Hi, there seem to be far too many nano everys burning out for whatever reason. Have these problems been sorted yet, or do we just have to take a chance?
Problems seem to be usb power related - causing boards to burn out.
Thank you
Can you point to Topics where this has come up?
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Show us, it's news to me. It would be a major failure if the USB power was the issue, I do believe folks not observing what pins are what might power VIN and USB at the same time and that is generally a no no.
First I've heard of it. I've been tinkering with a couple of Everys and bare DIP 4809s for months now and haven't had a Lucas smoke release event on any of them.
I've used a least six Nano Every boards in various projects, and never had this experience. The three pack from the Arduino store, or Amazon is a good way to purchase them.
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Hi it was in the nanao every "issues" .
As i said before I found alot of people having trouble with boards suddenly overheating and no longer being recognised by the computer.
This was found under the nano every section of this forum.
Yes, it probably is shorted pins or crossed power, but then again..
All I saw there was either a typical inexperienced user or some other kind of fool. The experienced respected users asked for proof and none was forthcoming.
I did not see any kind of pattern of boards burning out, TBH not even one but I might have missed one.
Can you take a photo of your board and post it here? I have a really big monitor, I'll look and let you know if I see any obvious soldering issues like bridges or such that might account for your woes.
Did you buy them with or without headers?
Links?, I just looked and saw nothing unusual.
Shorted pins? How? 'crossed power', I think we finally have an answer.
After further looking at the datasheet, it says power can be from usb OR vin NOT AND.
The other answer maybe in the pinout. It shows an arrow going inwards for VIN and outwards for 5volts. The fact it worked once and someone got away with it doesent mean it always will.
Where did you see VIN and USB can't be connected at the same time? The schematics indicate that the Nano Every was designed so that VIN and USB can be used together. This allows the user to feed extensive circuitry and the board from one supply, and control said circuitry from your PC through the board.
There's one problem (overlooked by the designers): the parasitic diode in the switching MOSFET in the MPM3610 regulator. As long as external power is present that's no problem, but when the external power is switched off, the USB power will feed the external circuitry (see post #12).
The maximum reverse current is not given in the datasheet of the regulator, but might be lower than the maximum forward current.
Maybe you and I discussed this before, but having VUSB - Vdiode_D2 isn't enough to turn the MPM on with.
Having some external 5V on the "5V" pin is enough - which has resulted in unhappiness.
The MPM3610 doesn't need to be turned on for the diode of the HS-MOSFET to conduct.
Officially the USB port of the PC might be limited to 500mA, but on occasion I've seen my PC put out more than 1A.
Yes, exactly - you don't want it to turn on from a voltage applied to the 5V pin. And it won't from VUSB (or VUSB - Vdiode).
Feeding the 5V pin will have the same result.
I'm sorry, I don't understand.
(This does get people very stirred up for some reason.)
Feeding 5V to the 5V pin WILL turn on the MPM - not good.
Vusb - Vdiode will not.
The damage to the MPM3610 is done by the current that is pulled by the big load in post #12.