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Arduino UNO Question ??

Former Member

Heyy.... I just brought Arduino UNO starter kit few months ago..... Now my arduino does not even work if I plugged to the USB port and uploaded my sketch..... It says port com not found and I even get some electric shocks from the small chip which says 504L on the arduino microcontroller if I plugged the USB into the Arduino UNO R3........ For past few months, it was working really well but all of a sudden it stopped working and even if I plugged the USB over arduino the LED'S does not blink at all... So what would you suggest me to do in order to bring life back to Arduino ????

Thanks

  • 0

    I dont have an answer for your problem but i want to ask your Arduino is an original one or a Chinese clone? Also what kind of projects did you use it for?

  • 0 in reply to dtsartsanis

    My Arduino is an original one ....... I just used for LCD projects ......

  • 0

    Hello Sarah,

     

    it sounds strange that even if you are using a clone (what is a clone of something that is a clone of himself ?) your board stop working at all. I suggest to try the following troubleshooting at least to have an idea and focus the problem with more precision:

     

    1. If you have not done yet, try plugging the Arduino in another usb computer or - better - power it with a USB cable connected to a simple wall-mount charger (like the ones that are used by mobile phones). Does it works? If it works it is very probable that the problem is for some reason in the PC instead of the Arduino; in this case I am not sure if you should be happy or sad image
    2. Try to replace the USB cable, it seems another stupid solution but for a reason that I have never discovered a couple of my USB cables started to show this strange behaviour.
    3. if nothing happens and you have a tester or at least a LED, try to see if there is current to the GND - 5VC pinout of the board.
    4. If possible, try to power the Arduino with the external plug without connecting the USB cable. Use a 9-12 V battery pack if you have or a wall mount power supply of the same power (1A - 9 VCC should work in someway).

     

    If the processor or other components are not broken, the Arduino should have retained the last sketch you have uploaded with success.

     

    Please report what's happen and we can try other ways if the problem is in the Arduino USB.

     

    Cheers.

  • 0

    Hi Sarah,

    Do any of the LEDs on the Arduino light up? When you go to "Tools" on the Arduino IDE and click on Port do you get a list of choices? Have you tried other COM choices? There should not be any components on the board that you can get a shock from. At 5 volts max this is below skin sense level, unless you have an open cut in your skin. If you are getting a shock it may be static and coming from your body to the board. If this is the case you may have damaged the board with the static. See if someone you know have another arduino that you can try to rule out your computer and cable as the source of the problem. If the other arduino works and yours doesn't then it is probably damaged. The only easy fix to a damaged board is to try replacing the Micro Processor chip. If you decide to try this, make sure you get a chip with the bootloader pre-installed.

    John

  • 0 in reply to jw0752

    John, I saw that with the last ide bootloader uploads in seconds on any AVR328p... I appreciated this aspect

  • 0 in reply to balearicdynamics

    Hi Enrico,

    That is very good to know. I just downloaded the latest IDE but I have not taken the time to explore it yet. Boy am I every going to miss the old procedure to install the bootloader (sarcastic).image

    John

  • 0 in reply to jw0752

    Hi,

     

    frankly I had to put a bootloader on avr328p and simply from the menu I put upload the bootloader

    That's all. Just a couple of weeks ago.

  • 0 in reply to jw0752

    Reply II

     

    I took a look to the lab desk ... Ehm ... image it's me coming crazy ! I forgot a detail, I have an original AVR programmer from Atmel that I use when I write firmware without the bootloader image image image It's simple because I have connected the programmer to the ISP connector and pressed a button.

     

    But... when I was without this tool I have simply put a clock and a couple of capacitors on a breadboard, connected the arduino as bootloader to the chip on the breadboard and the result was the same, just a minute. If it sounds useful I have already the scheme. Should only search where it is.