the picture, so the 1.3v drop divided by 3.2 Ohm = 407 mA).

But with 4.7r I had almost the same drop of 1.3v, so I’m not in line with the dissipation you wrote, it must have been 270 mA.

But I will try another reg tonight, one of my assumption is that it’s oscillating / not supplying the fast transients that may be needed by the FIFO.

The other idea is a grounding problem. Let me test that and report back, thank you very much for brainstorming with me!

  • This reply was modified 1 week, 4 days ago by G600. Reason: typo
  • This reply was modified 1 week, 4 days ago by G600.
  • This reply was modified 1 week, 4 days ago by G600.