Fried my arduino

[tim_n]

Had an arduino uno linked up to an RFID sensor and door lock.  Power was a bit sketchy over Christmas and whilst it powers up, can't seem to get it to do anything.

 

Anyone got experience in troubleshooting them?  Not sure if it's something I can easily fix.  I'm replacing it with a Tosduino nano anyway but a shame to loose a development board

[Mark Steward]

If you're lucky, you may just have fried the I/O pin, and be able to use others.  If you can't flash it, you'll want to try another chip.

Before you do that, you should be aware it's a bad idea to connect an arduino directly to a door lock.  Relays dump a higher voltage when they demagnetise and this can fry anything attached unless you have a diode to protect it.

Mark

On Wed, Jan 9, 2013 at 10:37 AM, tim_n <tim.n...@gmail.com> wrote:

Had an arduino uno linked up to an RFID sensor and door lock.  Power was a bit sketchy over Christmas and whilst it powers up, can't seem to get it to do anything.

 

Anyone got experience in troubleshooting them?  Not sure if it's something I can easily fix.  I'm replacing it with a Tosduino nano anyway but a shame to loose a development board

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[Ben Barwise]

Is it a DIL version one just swap the 328, or if its an SMD one (although way more laborious than buying a new one) its not to hard to remove the IC with a hot air gun and put on a new one with an iron and tweezers.

then re-load the bootloader onto it through the TX and RX pins with an AVR programmer or another arduino UNO.  

http://arduino.cc/en/Tutorial/ArduinoISP

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[Ben Barwise]

I mean through the ICSP connections not TX and RX !!!

[Ugo Riboni]

You can also buy 328s with the Arduino bootloader already flashed, they are not that much more expensive IIRC, and save a lot of fiddling around.

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[Martin Klang]

The Uno is surface mount, right?
I would try reloading the boot loader on the old chip first.
It might have lost it or the fuse settings if it suffered a voltage spike.

/m

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[Ugo Riboni]

Uno was made both versions: SMD or with replaceable AVR chip.

The SMD version was made during a period when there was a shortage of the through hole part to keep production going. It's explained here: http://arduino.cc/en/Main/ArduinoBoardUnoSMD

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[Ben Barwise]

I was talking about this one

http://arduino.cc/en/uploads/Main/ArduinoUnoSmd.jpg

it comes with footprint for both SMD packages. The bigger footprint is easy to re-solder that mini package would be much harder to solder.

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[tim_n]

I used a relay (with diode) kit.  It was the fact we kept getting brown outs and the mains was on/off a lot I'd assume.

 

Maybe I'll bring it into the space on a tuesday night?

[Necati]

I will be in the hackspace in an hour and also on Monday evening for NJA meeting. I have a Atmel chip with arduino bootloader  you can swap and see if that is the only fried component.

Necati

[tim_n]

Hi Necati - very kind - will try pop in Monday.

[tim_n]

Half dead, off work today so thanks for the offer but it'll have to wait for another day :(

[Necati]

Just in case you might be able to make to the next one. We have NJA meetings every 2 weeks on Mondays. 

Necati

[tim_n]

I work about 4 mins by Boris bike. I'm much aggrieved to have missed out on the etching session!