i am a newbie and i started using arduino from maybe a week.
The arduino uno was working fine until yesterday i decided to connect 14.8v 8000mah to to the vin pin of the arduino. it still worked for some time after but then i couldnt upload to it. i tried everything fromm changing ports to changing data cables. it doesnt detect the arduino port in ide now. the board is a genuine one. ill reply asap for further info. the arduino is still able to run off the old code. i am just not able to upload new code.
Things point to you having damaged the Arduino.
Did you have anything connected to the 5V or 3.3V pins?
Did you have anything conneced to any of the GPIO pins?
yes. i had l298n motor driver and hc05 bluetooth module both connected to the 5v pin. sorry, but i do not know what gpio is.
14.8V was way to much. You may have burned out the 5V regulator.
Is the green power LED ON?
yes its on
Always show us a good schematic of your proposed circuit.
Show us good images of your ‘actual’ wiring.
Give links to components.
If you disconnect everything from the UNO and connect it to the PC it sill won't be detected?
i have a schematic but i cant upload it because im a newbie
and i dont have links bc i visited in person to get the parts from a shop
yes
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Then as @LarryD pointed out it's damaged.
Not sure how it happened but connecting 14.8V was not a good idea.
is there anything i can do like uploading code wirelessly i have hc05 and hc06.
i also have nodemcu esp8266 but i donot know how to install the drivers for it.
i really need to do this as i have to submit this project on the 26th
It seems to me that the max without shield is 12 V. Not sure but I remember I had to use a shield to connect 24 V DC motor
I see you have now reached the "basic user"/ trust level 1 status that allows you to attach images.
I recommend you to follow through on posting the schematic. This might allow the forum helpers to provide advice on how you can avoid damaging other boards (or even further damaging your UNO) in the future.
It is impossible for us to know which parts of the board were damaged, but if the damage was limited to the USB interface on the board that produces the serial port then there are ways you can use a separate piece of hardware to bypass the USB interface on the board and upload sketches to the ATmega328P microcontroller.
That said, it will not be as convenient to work with the board this way so you might consider buying a replacement.
The fact that the previous program appears to still be running on the board is a sign that the ATmega328P is still in at least a semi-functional state.
It might be possible to upload via a hc05 or hc06, but this would be an advanced endeavor. I think it is better to consider other options. The best option is a USB to serial adapter module or cable (sometimes referred to as "FTDI"). Something like this:
These are available from most of the same places you would purchase an Arduino board or accessories. They are a useful tool to have even for purposes other than uploading sketches.
They are available in various forms and with various USB chips. You don't need to get the style like in the picture above. I do recommend you get one which uses the standard "FTDI header" pinout:
- DTR or RTS
- RX
- TX
- VCC
- CTS
- GND
That will allow you to plug the adapter right in to boards that use this standard pinout such as the Arduino Pro Mini. If you get an adapter with a non-standard pinout, you would need to use a mess of jumper wires to adapt it to the standard pinout. Some adapters don't even break out the DTR or RTS pin, without which you will need to manually reset the microcontroller at just the right time on every upload.
It is also possible (though less convenient) to use another Arduino board such as an UNO as a USB to serial adapter. But it doesn't sound like you have a spare UNO and I'm not sure whether your ESP8266 board will be usable for that purpose.
Another alternative is to use an ISP programmer to upload sketches. You can also make a spare Arduino board into a DIY "Arduino ISP programmer".
We can probably help you with that.
Do you see a port for the board in the Arduino IDE Tools > Port menu when you connect the board to your computer with a USB cable?
Which operating system are you using (e.g., "Windows") on your computer?
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