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Topic: Extremely urgent -Arduino UNO r2 not detected..... (Read 2612 times) previous topic - next topic

qwerty156

Oct 13, 2012, 07:00 pm Last Edit: Oct 13, 2012, 07:03 pm by qwerty156 Reason: 1
Hello!
I was using my arduino UNO (official) r2 for a robotics project. After a night of hard work, i continued my work in the morning but the arduino would  not get detected. I had used the same usb cable last night.

I would really appreciate the help as this is my 3rd arduino and being a student in a poor country (india) this is the last arduino i can afford to break :(

Here are the symptoms:
1) The Arduino is completely NOT detected. I have tried this on 2 laptops, both mac and win7. When the arduino is plugged in, the laptop does not detect ANYTHING!
EDIT: On the last night that this UNO was working i randomly got this message a couple of times : avrdude: stk500_getsync(): not in sync
but the issue usually resolved it self by plugging/replugging/reset button.
2) I have tried it with 2 USB cables. The USB cable which was working before has also stopped working
3) None of the uC's i.e 'MEGAU8 and 'MEGA328P get warm
4) Since the arduino is not detected at all, the loopback test cannot be performed
5) The previous sketch runs fine
6) When i connect the arduino to power (usb or external) the on board LED 13 blinks (i think it blinks 3 times though not sure)

Help is much appreciated as i have many competitons coming up :/

sirbow2

lol. you broke the other two? open device manager (control panel) and right click any where on one of the devices + click detect new hardware. migth be detected then. but since yo tried it on so many, i doubt it.

maybe a defective board as you say a cable you used topped working
http://dduino.blogspot.com all my Arduino/electronic projects!!!

{NEW} Getting Started, Learning, Reference + FAQ PDF!!:
[url]http://ar

qwerty156

Thanks for taking the time to reply but your reply was not very helpfull :/

eried


Thanks for taking the time to reply but your reply was not very helpfull :/


Killing so many arduinos is not normal, what are you doing with them?
My website: http://ried.cl

Nick Gammon


Thanks for taking the time to reply but your reply was not very helpfull :/


Please describe how you had these Arduinos connected to other devices. A wiring diagram would help. If you cannot afford to destroy a lot of Arduinos you should probably find out what you are doing wrong with them.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

qwerty156

The first and the second arduino were broken in seperate projects looong time ago.
Anyway, i had connected the arduino to a l293 motor driver - standard wiring nothing special.
Never even once was 'magic smoke' released from any of the components.
The whole robot still works as intended but i am unable to program it.
I think that the megau8 is at fault here....
The TX light faintly glows.
Also, i tried putting the arduino into DFU mode after it stopped working but i was unable to find how  to set the UNO r2 into DFU mode. I tried shorting the first two wires of the ISCP connector as shown here:
http://arduino.cc/en/uploads/Hacking/Uno-front-DFU-reset.png

but the arduino is still not detected at all.

Nick Gammon

You should be able to bypass the USB chip and program via the ICSP header. You need a programmer. You can buy something like the USBtinyISP for around $20, or just use another Arduino as the programmer.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

eried


You should be able to bypass the USB chip and program via the ICSP header. You need a programmer. You can buy something like the USBtinyISP for around $20, or just use another Arduino as the programmer.


Or 3.5 usd :D

http://www.ebay.com/itm/USBasp-USBISP-3-3V-5V-AVR-Programmer-USB-ATMEGA8-L-/140763404046?pt=LH_DefaultDomain_0&hash=item20c627170e
My website: http://ried.cl

qwerty156

http://www.onlinetps.com/shop/index.php?main_page=product_info&products_id=596
Would this work?
or even this one:
http://www.onlinetps.com/shop/index.php?main_page=product_info&cPath=74_127&products_id=603

Nantonos


Or 3.5 usd :D

http://www.ebay.com/itm/USBasp-USBISP-3-3V-5V-AVR-Programmer-USB-ATMEGA8-L-/140763404046?pt=LH_DefaultDomain_0&hash=item20c627170e


For those of us who are slow on the uptake, how is the 10-pin cable on that device connected to the 6-pin ICSP header?

Nick Gammon

Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

Riva

Does it have to be that make of scissors or will almost any make do.  XD

eried

http://www.ebay.com/itm/USBASP-USBISP-AVR-Programmer-USB-10-Pin-Convert-to-Standard-6Pin-Adapter-Board-/180980285082?pt=LH_DefaultDomain_0&hash=item2a2343fe9a

There is a small adapter
My website: http://ried.cl

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