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Rpi 3b + keeps eating as cards
#1
I have a 3b+ and have a 7” display hooked to it. The only non powered usb is the keyboard. Everything else runs through a 12 volt usb hub. I get low power on boot and often it corrupts the boot file and I have to reimage the card. The power supply is a good supply. I think the limiter and the fact it also powers the monitor could be the issue? Any suggestions. Or do you think something else is causing it? I have had this issue on and off. Do you think the monitor is drawing to much power? Should I wire the supply to the 5v gpio side so it doesn’t go through the limiting chip?


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#2
(07-11-2019, 06:39 PM)festeraeb Wrote: I have a 3b+ and have a 7” display hooked to it. The only non powered usb is the keyboard. Everything else runs through a 12 volt usb hub. I get low power on boot and often it corrupts the boot file and I have to reimage the card. The power supply is a good supply. I think the limiter and the fact it also powers the monitor could be the issue? Any suggestions. Or do you think something else is causing it? I have had this issue on and off. Do you think the monitor is drawing to much power? Should I wire the supply to the 5v gpio side so it doesn’t go through the limiting chip?


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Before looking at a new power supply it might be worth looking at the cables. Lots of USB cables are a bit skinny and can cause a lot of voltage drop during power spikes.

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#3
Thanks. I have a good solid cable. One of the times I was using a 110 charger with high output but I was running it through a modified sign wave inverter. Maybe it was dirty power. I think I am going to use the same 4 amp 5v buck converter I have and power a gpio pin.


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