Electronics > Beginners

Can't get SSD1306 OLED working on custom PCB

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Nusa:

--- Quote from: Majek Ondrovic on April 07, 2019, 07:24:43 pm ---
--- Quote from: Nusa on April 07, 2019, 05:16:11 am ---
--- Quote from: Majek Ondrovic on April 07, 2019, 02:56:27 am ---
--- Quote from: Nusa on April 07, 2019, 02:36:16 am ---RST needs to be held low long enough to be recognized when power is first applied, and then allowed to go high. The capacitor is more than just a filter in this case.

--- End quote ---
Aha! very interesting, thank you. I'm glad I asked

--- End quote ---
For extra credit, see if you can figure out what the diode is for.

--- End quote ---

Hmm I'm not sure.. Does it discharge the cap quickly but allow it to charge up slowly, or something like that?  :-//

--- End quote ---
Yup, but only in the power-off situation. That ensures the power-on reset circuit gets reset.

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