Reply To: Standalone Rpi source

Posted byG600

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16/11/2022 at 15:49 #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 2 years, 1 month ago by G600. Reason: typo
    • This reply was modified 2 years, 1 month ago by G600.
    • This reply was modified 2 years, 1 month ago by G600.