So this is my first instructables. Let's try this!.original can be found here:. Alright. Here's the story: I was working on this frustrating Arduino project, and I decided to take a break. I went away to watch a little Star Trek and drink some water. When I came back, my Arduino Mega was hot: really hot.
The Arduino was not responding to the IDE. The only way I could program it was by using the USBtiny ISP. That pretty much ruins the purpose of an arduino board, so I brought out the solder pot, desoldered the whole board, salvaging as many parts as I could. Since the ATmega 2560 was not damaged, I decided to put it back to use: The following is the process of how to. You think it's hard to solder SMD?
Open-source electronic prototyping platform enabling users to create interactive electronic objects. The Arduino Mega 2560 has been designed with bigger and more ambitious projects in mind. The large number of analog and digital pins, together with a larger.
This was my first time soldering SMD chips with 0.5mm pitch (in other words, REALLY SMALL). Parts needed: - ATMega1280 or 2560 Microcontroller (I recommend the ATMega1280, so you can use Arduino IDE to program) - TQFP100, 0.5mm pitch to DIP adapter - Momentary push button - 6 headers (for ISP) - lots of wires - flux - Perfboard - 16 MHZ crystal (if you salvaged chip from Arduino Mega) - OPTIONAL but recommended - double sided tape - OPTIONAL - 330 - 470 ohm resistors.2 - OPTIONAL - two LEDS - OPTIONAL - 5 more headers for FTDI Serial communication - OPTIONAL - nuts and bolts. Hopefully you have an AVR programmer that uses the 6 pin ISP.
Plug it in, type in avrdude -c PROGRAMMER -p m2560 OR 1280 DEPENDING ON WHAT YOU HAVE Does it recognize? If so, BRAVO if not. Check your wires. After you get it working, check your serial communication (This only applies to people who desoldered the m2560 from their old Arduino Mega. For people who are ordering the chip straight out of the factory, there is no bootloader inside of the chip that supports serial programming.). After I plugged in my board to the FTDI converter, the m2560 started spitting out strings from the last program that I was running on it.
So, if you were working with the ATMega 1280, you can just plug it in and burn the bootloader to it. That would be 'Arduino Mega' If you were using the ATMega 2560. You see the Arduino Mega 2560 board has an ATMega 8 or 16 as the UART. In this instructables I was using an FTDI converter.
I would have continued to make some board support for this DIY Mega, however. It burnt out. When soldering in the oscillator crystal, make sure it DOES NOT SHORT THE LEADS. Note that it has a metal casing, so it should either be masked with electrical tape or place in another area. That ended up shorting XTAL 1 and 2, Vcc, and GND all together. The chip smoked and I wasted a lot of effort. As long as you follow all of these instructions, however, you will be able to accomplish what I would have if I have not made that mistake!
In other words I shorted something by accident. If all of you out there remember not to short anything, your mega will work. If you do what I did, by putting the crystal in the wrong place and shorting it, it will not work.