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Topic: I think I destroyed my SMD Uno (Read 2868 times) previous topic - next topic

Nick Gammon

Nov 10, 2012, 12:03 am Last Edit: Nov 10, 2012, 12:56 am by Nick Gammon Reason: 1
I have a SMD Edition Uno. It used to work. It no longer accepts uploads.


  • I tried the loop-back test. Passed.

  • The +5V and +3.3V pins read correctly.

  • The "on" LED lights up.

  • Attempts to program it via ISP fail with "unable to enter programming mode"



The SMD processor chip will be difficult or impossible for me to remove and replace. Any suggestions? Or just throw it into the bin?

I suppose it could be retained as a USB to serial converter.
Please post technical questions on the forum, not by personal message. Thanks!

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

Coding Badly


Were you previously able to program it via ISP?

Nick Gammon

Yes, previously it worked normally.
Please post technical questions on the forum, not by personal message. Thanks!

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

Jack Christensen

Any idea what might have happened to it? I accidentally programmed the RSTDISBL fuse bit recently. That slowed the whole process right down.
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

Nick Gammon

I suspect static electricity. I'm usually careful but maybe I picked it up when I had a charge.
Please post technical questions on the forum, not by personal message. Thanks!

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

Coding Badly


Do you have a high-voltage programmer?  (Maybe the static discharge flipped the RSTDISBL fuse bit?)

What did you last upload to it?  Does that program still run?

Nick Gammon


Do you have a high-voltage programmer?  (Maybe the static discharge flipped the RSTDISBL fuse bit?)


I do, but I don't think I can program it without removing the chip. Or can I? Atmel warn against attempting that with chips on boards, but maybe it would be OK. I suppose it couldn't get any worse.
Please post technical questions on the forum, not by personal message. Thanks!

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

Nick Gammon


What did you last upload to it?  Does that program still run?


I'm not sure. I do so much ad-hoc testing of stuff for the forum it could be practically anything.
Please post technical questions on the forum, not by personal message. Thanks!

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

James C4S


I'm not sure. I do so much ad-hoc testing of stuff for the forum it could be practically anything.


From compiling stuff for the forum, I have already killed one of my dip based ATmegas.  Maybe you burned up a flash cell (or two)...
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

Coding Badly



Do you have a high-voltage programmer?  (Maybe the static discharge flipped the RSTDISBL fuse bit?)


I do, but I don't think I can program it without removing the chip. Or can I?


I forgot about the stuff connected to RESET.  The Atmega16U2 may not survive the 12 volts or the auto-reset circuit may interfere.

Good news!  (and very bad)  You have a new oversized USB-to-TTL-serial converter.

Nick Gammon

Ah well. At about the same time my USBtinyISP stopped working. Not a good day. :)
Please post technical questions on the forum, not by personal message. Thanks!

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

CrossRoads

Nick,
I can replace that chip for you. I have a hot air station, and even a couple of chips I think.
The TQFP chips, not the leadless chips - board looks like it has pads for both?
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

cjdelphi

what happens when using usb/arduino IDE? 

CrossRoads

Need to fill out that question some more cjdelphi, you are mixing things together a bit too much.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

cjdelphi

I'm curious how on earth he killed one, i've tried (by accident) several times lol

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