Hi, I am using a Maker Focus 5V - 8 digit-7-Segment display using a MAX7219 in an arcade I'm making. The problem I am having is that after 10-12 seconds, the display shuts off. I tried placing a .33 uF cap across the power supply, same thing. I tried placing a 330 ohm resistor in series with the di…

[image] brinelec: (less than 1 volt). that’s a lot, try changing power supply for a more stable one

[image] brinelec: Does anyone have a suggestion as to what is happening? Not without a proper description - with diagram and preferably a clear photograph - of what you are actually doing. :roll_eyes:

Please, post your sketch so that we can check that you have intialized the MAX7219 properly.

ARCADE NANO_FORUM Model (1).pdf (274.6 KB) ARCADE SCOREBD_V1.pdf (16.1 KB) Here are both the sketch and the portion of the nano & led wiring.

Why you have +5A (what does it even mean?) and it is connected to Nano VIN and also has a capacitor to +5V?

The schematic is a bit confusing - what exactly is the purpose of the relays? Is there a 2nd nano somewhere? [ARCADE NANO_FORUM Model]

".pdf" is not a suitable image format. :roll_eyes:

[image] brinelec: I keep a meter on the 5VDC and there is little flucuation. (less than 1 volt). That's the supply drooping far too much. 0.05V variation is more what you should tolerate. Either the supply or the wiring isn't up to it. Is a regulator over-heating and shutting down perhaps? …

[image] Paul_B: ".pdf" is not a suitable image format Huh?

8 Digit - 7-Segment display turns off after 10 seconds

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groundFungus July 11, 2021, 5:48pm 6

Read the forum guidelines. Post your test code in code tags. Use the IDE autoformat tool (ctrl-t or Tools, Auto Format) to indent the code for readability before posting code.

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8 Digit - 7-Segment display turns off after 10 seconds

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