I accidently put the wrong battery which is 4.8v to my ESP8266 NodeMcu V3 and a component called "C106 " Blew up. My ESP8266 works when I plug it to a port in my computer, But If I tried to program it using the Arduino IDE it doesn't appear in the ports section. In an application called Device Manger it says that the ESP8266 is called: Device Descriptor Failed And a notification pops up on my computer saying Unknown USB. Does anyone know how to fix this? Note that I maybe connected the battery 4.8v+ to gnd and battery gnd- to vin
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not sure what you call C106 but usually when one component blows you can't trust the rest of the board any more. There might be other invisible damages to the tracks or other components that lead to non robust operations...
I would recycle the board and buy a new one.
Here is what C106 looks like:
mine is already blown up.
I really want to try to fix it instead of buying a new one.
I would be so grateful if you can help me.
Seems like a 10uF tantalum capacitor on the input or output of that voltage regulator next to it.
If the board doesn't work with that blown capacitor, then a lot more could be fried.
Most electronic parts don't like battery polarity reversal.
Take the given advice.
Leo..
The esp8266 fully works but it just doesn't get recognized in the arduino IDE. But it takes power and the esp8266 blue led works. And the pins work. So what should I do next?
106 is the value in pF (10x106) so indeed a cap of 10µF
You would need to find the diagram and see what's it's connected to, may be a decoupling capacitor
you need to buy a similar capacitor (ideally surface mount , tantalum) and solder it in place. if you find a Ceramic one it won't be polarised and so you can't get wrong soldering it.
J-M-L is correct, it looks like it is a decoupling capacitor on the power regulator. If it has blown, it won't remove "noise", If it has shorted, then the power is probably not regulated down to 3.3v correctly, in either case not being able to program will be an issue. Try the following checks.
Pin "Vin" is connected to the internal voltage regulator (allowing an input voltage of 4.75V to10V to be regulated down to to 3.3V). Test pin "Vin" against a "gnd" pin with a multimeter set to DC volts to see if you are getting the correct 3.3.v. Alternatively, an external voltage source of 3.3V can be directly connected to any of the NodeMcu's 3V3 pins to power the board. If you can provide external power to one of these pins from a 3.3v regulated supply (say from another board) and it still works ok, then it's worth having a crack at soldering in a new capacitor. They are non polarised, so doesn't matter which way round they go.
I would just use the ESP and upload using any kind of programmer, manually setting the boot-mode and consider that not just that capacitor malfunctions but also the onboard USB-TTL converter. Replacing the capacitor is probably going to be more trouble than it's worth unless you have one laying around already, and will most likely not result in the port showing up. Still i guess adding an extra capacitor on the 3.3v line (edit, actually work out if it is on the 3.3v or 5v line where i now suspect it probably is/was and all 5v parts will be faulty) will probably be a good idea, but for that it doesn't need to be on the exact same spot on the pcb, and can also be a THT version which will be a lot easier to find. You can probably leave the old one on the board, since the board does work at the moment.
Hi,
what is your board model?
New ESP8266 NodeMcu V3
That sentence does not seem consistent.
From this image, that 10uF cap is on the input of a 3v3 regulator so it makes sense that it was blown with reversed power. I'd remove it before I applied power again. Might work okay for a short test but definitely needs to be replaced if the board works otherwise.
Hi,
this component that I marked in orange, may be damaged.
It is the ESP <---> USB interface. CH340G
The regulator marked in pink may be OK as the ESP is still working.
A new board is US$3.00
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Where and how did you connect that "wrong battery" ?
I connected the +(4.8v) to vin and gbd to gnd. I though it was a different battery.
Connecting 4.8V to Vin can't blow anything up. There must be something else...
Polarity reversal blows up capacitors.
Did you swap the battery terminals.
If so, then the 3.3volt regulator might have protected the ESP8266 module.
But I fear for the CH340 USB<>Serial chip, which is directly connected to V-in.
Leo..
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There is a big chance i have connected the 4.8v to gnd and battery gnd to esp8266 gnd. My home later smelled like smoke for 1 hour.