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Replace and Re-Flash a Blown Arduino
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Replace and Re-Flash a Blown
Arduino
Written By: Riley Porter
f TOOLS:
PARTS:
• AVR ISP Programmer M)
! • ATMeaa328 (-H
• Arduino microcontroller (1)
• Chip Puller (1)
Optional
• Tweezers SMT (1 )
SUMMARY
When I first started working with microcontrollers, I had an Arduino, a few LEDs, a handful of
DC motors, and very little common sense. :) I learned firsthand that if you did not read
before you wired stuff up, it could be a costly mistake. However during my hardware infancy
not all was a loss. I discovered that with a few tools and a spare Atmel microcontroller, you
can revive a"blown" or "dead" Arduino board.
This project will show you how to remove and replace the Arduino "brain" (ATmega328P uC).
And we will re-flash your shiny new replacement chip with the glorious Arduino firmware.
One thing to note, however: this project will only fix your Arduino if your Atmega328P
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Replace and Re-Flash a Blown Arduino
controller is blown. If any other component is bad on your Arduino then this guide will more
than likely not be helpful. With that said, let's fix an Arduino!
i»i*i!:
:©o
pel »..-... -
Gather up your needed tools. For
this project, we only really need an
AVR programmer and an Arduino.
However to do it "right," we could
use a few specialty tools.
• Chip puller (not required but nice
to have)
• SMT tweezers (or something
else to use as a shim)
• Arduino
• Atmega328P
• AVRISPMKII
• NOTE: The AVR ISP
MKII is my choice of
AVR programmers. There are
others available. I prefer this
one as it's pretty cheap ($35)
and it's also officially
supported by Atmel.
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Replace and Re-Flash a Blown Arduino
First things first. We need to remove the blown Atmega328P from the Arduino board. This
can be tricky as if you do not pull the chip out evenly you end up with a bunch of bent pins
You might be asking yourself, "Why does it matter?" Well, if you know for sure the chip is
dead then it really doesn't. However you should try to remove the chip correctly for
practice.
Pry the tip of the tweezers into the space between the chip and the chip holder. Create a
little gap between the chip and the chip socket then go to the other side and do the same.
Continue this until you have room to insert your chip puller, or until you can easily remove
the chip by hand.
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Replace and Re-Flash a Blown Arduino
Let's now insert the new Atmega328P into the socket on the Arduino board. This is pretty
simple; however there are a few things you need to pay attention to. You need to be careful
that all pins are aligned properly before exerting any downward force.
• First make sure that you have the new chip oriented correctly. The little "dot" at one end
should be facing the closest edge of the board. See the image marker for clarity.
• Make sure all the pins are inserted shallowly into their receptacles. Then push the chip
down firmly.
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Replace and Re-Flash a Blown Arduino
Let's reprogram this new chip!
• From here, you need to hook up your AVR ISP programmer. The 6-pin connector has to
be oriented the correct way. There is a small notch on these connectors. This notch
should be facing the USB connector.
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Replace and Re-Flash a Blown Arduino
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Replace and Re-Flash a Blown Arduino
Tools
Help
&T
Auto Format
Archive Sketch
Fix Encoding & Reload
Serial Monitor OKM
sketch rnarG7b I Arduino 0022
Board
Serial Port
Bum Bootloader
w/ AVR ISP
w/ AVRISP mkll
w/ USBtinyISP
w/ Parallel Programmer
w/ Arduino as ISP
Time to reprogram! If you have not
downloaded the Arduino IDE, this
would be a good time to do so. You
can get it from here . Once you
have it installed, go ahead and fire
it up.
• The last thing to check is to
make sure you have selected
the correct board from the Tools
menu. In this tutorial, we're
using the Uno. So we've
selected "Arduino Uno" as our
board.
Next, we need to "burn the
bootloader," or in other words,
program this chip to work with
the Arduino. Go to:
Tools » Burn Bootloader » w/
AVR ISP mkll
• If you are using a different AVR
ISP, make sure you select the
correct programmer.
• You should see at the bottom of
the debug console "Done burning
bootloader." You should now
have a working Arduino again!
The final test is to load up any
example sketch and click
Upload. That's it!
• If you have any errors,
make sure that your
programmer header (the 6- pin
interface) is oriented correctly.
Also, check that both the
Arduino and the AVR ISP are
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Replace and Re-Flash a Blown Arduino
powered on. I used two different
USB cables for this.
In about 15 minutes, you've removed, replaced, and reprogrammed a new Atmega328P to revive
your Arduino development board. Not bad, don't you think?
For Arduino news, features, tutorials, a buyer's guide, and more, visit the Make: Arduino page
http://makezine.com/arduino/
This document was last generated on 201 2-1 1 -02 1 1 :58:46 PM.
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